OBC 2006 › Division B

9.23.4.

Version 0 — in force 31 December 2006

← 9.23.3. 9.23.5. →

Within

9.23.

Subprovisions

9.23.4.1.
9.23.4.2. v0 v1
9.23.4.3. v0 v1
9.23.4.4.
9.23.4.5.

In force

Verified · covered Verified against the 2006-12-31–2007-04-01 consolidation, whose range covers the query date. How to read this

In force

Verified · covered Verified against the 2006-12-31–2007-04-01 consolidation, whose range covers the query date. How to read this

Provenance

OBC 1997 · continues from 9.23.4. — Pro

Base · O. Reg. 350/06 · ext← current

Original — base regulation

OBC 2012 · continues as 9.23.4. — Pro

9.23.4. — Maximum Spans

Content not available for this version.

9.23.4.1. — Application

(1) Spans provided in this Subsection for joists, beams and lintels supporting floors shall apply only where,

(a) the floors serve residential areas as described in Table 4.1.5.3.v1, or

(b) the uniformly distributed live load on the floors do not exceed that specified for residential areas as described in Table 4.1.5.3.v1

(2) Spans for joists, beams and lintels supporting floors shall be determined according to Subsection 4.1.3. where the supported floors,

(a) serve other than residential areas, or

(b) support a uniform live load in excess of that specified for residential areas.

Text · e-Laws consolidated snapshot

9.23.4.2. — Spans for Joists, Rafters and Beams

(1) Except as required in Sentence (2) and Article 9.23.13.10., the spans for wood joists and rafters shall conform to the spans shown in Tables A-1 to A-7 for the uniform live loads shown in the Tables.

(2) Spans for floor joists that are not selected from Tables A-1 and A-2 and that are required to be designed for the same loading conditions, shall not exceed the design requirements for uniform loading and vibration criteria.

(3) Spans for built-up wood and glued-laminated timber floor beams shall conform to the spans in Tables A-8 to A-11.

(4) Spans for roof ridge beams shall conform to the spans in Table A-12 for the uniform snow load shown.

Editor's note

In the 'Maximum Spans for Floor Joists - Special Cases' table (Table A-2) under Article 9.23.4.2., the as-filed O. Reg. 350/06 contains several typographical anomalies that this map reproduces as filed: the Column 8 header cell is blank ('Col.'; it is Column 8 by position), one lumber-grade label reads 'No .1' with a misplaced space, and another reads 'No 3' with the period omitted. In the table notes, the '(1)' and '(2)' reference markers appear as plain text. The consolidated e-Laws version silently supplies the missing characters, superscripts the note markers, and bolds the notes heading; none of these changes was enacted by an amending regulation.

Text · e-Laws consolidated snapshot

Table A-2 Maximum Spans for Floor Joists – Special Cases(1) Forming Part of Sentence 9.23.4.2.(1) and 9.23.4.4.(2)

Column 1	Column 2	Column 3	Col. 4	Col. 5	Col. 6	Col. 7	Col.	Col. 9	Col. 10	Col. 11	Col. 12
Commercial Designation	Grade	Joist Size, mm	Maximum Span, m
			Joists with Ceilings Attached to Wood Furring						Joists with Concrete Topping
			Without Bridging			With Bridging			With or Without Bridging⁽²⁾
			Joist Spacing, mm			Joist Spacing, mm			Joist Spacing, mm
			300	400	600	300	400	600	300	400	600
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	Select	38 × 89	2.19	1.99	1.73	2.19	1.99	1.73	2.19	1.99	1.73
	Structural	38 × 140	3.44	3.12	2.73	3.44	3.12	2.73	3.44	3.12	2.73
		38 × 184	4.24	3.99	3.59	4.52	4.11	3.59	4.52	4.11	3.59
		38 × 235	4.98	4.69	4.29	5.47	5.20	4.58	5.77	5.24	4.58
		38 × 286	5.67	5.34	4.88	6.19	5.89	5.54	6.83	6.37	5.58
	No. 1 and	38 × 89	2.09	1.90	1.66	2.09	1.90	1.66	2.09	1.90	1.66
	No. 2	38 × 140	3.29	2.99	2.62	3.29	2.99	2.62	3.29	2.99	2.55
		38 × 184	4.06	3.83	3.44	4.33	3.93	3.44	4.33	3.81	3.11
		38 × 235	4.78	4.50	4.11	5.24	4.98	4.31	5.37	4.65	3.80
		38 × 286	5.44	5.12	4.68	5.93	5.64	5.00	6.24	5.40	4.41
	No. 3	38 × 89	1.95	1.69	1.38	1.95	1.69	1.38	1.72	1.49	1.21
		38 × 140	2.78	2.41	1.97	2.78	2.41	1.97	2.45	2.12	1.73
		38 × 184	3.38	2.93	2.39	3.38	2.93	2.39	2.98	2.58	2.11
		38 × 235	4.14	3.58	2.93	4.14	3.58	2.93	3.65	3.16	2.58
		38 × 286	4.80	4.16	3.39	4.80	4.16	3.39	4.23	3.66	2.99
	Construction	38 × 89	2.03	1.84	1.61	2.03	1.84	1.61	2.03	1.84	1.61
	Standard	38 × 89	1.88	1.63	1.33	1.88	1.63	1.33	1.66	1.44	1.17
Hem – Fir (includes Western Hemlock and Amabilis Fir)	Select	38 × 89	2.16	1.96	1.71	2.16	1.96	1.71	2.16	1.96	1.71
	Structural	38 × 140	3.39	3.08	2.69	3.39	3.08	2.69	3.39	3.08	2.69
		38 × 184	4.18	3.94	3.54	4.46	4.05	3.54	4.46	4.05	3.54
		38 × 235	4.92	4.63	4.23	5.39	5.13	4.52	5.69	5.17	4.52
		38 × 286	5.60	5.27	4.82	6.10	5.81	5.47	6.74	6.28	5.50
	No .1 and	38 × 89	2.09	1.90	1.66	2.09	1.90	1.66	2.09	1.90	1.66
	No. 2	38 × 140	3.29	2.99	2.62	3.29	2.99	2.62	3.29	2.99	2.62
		38 × 184	4.06	3.83	3.44	4.33	3.93	3.44	4.33	3.93	3.26
		38 × 235	4.78	4.50	4.11	5.24	4.98	4.39	5.53	4.88	3.99
		38 × 286	5.44	5.12	4.68	5.93	5.64	5.25	6.54	5.66	4.63
	No 3	38 × 89	2.03	1.84	1.61	2.03	1.84	1.61	2.03	1.83	1.50
		38 × 140	3.19	2.90	2.43	3.19	2.90	2.43	3.02	2.62	2.14
		38 × 184	3.94	3.61	2.95	4.17	3.61	2.95	3.68	3.18	2.60
		38 × 235	4.63	4.36	3.61	5.08	4.42	3.61	4.50	3.89	3.18
		38 × 286	5.27	4.96	4.19	5.74	5.13	4.19	5.22	4.52	3.69
	Construction	38 × 89	2.03	1.84	1.61	2.03	1.84	1.61	2.03	1.84	1.61
	Standard	38 × 89	1.96	1.71	1.39	1.96	1.71	1.39	1.74	1.50	1.23
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	Select	38 × 89	2.06	1.87	1.64	2.06	1.87	1.64	2.06	1.87	1.64
	Structural	38 × 140	3.24	2.95	2.57	3.24	2.95	2.57	3.24	2.95	2.57
		38 × 184	4.00	3.77	3.38	4.26	3.87	3.38	4.26	3.87	3.38
		38 × 235	4 70	4.43	4.05	5.16	4.91	4.32	5.45	4.95	4.32
		38 × 286	5.35	5.04	4.61	5.84	5.55	5.23	6.45	6.01	5.26
	No. 1 and	38 × 89	1.99	1.81	1.58	1.99	1.81	1.58	1.99	1.81	1.58
	No. 2	38 × 140	3.14	2.85	2.49	3.14	2.85	2.49	3.14	2.85	2.49
		38 × 184	3.87	3.64	3.27	4.12	3.75	3.27	4.12	3.75	3.27
		38 × 235	4.55	4.28	3.91	4.99	4.75	4.18	5.27	4.79	4.13
		38 × 286	5.18	4.88	4.46	5.65	5.37	5.06	6.23	5.81	4.79
	No. 3	38 × 89	1.96	1.78	1.55	1.96	1.78	1.55	1.96	1.78	1.50
		38 × 140	3.08	2.80	2.43	3.08	2.80	2.43	3.02	2.62	2.14
		38 × 184	3.80	3.58	2.95	4.05	3.61	2.95	3.68	3.18	2.60
		38 × 235	4.47	4.21	3.61	4.90	4.42	3.61	4.50	3.89	3.18
		38 × 286	5.09	4.79	4.19	5.55	5.13	4.19	5.22	4.52	3.69
	Construction	38 × 89	1.96	1.78	1.55	1.96	1.78	1.55	1.96	1.78	1.55
	Standard	38 × 89	1.88	1.71	1.44	1.88	1.71	1.44	1.80	1.56	1.27
Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules	Select	38 × 89	1.84	1.68	1.46	1.84	1.68	1.46	1.84	1.68	1.46
	Structural	38 × 140	2.90	2.63	2.30	2.90	2.63	2.30	2.90	2.63	2.30
		38 × 184	3.58	3.37	3.03	3.81	3.46	3.03	3.81	3.46	3.03
		38 × 235	4.20	3.96	3.62	4.61	4.39	3.86	4.87	4.42	3.86
		38 × 286	4.79	4.51	4.12	5.22	4.96	4.68	5.76	5.37	4.54
	No. 1 and	38 × 89	1.80	1.64	1.43	1.80	1.64	1.43	1.80	1.64	1.43
	No. 2	38 × 140	2.83	2.57	2.25	2.83	2.57	2.25	2.83	2.57	2.23
		38 × 184	3.50	3.29	2.96	3.72	3.38	2.96	3.72	3.32	2.71
		38 × 235	4.11	3.87	3.54	4.51	4.29	3.76	4.69	4.06	3.31
		38 × 286	4.68	4.40	4.03	5.10	4.85	4.36	5.44	4.71	3.84
	No. 3	38 × 89	1.76	1.60	1.36	1.76	1.60	1.36	1.70	1.47	1.20
		38 × 140	2.75	2.38	1.94	2.75	2.38	1.94	2.42	2.10	1.71
		38 × 184	3.35	2.90	2.37	3.35	2.90	2.37	2.95	2.55	2.08
		38 × 235	4.01	3.54	2.89	4.09	3.54	2.89	3.61	3.12	2.55
		38 × 286	4.56	4.11	3.36	4.75	4.11	3.36	4.18	3.62	2.96
	Construction	38 × 89	1.76	1.60	1.40	1.76	1.60	1.40	1.76	1.60	1.37
	Standard	38 × 89	1.63	1.41	1.15	1.63	1.41	1.15	1.44	1.25	1.02

Notes to Table A-2:

⁽¹⁾Spans apply only where the floors serve residential areas as described in Table 4.1.5.3.v1, or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.5.3.v1

⁽²⁾No bridging is assumed for spans for floor joists with concrete topping.

Table A-1 Maximum Spans for Floor Joists – General Cases(1) Forming Part of Sentence 9.23.4.2.(1)


Column 1	Column 2	Column 3	Col. 4	Col. 5	Col. 6	Col. 7	Col. 8	Col. 9	Col. 10	Col. 11	Col. 12
Commercial Designation	Grade	Joist Size, mm	Maximum Span, m
			With Strapping⁽²⁾			With Bridging			With Strapping⁽²⁾ and Bridging
			Joist Spacing, mm			Joist Spacing, mm			Joist Spacing, mm
			300	400	600	300	400	600	300	400	600
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	Select	38 × 89	2.13	1.97	1.73	2.19	1.99	1.73	2.19	1.99	1.73
	Structural	38 × 140	3.23	3.07	2.73	3.44	3.12	2.73	3.44	3.12	2.73
		38 × 184	3.88	3.69	3.51	4.18	3.92	3.59	4.37	4.07	3.59
		38 × 235	4.57	4.34	4.13	4.86	4.57	4.29	5.05	4.70	4.39
		38 × 286	5.21	4.95	4.71	5.49	5.16	4.85	5.66	5.28	4.92
	No. 1	38 × 89	2.00	1.85	1.66	2.09	1.90	1.66	2.09	1.90	1.66
	and No. 2	38 × 140	3.09	2.91	2.62	3.29	2.99	2.62	3.29	2.99	2.62
		38 × 184	3.71	3.53	3.36	4.00	3.76	3.44	4.19	3.90	3.44
		38 × 235	4.38	4.16	3.96	4.66	4.38	4.11	4.84	4.51	4.20
		38 × 286	4.99	4.75	4.52	5.26	4.94	4.65	5.43	5.06	4.72
	No. 3	38 × 89	1.90	1.69	1.38	1.95	1.69	1.38	1.95	1.69	1.38
		38 × 140	2.78	2.41	1.97	2.78	2.41	1.97	2.78	2.41	1.97
		38 × 184	3.38	2.93	2.39	3.38	2.93	2.39	3.38	2.93	2.39
		38 × 235	4.14	3.58	2.93	4.14	3.58	2.93	4.14	3.58	2.93
		38 × 286	4.80	4.16	3.39	4.80	4.16	3.39	4.80	4.16	3.39
	Construction	38 × 89	1.90	1.77	1.61	2.03	1.84	1.61	2.03	1.84	1.61
	Standard	38 × 89	1.81	1.63	1.33	1.88	1.63	1.33	1.88	1.63	1.33
Hem – Fir (includes Western Hemlock and Amabilis Fir)	Select	38 × 89	2.08	1.93	1.71	2.16	1.96	1.71	2.16	1.96	1.71
	Structural	38 × 140	3.18	3.03	2.69	3.39	3.08	2.69	3.39	3.08	2.69
		38 × 184	3.82	3.64	3.46	4.12	3.87	3.54	4.31	4.02	3.54
		38 × 235	4.50	4.28	4.08	4.80	4.51	4.23	4.98	4.64	4.33
		38 × 286	5.14	4.89	4.65	5.42	5.09	4.78	5.59	5.21	4.86
	No. 1 and	38 × 89	2.00	1.85	1.66	2.09	1.90	1.66	2.09	1.90	1.66
	No. 2	38 × 140	3.09	2.91	2.62	3.29	2.99	2.62	3.29	2.99	2.62
		38 × 184	3.71	3.53	3.36	4.00	3.76	3.44	4.19	3.90	3.44
		38 × 235	4.38	4.16	3.96	4.66	4.38	4.11	4.84	4.51	4.20
		38 × 286	4.99	4.75	4.52	5.26	4.94	4.65	5.43	5.06	4.72
	No. 3	38 × 89	1.90	1.77	1.61	2.03	1.84	1.61	2.03	1.84	1.61
		38 × 140	2.99	2.78	2.43	3.19	2.90	2.43	3.19	2.90	2.43
		38 × 184	3.60	3.42	2.95	3.88	3.61	2.95	4.06	3.61	2.95
		38 × 235	4.24	4.03	3.61	4.51	4.24	3.61	4.68	4.37	3.61
		38 × 286	4.84	4.60	4.19	5.10	4.79	4.19	5.26	4.90	4.19
	Construction	38 × 89	1.90	1.77	1.61	2.03	1.84	1.61	2.03	1.84	1.61
	Standard	38 × 89	1.81	1.68	1.39	1.96	1.71	1.39	1.96	1.71	1.39
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	Select	38 × 89	1.95	1.81	1.64	2.06	1.87	1.64	2.06	1.87	1.64
	Structural	38 × 140	3.05	2.85	2.57	3.24	2.95	2.57	3.24	2.95	2.57
		38 × 184	3.66	3.48	3.31	3.94	3.70	3.38	4.12	3.84	3.38
		38 × 235	4.31	4.10	3.90	4.59	4.31	4.05	4.76	4.44	4.14
		38 × 286	4.91	4.67	4.45	5.18	4.87	4.57	5.34	4.98	4.64
	No. 1 and	38 × 89	1.86	1.72	1.58	1.99	1.81	1.58	1.99	1.81	1.58
	No. 2	38 × 140	2.92	2.71	2.49	3.14	2.85	2.49	3.14	2.85	2.49
		38 × 184	3.54	3.36	3.20	3.81	3.58	3.27	3.99	3.72	3.27
		38 × 235	4.17	3.96	3.77	4.44	4.17	3.92	4.60	4.29	4.00
		38 × 286	4.75	4.52	4.30	5.01	4.71	4.42	5.17	4.82	4.49
	No. 3	38 × 89	1.81	1.68	1.55	1.96	1.78	1.55	1.96	1.78	1.55
		38 × 140	2.84	2.64	2.43	3.08	2.80	2.43	3.08	2.80	2.43
		38 × 184	3.47	3.30	2.95	3.74	3.52	2.95	3.92	3.61	2.95
		38 × 235	4.09	3.89	3.61	4.36	4.09	3.61	4.52	4.22	3.61
		38 × 286	4.67	4.44	4.19	4.92	4.62	4.19	5.08	4.73	4.19
	Construction	38 × 89	1.81	1.68	1.55	1.96	1.78	1.55	1.96	1.78	1.55
	Standard	38 × 89	1.70	1.58	1.44	1.88	1.71	1.44	1.88	1.71	1.44
Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules	Select	38 × 89	1.65	1.53	1.42	1.84	1.68	1.46	1.84	1.68	1.46
	Structural	38 × 140	2.59	2.41	2.24	2.90	2.63	2.30	2.90	2.63	2.30
		38 × 184	3.27	3.11	2.94	3.52	3.31	3.03	3.69	3.44	3.03
		38 × 235	3.85	3.66	3.48	4.10	3.85	3.62	4.26	3.97	3.70
		38 × 286	4.39	4.18	3.97	4.63	4.35	4.09	4.78	4.45	4.15
	No. 1 and	38 × 89	1.59	1.48	1.37	1.80	1.64	1.43	1.80	1.64	1.43
	No. 2	38 × 140	2.51	2.33	2.16	2.83	2.57	2.25	2.83	2.57	2.25
		38 × 184	3.19	3.04	2.84	3.44	3.23	2.96	3.60	3.36	2.96
		38 × 235	3.76	3.58	3.41	4.01	3.77	3.54	4.16	3.88	3.62
		38 × 286	4.29	4.08	3.88	4.53	4.25	4.00	4.67	4.35	4.06
	No. 3	38 × 89	1.54	1.43	1.32	1.74	1.57	1.36	1.76	1.60	1.36
		38 × 140	2.42	2.24	1.94	2.74	2.38	1.94	2.75	2.38	1.94
		38 × 184	3.12	2.90	2.37	3.35	2.90	2.37	3.35	2.90	2.37
		38 × 235	3.67	3.49	2.89	3.91	3.54	2.89	4.06	3.54	2.89
		38 × 286	4.19	3.98	3.36	4.42	4.11	3.36	4.55	4.11	3.36
	Construction	38 × 89	1.54	1.43	1.32	1.74	1.57	1.40	1.76	1.60	1.40
	Standard	38 × 89	1.48	1.37	1.15	1.63	1.41	1.15	1.63	1.41	1.15

Notes to Table A-1:

⁽¹⁾ Spans apply only where the floors serve residential areas as described in Table 4.1.5.3.v1, or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.5.3.v1

⁽²⁾ See Sentence 9.23.9.4.(5) for alternatives to strapping.

Table A-3 Maximum Spans for Ceiling Joists – Attic not Accessible by a Stairway Forming Part of Sentence 9.23.4.2.(1)


Column 1	Column 2	Column 3	Column 4	Column 5	Column 6
Commercial Designation	Grade	Joist Size, mm	Maximum Span, m
			Joist Spacing, mm
			300	400	600
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	Select Structural	38 × 89	3.4	3.10	2.71
		38 × 140	5.37	4.88	4.26
		38 × 184	7.05	6.41	5.60
		38 × 235	9.01	8.18	7.15
		38 × 286	10.96	9.96	8.70
	No. 1 and No. 2	38 × 89	3.27	2.97	2.59
		38 × 140	5.14	4.67	4.08
		38 × 184	6.76	6.14	5.36
		38 × 235	8.63	7.84	6.85
		38 × 286	10.50	9.54	8.34
	No. 3	38 × 89	3.17	2.88	2.42
		38 × 140	4.89	4.23	3.46
		38 × 184	5.95	5.15	4.20
		38 × 235	7.27	6.30	5.14
		38 × 286	8.44	7.31	5.97
	Construction	38 × 89	3.17	2.88	2.51
	Standard	38 × 89	3.06	2.78	2.34
Hem – Fir (includes Western Hemlock and Amabilis Fir)	Select Structural	38 × 89	3.36	3.06	2.67
		38 × 140	5.29	4.81	4.20
		38 × 184	6.96	6.32	5.52
		38 × 235	8.88	8.07	7.05
		38 × 286	10.81	9.82	8.58
	No. 1 and No. 2	38 × 89	3.27	2.97	2.59
		38 × 140	5.14	4.67	4.08
		38 × 184	6.76	6.14	5.36
		38 × 235	8.63	7.84	6.85
		38 × 286	10.50	9.54	8.34
	No. 3	38 × 89	3.17	2.88	2.51
		38 × 140	4.98	4.53	3.95
		38 × 184	6.55	5.95	5.19
		38 × 235	8.36	7.60	6.34
		38 × 286	10.18	9.01	7.36
	Construction	38 × 89	3.17	2.88	2.50
	Standard	38 × 89	3.06	2.78	2.43
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	Select Structural	38 × 89	3.22	2.92	2.55
		38 × 140	5.06	4.60	4.02
		38 × 184	6.65	6.05	5.28
		38 × 235	8.50	7.72	6.74
		38 × 286	10.34	9.40	8.21
	No. 1 and No. 2	38 × 89	3.11	2.83	2.47
		38 × 140	4.90	4.45	3.89
		38 × 184	6.44	5.85	5.11
		38 × 235	8.22	7.47	6.52
		38 × 286	10.00	9.09	7.94
	No. 3	38 × 89	3.06	2.78	2.43
		38 × 140	4.81	4.37	3.82
		38 × 184	6.32	5.74	5.02
		38 × 235	8.07	7.33	6.34
		38 × 286	9.82	8.93	7.36
	Construction	38 × 89	3.06	2.78	2.43
	Standard	38 × 89	2.94	2.67	2.33
Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules	Select Structural	38 × 89	2.88	2.61	2.28
		38 × 140	4.53	4.11	3.59
		38 × 184	5.95	5.40	4.72
		38 × 235	7.60	6.90	6.03
		38 × 286	9.25	8.40	7.34
	No. 1 and No. 2	38 × 89	2.81	2.55	2.23
		38 × 140	4.42	4.02	3.51
		38 × 184	5.81	5.28	4.61
		38 × 235	7.42	6.74	5.89
		38 × 286	9.03	8.21	7.17
	No. 3	38 × 89	2.74	2.49	2.18
		38 × 140	4.31	3.92	3.42
		38 × 184	5.67	5.09	4.16
		38 × 235	7.19	6.23	5.08
		38 × 286	8.34	7.23	5.90
	Construction	38 × 89	2.74	2.49	2.18
	Standard	38 × 89	2.67	2.43	2.03

Table A-4 Maximum Spans for Roof Joists – Specified Roof Snow Loads 1.0 to 2.0 kPa Forming Part of Sentence 9.23.4.2.(1)


Column 1	Column 2	Column 3	Col. 4	Col. 5	Col. 6	Col. 7	Col. 8	Col. 9	Col. 10	Col. 11	Col. 12
Commercial Designation	Grade	Joist Size, mm	Maximum Span, m
			Specified Snow Load, kPa
			1.0			1.5			2.0
			Joist Spacing, mm			Joist Spacing, mm			Joist Spacing, mm
			300	400	600	300	400	600	300	400	600
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	Select	38 × 89	2.71	2.46	2.15	2.37	2.15	1.88	2.15	1.95	1.71
	Structural	38 × 140	4.26	3.87	3.38	3.72	3.38	2.95	3.38	3.07	2.68
		38 × 184	5.60	5.09	4.44	4.89	4.44	3.88	4.44	4.04	3.53
		38 × 235	7.15	6.49	5.67	6.24	5.67	4.96	5.67	5.15	4.50
		38 × 286	8.70	7.90	6.91	7.60	6.91	6.03	6.91	6.27	5.48
	No. 1 and	38 × 89	2.59	2.36	2.06	2.27	2.06	1.80	2.06	1.87	1.63
	No. 2	38 × 140	4.08	3.71	3.24	3.57	3.24	2.83	3.24	2.94	2.57
		38 × 184	5.36	4.87	4.26	4.69	4.26	3.72	4.26	3.87	3.38
		38 × 235	6.85	6.22	5.44	5.98	5.44	4.74	5.44	4.94	4.22
		38 × 286	8.34	7.57	6.40	7.28	6.62	5.50	6.62	6.00	4.90
	No. 3	38 × 89	2.49	2.16	1.76	2.14	1.85	1.51	1.91	1.65	1.35
		38 × 140	3.56	3.08	2.51	3.06	2.65	2.16	2.72	2.36	1.92
		38 × 184	4.33	3.75	3.06	3.72	3.22	2.63	3.31	2.87	2.34
		38 × 235	5.29	4.58	3.74	4.55	3.94	3.22	4.05	3.51	2.86
		38 × 286	6.14	5.32	4.34	5.28	4.57	3.73	4.70	4.07	3.32
	Construction	38 × 89	2.51	2.28	1.99	2.20	1.99	1.74	1.99	1.81	1.58
	Standard	38 × 89	2.41	2.08	1.70	2.07	1.79	1.46	1.84	1.60	1.30
Hem – Fir (includes Western Hemlock and Amabilis Fir)	Select	38 × 89	2.67	2.43	2.12	2.33	2.12	1.85	2.12	1.93	1.68
	Structural	38 × 140	4.20	3.82	3.33	3.67	3.33	2.91	3.33	3.03	2.65
		38 × 184	5.52	5.02	4.38	4.82	4.38	3.83	4.38	3.98	3.48
		38 × 235	7.05	6.41	5.60	6.16	5.60	4.89	5.60	5.09	4.44
		38 × 286	8.58	7.80	6.81	7.50	6.81	5.95	6.81	6.19	5.41
	No. 1 and	38 × 89	2.59	2.36	2.06	2.27	2.06	1.80	2.06	1.87	1.63
	No. 2	38 × 140	4.08	3.71	3.24	3.57	3.24	2.83	3.24	2.94	2.57
		38 × 184	5.36	4.87	4.26	4.69	4.26	3.72	4.26	3.87	3.38
		38 × 235	6.85	6.22	5.44	5.98	5.44	4.75	5.44	4.94	4.32
		38 × 286	8.34	7.57	6.62	7.28	6.62	5.77	6.62	6.01	5.25
	No. 3	38 × 89	2.51	2.28	1.99	2.20	1.99	1.74	1.99	1.81	1.58
		38 × 140	3.95	3.59	3.10	3.45	3.14	2.67	3.14	2.85	2.37
		38 × 184	5.20	4.62	3.77	4.54	3.97	3.24	4.09	3.54	2.89
		38 × 235	6.53	5.65	4.61	5.61	4.86	3.97	5.00	4.33	3.53
		38 × 286	7.57	6.56	5.35	6.51	5.64	4.60	5.80	5.02	4.10
	Construction	38 × 89	2.51	2.28	1.99	2.20	1.99	1.74	1.99	1.81	1.58
	Standard	38 × 89	2.43	2.18	1.78	2.12	1.88	1.53	1.93	1.67	1.36
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	Select	38 × 89	2.55	2.32	2.03	2.23	2.03	1.77	2.03	1.84	1.61
	Structural	38 × 140	4.02	3.65	3.19	3.51	3.19	2.79	3.19	2.90	2.53
		38 × 184	5.28	4.80	4.19	4.61	4.19	3.66	4.19	3.81	3.33
		38 × 235	6.74	6.13	5.35	5.89	5.35	4.68	5.35	4.86	4.25
		38 × 286	8.21	7.46	6.52	7.17	6.52	5.69	6.52	5.92	5.17
	No. 1 and	38 × 89	2.47	2.24	1.96	2.16	1.96	1.71	1.96	1.78	1.56
	No. 2	38 × 140	3.89	3.53	3.08	3.40	3.08	2.69	3.08	2.80	2.45
		38 × 184	5.11	4.64	4.05	4.46	4.05	3.54	4.05	3.68	3.22
		38 × 235	6.52	5.93	5.18	5.70	5.18	4.52	5.18	4.70	4.11
		38 × 286	7.94	7.21	6.30	6.94	6.30	5.50	6.30	5.73	5.00
	No. 3	38 × 89	2.43	2.20	1.93	2.12	1.93	1.68	1.93	1.75	1.53
		38 × 140	3.82	3.47	3.03	3.33	3.03	2.65	3.03	2.75	2.37
		38 × 184	5.02	4.56	3.77	4.38	3.97	3.24	3.98	3.54	2.89
		38 × 235	6.41	5.65	4.61	5.60	4.86	3.97	5.00	4.33	3.53
		38 × 286	7.57	6.56	5.35	6.51	5.64	4.60	5.80	5.02	4.10
	Construction	38 × 89	2.43	2.20	1.93	2.12	1.93	1.68	1.93	1.75	1.53
	Standard	38 × 89	2.33	2.12	1.85	2.04	1.85	1.59	1.85	1.68	1.41
Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules	Select	38 × 89	2.28	2.07	1.81	1.99	1.81	1.58	1.81	1.65	1.44
	Structural	38 × 140	3.59	3.26	2.85	3.14	2.85	2.49	2.85	2.59	2.26
		38 × 184	4.72	4.29	3.75	4.12	3.75	3.27	3.75	3.40	2.97
		38 × 235	6.03	5.48	4.79	5.27	4.79	4.18	4.79	4.35	3.80
		38 × 286	7.34	6.67	5.82	6.41	5.82	5.09	5.82	5.29	4.62
	No. 1 and	38 × 89	2.23	2.03	1.77	1.95	1.77	1.55	1.77	1.61	1.41
	No. 2	38 × 140	3.51	3.19	2.79	3.07	2.79	2.43	2.79	2.53	2.21
		38 × 184	4.61	4.19	3.66	4.03	3.66	3.20	3.66	3.33	2.91
		38 × 235	5.89	5.35	4.68	5.15	4.68	4.09	4.68	4.25	3.68
		38 × 286	7.17	6.52	5.58	6.26	5.69	4.80	5.69	5.17	4.27
	No. 3	38 × 89	2.18	1.98	1.73	1.90	1.73	1.50	1.73	1.57	1.33
		38 × 140	3.42	3.05	2.49	2.99	2.62	2.14	2.69	2.33	1.90
		38 × 184	4.28	3.71	3.03	3.68	3.19	2.60	3.28	2.84	2.32
		38 × 235	5.23	4.53	3.70	4.50	3.90	3.18	4.01	3.47	2.83
		38 × 286	6.07	5.26	4.29	5.22	4.52	3.69	4.65	4.03	3.29
	Construction	38 × 89	2.18	1.98	1.73	1.90	1.73	1.51	1.73	1.57	1.37
	Standard	38 × 89	2.09	1.81	1.48	1.80	1.56	1.27	1.60	1.38	1.13

Table A-5 Maximum Spans for Roof Joists – Specified Roof Snow Loads 2.5 and 3.0 kPa Forming Part of Sentence 9.23.4.2.(1)


Column 1	Column 2	Column 3	Column 4	Column 5	Column 6	Column 7	Column 8		Column 9
Commercial Designation	Grade	Joist Size, mm	Maximum Span, m
			Specified Snow Load, kPa
			2.5			3.0
			Joist Spacing, mm			Joist Spacing, mm
			300	400	600	300	400		600
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	Select	38 × 89	1.99	1.81	1.58	1.88	1.71		1.49
	Structural	38 × 140	3.14	2.85	2.49	2.95	2.68		2.34
		38 × 184	4.12	3.75	3.27	3.88	3.53		3.08
		38 × 235	5.27	4.79	4.18	4.96	4.50		3.93
		38 × 286	6.41	5.82	5.09	6.03	5.48		4.79
	No. 1 and	38 × 89	1.91	1.74	1.52	1.80	1.63		1.43
	No. 2	38 × 140	3.01	2.73	2.39	2.83	2.57		2.25
		38 × 184	3.95	3.59	3.14	3.72	3.38		2.90
		38 × 235	5.05	4.59	3.84	4.75	4.32		3.55
		38 × 286	6.14	5.46	4.46	5.78	5.05		4.12
	No. 3	38 × 89	1.74	1.50	1.23	1.60	1.39		1.13
		38 × 140	2.48	2.15	1.75	2.29	1.98		1.62
		38 × 184	3.01	2.61	2.13	2.79	2.41		1.97
		38 × 235	3.69	3.19	2.61	3.41	2.95		2.41
		38 × 286	4.28	3.70	3.03	3.95	3.42		2.79
	Construction	38 × 89	1.85	1.68	1.47	1.74	1.58		1.38
	Standard	38 × 89	1.68	1.45	1.19	1.55	1.34		1.10
Hem – Fir (includes Western Hemlock and Amabilis Fir)	Select	38 × 89	1.97	1.79	1.56	1.85	1.68		1.47
	Structural	38 × 140	3.10	2.81	2.46	2.91	2.65		2.31
		38 × 184	4.07	3.70	3.23	3.83	3.48		3.04
		38 × 235	5.20	4.72	4.12	4.89	4.44		3.88
		38 × 286	6.32	5.75	5.02	5.95	5.41		4.72
	No. 1 and	38 × 89	1.91	1.74	1.52	1.80	1.63		1.43
	No. 2	38 × 140	3.01	2.73	2.39	2.83	2.57		2.25
		38 × 184	3.95	3.59	3.14	3.72	3.38		2.95
		38 × 235	5.05	4.59	4.01	4.75	4.32		3.72
		38 × 286	6.14	5.58	4.68	5.78	5.25		4.32
	No. 3	38 × 89	1.85	1.68	1.47	1.74	1.58		1.38
		38 × 140	2.91	2.65	2.16	2.74	2.45		2.00
		38 × 184	3.72	3.22	2.63	3.44	2.98		2.43
		38 × 235	4.55	3.94	3.22	4.20	3.64		2.97
		38 × 286	5.28	4.57	3.73	4.88	4.22		3.45
	Construction	38 × 89	1.85	1.68	1.47	1.74	1.58		1.38
	Standard	38 × 89	1.76	1.52	1.24	1.62	1.40		1.15
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	Select	38 × 89	1.88	1.71	1.49	1.77		1.61		1.41
	Structural	38 × 140	2.96	2.69	2.35	2.79		2.53		2.21
		38 × 184	3.89	3.54	3.09	3.66		3.33		2.91
		38 × 235	4.97	4.52	3.94	4.68		4.25		3.71
		38 × 286	6.05	5.50	4.80	5.69		5.17		4.52
	No. 1 and	38 × 89	1.82	1.65	1.44	1.71		1.56		1.36
	No. 2	38 × 140	2.86	2.60	2.27	2.69		2.45		2.14
		38 × 184	3.76	3.42	2.99	3.54		3.22		2.81
		38 × 235	4.81	4.37	3.82	4.52		4.11		3.59
		38 × 286	5.85	5.31	4.64	5.50		5.00		4.37
	No. 3	38 × 89	1.79	1.62	1.42	1.68		1.53		1.34
		38 × 140	2.81	2.56	2.16	2.65		2.40		2.005
		38 × 184	3.70	3.22	2.63	3.44		2.98		2.43
		38 × 235	4.55	3.94	3.22	4.20		3.64		2.97
		38 × 286	5.28	4.57	3.73	4.88		4.22		3.45
	Construction	38 × 89	1.79	1.62	1.42	1.68		1.53		1.34
	Standard	38 × 89	1.72	1.56	1.29	1.62		1.46		1.19
Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules	Select	38 × 89	1.68	1.53	1.34	1.58		1.44		1.26
	Structural	38 × 140	2.65	2.40	2.10	2.49		2.26		1.98
		38 × 184	3.48	3.16	2.76	3.27		2.97		2.60
		38 × 235	4.44	4.04	3.53	4.18		3.80		3.32
		38 × 286	5.41	4.91	4.29	5.09		4.62		4.04
	No. 1 and	38 × 89	1.64	1.49	1.31	1.55		1.41		1.23
	No. 2	38 × 140	2.59	2.35	2.05	2.43		2.21		1.93
		38 × 184	3.40	3.09	2.70	3.20		2.91		2.53
		38 × 235	4.34	3.94	3.35	4.09		3.71		3.10
		38 × 286	5.28	4.76	3.89	4.97		4.40		3.59
	No. 3	38 × 89	1.60	1.46	1.21	1.51		1.37		1.12
		38 × 140	2.45	2.12	1.73	2.26		1.96		1.60
		38 × 184	2.98	2.58	2.11	2.76		2.39		1.95
		38 × 235	3.65	3.16	2.58	3.37		2.92		2.38
		38 × 286	4.23	3.66	2.99	3.91		3.39		2.76
	Construction	38 × 89	1.60	1.46	1.27	1.51		1.37		1.20
	Standard	38 × 89	1.46	1.26	1.03	1.34		1.16		0.95

Table A-6 Maximum Spans for Roof Rafters – Specified Roof Snow Loads 1.0 to 2.0 kPa Forming Part of Sentence 9.23.4.2.(1)


Column 1	Column 2	Column 3	Col. 4	Col. 5	Col. 6	Col. 7	Col. 8	Col. 9	Col. 10	Col. 11	Col. 12
Commercial Designation	Grade	Rafter Size, mm	Maximum Span, m
			Specified Snow Load, kPa
			1.0			1.5			2.0
			Rafter Spacing, mm			Rafter Spacing, mm			Rafter Spacing, mm
			300	400	600	300	400	600	300	400	600
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	Select	38 × 89	3.41	3.10	2.71	2.98	2.71	2.37	2.71	2.46	2.15
	Structural	38 × 140	5.37	4.88	4.26	4.69	4.26	3.72	4.26	3.87	3.38
		38 × 184	7.05	6.41	5.60	6.16	5.60	4.89	5.60	5.09	4.44
		38 × 235	9.01	8.18	7.15	7.87	7.15	6.24	7.15	6.49	5.62
		38 × 286	10.96	9.96	8.70	9.58	8.70	7.40	8.70	7.90	6.52
	No. 1 and	38 × 89	3.27	2.97	2.59	2.86	2.59	2.27	2.59	2.36	2.06
	No. 2	38 × 140	5.14	4.67	3.95	4.49	4.08	3.34	4.08	3.60	2.94
		38 × 184	6.76	5.88	4.80	5.74	4.97	4.06	5.06	4.38	3.58
		38 × 235	8.30	7.19	5.87	7.02	6.08	4.96	6.19	5.36	4.38
		38 × 286	9.63	8.34	6.81	8.14	7.05	5.76	7.18	6.22	5.08
	No. 3	38 × 89	2.65	2.30	1.87	2.24	1.94	1.58	1.98	1.71	1.40
		38 × 140	3.78	3.28	2.68	3.20	2.77	2.26	2.82	2.44	1.99
		38 × 184	4.61	3.99	3.26	3.89	3.37	2.75	3.43	2.97	2.43
		38 × 235	5.63	4.88	3.98	4.76	4.12	3.37	4.20	3.64	2.97
		38 × 286	6.53	5.66	4.62	5.52	4.78	3.91	4.87	4.22	3.44
	Construction	38 × 89	3.17	2.88	2.42	2.77	2.50	2.04	2.51	2.21	1.80
	Standard	38 × 89	2.56	2.22	1.81	2.17	1.88	1.53	1.91	1.65	1.35
Hem – Fir (includes Western Hemlock and Amabilis Fir)	Select	38 × 89	3.36	3.06	2.67	2.94	2.67	2.33	2.67	2.43	2.12
	Structural	38 × 140	5.29	4.81	4.20	4.62	4.20	3.67	4.20	3.82	3.33
		38 × 184	6.96	6.32	5.52	6.08	5.52	4.82	5.52	5.02	4.38
		38 × 235	8.88	8.07	7.05	7.76	7.05	6.16	7.05	6.41	5.54
		38 × 286	10.81	9.82	8.58	9.45	8.58	7.28	8.58	7.80	6.42
	No. 1 and	38 × 89	3.27	2.97	2.59	2.86	2.59	2.27	2.59	2.36	2.06
	No. 2	38 × 140	5.14	4.67	4.08	4.49	4.08	3.50	4.08	3.71	3.08
		38 × 184	6.76	6.14	5.04	5.90	5.21	4.26	5.31	4.60	3.75
		38 × 235	8.63	7.54	6.16	7.36	6.37	5.20	6.49	5.62	4.59
		38 × 286	10.11	8.75	7.15	8.54	7.40	6.04	7.53	6.52	5.33
	No. 3	38 × 89	3.17	2.83	2.31	2.76	2.39	1.95	2.44	2.11	1.72
		38 × 140	4.67	4.04	3.30	3.95	3.42	2.79	3.48	3.01	2.46
		38 × 184	5.68	4.92	4.02	4.80	4.16	3.40	4.23	3.67	2.99
		38 × 235	6.95	6.02	4.91	5.87	5.08	4.15	5.18	4.48	3.66
		38 × 286	8.06	6.98	5.70	6.81	5.90	4.82	6.01	5.20	4.25
	Construction	38 × 89	3.17	2.88	2.51	2.77	2.51	2.14	2.51	2.28	1.89
	Standard	38 × 89	2.68	2.32	1.90	2.27	1.96	1.60	2.00	1.73	1.41
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	Select	38 × 89	3.22	2.92	2.55	2.81	2.55	2.23	2.55	2.32	2.03
	Structural	38 × 140	5.06	4.60	4.02	4.42	4.02	3.51	4.02	3.65	3.19
		38 × 184	6.65	6.05	5.28	5.81	5.28	4.61	5.28	4.80	4.19
		38 × 235	8.50	7.72	6.74	7.42	6.74	5.89	6.74	6.13	5.35
		38 × 286	10.34	9.40	8.21	9.03	8.21	7.17	8.21	7.46	6.52
	No. 1 and	38 × 89	3.11	2.83	2.47	2.72	2.47	2.16	2.47	2.24	1.96
	No. 2	38 × 140	4.90	4.45	3.89	4.28	3.89	3.40	3.89	3.53	3.08
		38 × 184	6.44	5.85	5.11	5.62	5.11	4.41	5.11	4.64	3.89
		38 × 235	8.22	7.47	6.38	7.18	6.52	5.39	6.52	5.82	4.75
		38 × 286	10.00	9.06	7.40	8.74	7.66	6.25	7.80	6.76	5.52
	No. 3	38 × 89	3.06	2.78	2.31	2.67	2.39	1.95	2.43	2.11	1.72
		38 × 140	4.67	4.04	3.30	3.95	3.42	2.79	3.48	3.01	2.46
		38 × 184	5.68	4.92	4.02	4.80	4.16	3.40	4.23	3.67	2.99
		38 × 235	6.95	6.02	4.91	5.87	5.08	4.15	5.18	4.48	3.66
		38 × 286	8.06	6.98	5.70	6.81	5.90	4.82	6.01	5.20	4.25
	Construction	38 × 89	3.06	2.78	2.43	2.67	2.43	2.12	2.43	2.20	1.93
	Standard	38 × 89	2.78	2.41	1.97	2.35	2.04	1.66	2.07	1.79	1.47
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules)	Select	38 × 89	2.88	2.61	2.28	2.51	2.28	1.99	2.28	2.07	1.81
	Structural	38 × 140	4.53	4.11	3.59	3.95	3.59	3.14	3.59	3.26	2.85
		38 × 184	5.95	5.40	4.72	5.20	4.72	4.12	4.72	4.29	3.68
		38 × 235	7.60	6.90	6.03	6.64	6.03	5.11	6.03	5.48	4.51
		38 × 286	9.25	8.40	7.01	8.08	7.26	5.93	7.34	6.40	5.23
	No. 1 and	38 × 89	2.81	2.55	2.23	2.46	2.23	1.95	2.23	2.03	1.77
	No. 2	38 × 140	4.42	4.02	3.44	3.86	3.51	2.91	3.51	3.14	2.56
		38 × 184	5.81	5.13	4.19	5.00	4.33	3.54	4.41	3.82	3.12
		38 × 235	7.24	6.27	5.12	6.12	5.30	4.33	5.40	4.67	3.82
		38 × 286	8.40	7.27	5.94	7.10	6.15	5.02	6.26	5.42	4.43
	No. 3	38 × 89	2.62	2.27	1.85	2.22	1.92	1.57	1.95	1.69	1.38
		38 × 140	3.74	3.24	2.65	3.16	2.74	2.24	2.79	2.42	1.97
		38 × 184	4.56	3.94	3.22	3.85	3.33	2.72	3.40	2.94	2.40
		38 × 235	5.57	4.82	3.94	4.71	4.08	3.33	4.15	3.60	2.94
		38 × 286	6.46	5.60	4.57	5.46	4.73	3.86	4.82	4.17	3.41
	Construction	38 × 89	2.74	2.49	2.11	2.40	2.18	1.90	2.18	1.93	1.57
	Standard	38 × 89	2.22	1.93	1.57	1.88	1.63	1.33	1.66	1.44	1.17

Table A-7 Maximum Spans for Roof Rafters – Specified Roof Snow Loads 2.5 and 3.0 kPa Forming Part of Sentence 9.23.4.2.(1)


Column 1	Column 2	Column 3	Column 4	Column 5	Column 6	Column 7	Column 8	Column 9
Commercial Designation	Grade	Rafter Size, mm	Maximum Span, m
			Specified Snow Load, kPa
			2.5			3.0
			Rafter Spacing, mm			Rafter Spacing, mm
			300	400	600	300	400	600
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	Select	38 × 89	2.51	2.28	1.99	2.37	2.15	1.88
	Structural	38 × 140	3.95	3.59	3.14	3.72	3.38	2.95
		38 × 184	5.20	4.72	4.12	4.89	4.44	3.83
		38 × 235	6.64	6.03	5.08	6.24	5.67	4.68
		38 × 286	8.08	7.23	5.90	7.60	6.65	5.43
	No. 1 and	38 × 89	2.41	2.19	1.86	2.27	2.06	1.71
	No. 2	38 × 140	3.76	3.26	2.66	3.46	3.00	2.45
		38 × 184	4.58	3.96	3.24	4.21	3.65	2.98
		38 × 235	5.60	4.85	3.96	5.15	4.46	3.64
		38 × 286	6.50	5.63	4.59	5.98	5.17	4.23
	No. 3	38 × 89	1.79	1.55	1.26	1.64	1.42	1.16
		38 × 140	2.55	2.21	1.80	2.35	2.03	1.66
		38 × 184	3.10	2.69	2.20	2.86	2.47	2.02
		38 × 235	3.80	3.29	2.68	3.49	3.02	2.47
		38 × 286	4.41	3.82	3.12	4.05	3.51	2.87
	Construction	38 × 89	2.30	2.00	1.63	2.12	1.84	1.50
	Standard	38 × 89	1.73	1.50	1.22	1.59	1.38	1.12
Hem – Fir (includes Western Hemlock and Amabilis Fir)	Select	38 × 89	2.48	2.25	1.97	2.33	2.12	1.85
	Structural	38 × 140	3.90	3.54	3.10	3.67	3.33	2.91
		38 × 184	5.13	4.66	4.07	4.82	4.38	3.77
		38 × 235	6.55	5.95	5.01	6.16	5.60	4.61
		38 × 286	7.97	7.12	5.81	7.50	6.55	5.34
	No. 1 and	38 × 89	2.41	2.19	1.91	2.27	2.06	1.80
	No. 2	38 × 140	3.79	3.42	2.79	3.57	3.14	2.57
		38 × 184	4.80	4.16	3.40	4.42	3.83	3.12
		38 × 235	5.87	5.08	4.15	5.40	4.68	3.82
		38 × 286	6.81	5.90	4.82	6.27	5.43	4.43
	No. 3	38 × 89	2.21	1.91	1.56	2.03	1.76	1.43
		38 × 140	3.15	2.73	2.23	2.90	2.51	2.05
		38 × 184	3.83	3.32	2.71	3.52	3.05	2.49
		38 × 235	4.68	4.06	3.31	4.31	3.73	3.05
		38 × 286	5.53	4.71	3.84	5.00	4.33	3.54
	Commercial	38 × 89	2.33	2.09	1.71	2.20	1.93	1.57
	Standard	38 × 89	1.81	1.57	1.28	1.66	1.44	1.18
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	Select	38 × 89	2.37	2.15	1.88	2.23	2.03	1.77
	Structural	38 × 140	3.73	3.39	2.96	3.51	3.19	2.79
		38 × 184	4.90	4.45	3.89	4.61	4.19	3.66
		38 × 235	6.26	5.69	4.97	5.89	5.35	4.68
		38 × 286	7.62	6.92	5.90	7.17	6.52	5.43
	No. 1 and	38 × 89	2.29	2.08	1.82	2.16	1.96	1.71
	No. 2	38 × 140	3.61	3.28	2.86	3.40	3.08	2.66
		38 × 184	4.74	4.31	3.52	4.46	3.96	3.23
		38 × 235	6.06	5.27	4.30	5.59	4.84	3.96
		38 × 286	7.06	6.11	4.99	6.49	5.62	4.59
	No. 3	38 × 89	2.21	1.91	1.56	2.03	1.76	1.43
		38 × 140	3.15	2.73	2.23	2.90	2.51	2.05
		38 × 184	3.83	3.32	2.71	3.52	3.05	2.49
		38 × 235	4.68	4.06	3.31	4.31	3.73	3.05
		38 × 286	5.43	4.71	3.84	5.00	4.33	3.54
	Construction	38 × 89	2.25	2.05	1.77	2.12	1.93	1.63
	Standard	38 × 89	1.87	1.62	1.33	1.72	1.49	1.22
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules)	Select	38 × 89	2.12	1.93	1.68	1.99	1.81	1.58
	Structural	38 × 140	3.33	3.03	2.65	3.14	2.85	2.49
		38 × 184	4.38	3.98	3.33	4.12	3.75	3.07
		38 × 235	5.60	4.99	4.08	5.27	4.59	3.75
		38 × 286	6.69	5.79	4.73	6.15	5.33	4.35
	No. 1 and	38 × 89	2.07	1.88	1.62	1.95	1.77	1.49
	No. 2	38 × 140	3.26	2.84	2.32	3.02	2.61	2.13
		38 × 184	3.99	3.46	2.82	3.67	3.18	2.60
		38 × 235	4.88	4.23	3.45	4.49	3.89	3.17
		38 × 286	5.66	4.90	4.00	5.21	4.51	3.68
	No. 3	38 × 89	1.77	1.53	1.25	1.63	1.41	1.15
		38 × 140	2.52	2.19	1.78	2.32	2.01	1.64
		38 × 184	3.07	2.66	2.17	2.82	2.45	2.00
		38 × 235	3.76	3.25	2.66	3.45	2.99	2.44
		38 × 286	4.36	3.77	3.08	4.01	3.47	2.83
	Construction	38 × 89	2.01	1.74	1.42	1.85	1.60	1.31
	Standard	38 × 89	1.50	1.30	1.06	1.38	1.19	0.98

Table A-8 Maximum Spans for Built-up Floor Beams Supporting not more than One Floor(1)(2) Forming Part of Sentence 9.23.4.2.(3)


Column 1	Column 2	Column 3	Col. 4	Col. 5	Col. 6	Col. 7	Col. 8	Col. 9		Col. 10	Col. 11	Col. 12
Commercial Designation	Grade	Supported Length, mm⁽³⁾⁽⁴⁾	Maximum Span, m⁽⁵⁾⁽⁶⁾
			Size of Built-up Beam, mm
			3 – 38 ×184	4 – 38 × 184	5 – 38 × 184	3 – 38 × 235	4 – 38 × 235	5 – 38 × 235	3 – 38 × 286		4 – 38 × 286	5 – 38 × 286
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	Select	2.4	3.36	3.70	3.99	4.30	4.73	5.09	5.23		5.66	5.99
	Structural	3.0	3.12	3.44	3.70	3.99	4.39	4.73	4.84		5.34	5.66
		3.6	2.94	3.23	3.48	3.75	4.13	4.45	4.41		5.03	5.41
		4.2	2.79	3.07	3.31	3.52	3.92	4.23	4.09		4.72	5.14
		4.8	2.67	2.94	3.17	3.29	3.75	4.04	3.82		4.41	4.92
		5.4	2.54	2.83	3.04	3.11	3.59	3.89	3.60		4.16	4.65
		6.0	2.41	2.73	2.94	2.95	3.40	3.75	3.42		3.95	4.41
	No. 1 and	2.4	2.97	3.42	3.82	3.63	4.19	4.68	4.21		4.86	5.43
	No. 2	3.0	2.65	3.06	3.42	3.24	3.75	4.19	3.76		4.35	4.86
		3.6	2.42	2.80	3.13	2.96	3.42	3.82	3.44		3.97	4.44
		4.2	2.24	2.59	2.89	2.74	3.17	3.54	3.18		3.67	4.11
		4.8	2.10	2.42	2.71	2.56	2.96	3.31	2.98		3.44	3.84
		5.4	1.98	2.28	2.55	2.42	2.79	3.12	2.81		3.24	3.62
		6.0	1.88	2.17	2.42	2.29	2.65	2.96	2.66		3.07	3.44
Hem – Fir (includes Western Hemlock and Amabilis Fir)	Select	2.4	3.32	3.65	3.93	4.24	4.66	5.03	5.16		5.61	5.93
	Structural	3.0	3.08	3.39	3.65	3.93	4.33	4.66	4.76		5.27	5.61
		3.6	2.90	3.19	3.44	3.70	4.08	4.39	4.35		4.96	5.34
		4.2	2.75	3.03	3.27	3.47	3.87	4.17	4.02		4.65	5.07
		4.8	2.63	2.90	3.12	3.24	3.70	3.99	3.66		4.35	4.85
		5.4	2.49	2.79	3.00	2.95	3.53	3.83	3.32		4.10	4.58
		6.0	2.28	2.69	2.90	2.70	3.35	3.70	3.04		3.87	4.35
	No. 1 and	2.4	3.11	3.55	3.82	3.80	4.39	4.88	4.41		5.10	5.70
	No. 2	3.0	2.78	3.21	3.55	3.40	3.93	4.39	3.95		4.56	5.10
		3.6	2.54	2.93	3.28	3.11	3.59	4.01	3.60		4.16	4.65
		4.2	2.35	2.72	3.04	2.88	3.32	3.71	3.34		3.85	4.31
		4.8	2.20	2.54	2.84	2.69	3.11	3.47	3.12		3.60	4.03
		5.4	2.07	2.39	2.68	2.54	2.93	3.27	2.94		3.40	3.80
		6.0	1.97	2.27	2.54	2.41	2.78	3.11	2.79		3.22	3.60
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	Select	2.4	3.17	3.49	3.76	4.05	4.46	4.81	4.93		5.42	5.73
	Structural	3.0	2.95	3.24	3.49	3.76	4.14	4.46	4.58		5.04	5.42
		3.6	2.77	3.05	3.29	3.54	3.90	4.20	4.31		4.74	5.11
		4.2	2.63	2.90	3.12	3.36	3.70	3.99	4.09		4.51	4.85
		4.8	2.52	2.77	2.99	3.22	3.54	3.81	3.82		4.31	4.64
		5.4	2.42	2.67	2.87	3.09	3.41	3.67	3.60		4.14	4.46
		6.0	2.34	2.57	2.77	2.95	3.29	3.54	3.32		3.95	4.31
	No. 1 and	2.4	3.07	3.38	3.64	3.92	4.32	4.65	4.57		5.25	5.59
	No. 2	3.0	2.85	3.14	3.38	3.52	4.01	4.32	4.09		4.72	5.25
		3.6	2.63	2.95	3.18	3.22	3.71	4.06	3.73		4.31	4.82
		4.2	2.44	2.80	3.02	2.98	3.44	3.84	3.46		3.99	4.46
		4.8	2.28	2.63	2.89	2.79	3.22	3.60	3.23		3.73	4.17
		5.4	2.15	2.48	2.77	2.63	3.03	3.39	3.05		3.52	3.93
		6.0	2.04	2.35	2.63	2.49	2.88	3.22	2.89		3.34	3.73
Northern Species (includes any Canadian species covered by the NLGA Standard GradingRules)	Select	2.4	2.84	3.12	3.36	3.62	3.99	4.30	4.33		4.85	5.23
	Structural	3.0	2.63	2.90	3.12	3.34	3.70	3.99	3.88		4.47	4.85
		3.6	2.48	2.73	2.94	3.05	3.48	3.75	3.54		4.08	4.57
		4.2	2.31	2.59	2.79	2.82	3.26	3.57	3.28		3.78	4.23
		4.8	2.16	2.48	2.67	2.64	3.05	3.41	3.06		3.54	3.96
		5.4	2.04	2.35	2.57	2.49	2.87	3.21	2.89		3.34	3.73
		6.0	1.93	2.23	2.48	2.36	2.73	3.05	2.74		3.16	3.54
	No. 1 and	2.4	2.59	2.99	3.29	3.16	3.65	4.08	3.67		4.24	4.74
	No. 2	3.0	2.31	2.67	2.99	2.83	3.27	3.65	3.28		3.79	4.24
		3.6	2.11	2.44	2.73	2.58	2.98	3.33	3.00		3.46	3.87
		4.2	1.95	2.26	2.52	2.39	2.76	3.09	2.77		3.20	3.58
		4.8	1.83	2.11	2.36	2.24	2.58	2.89	2.59		3.00	3.35
		5.4	1.72	1.99	2.23	2.11	2.43	2.72	2.45		2.82	3.16
		6.0	1.64	1.89	2.11	2.00	2.31	2.58	2.32		2.68	3.00

Notes to Table A-8:

⁽¹⁾ Beam spans apply only where the floors serve residential areas as described in Table 4.1.5.3.v1, or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.5.3.v1

⁽²⁾ When the floors have a concrete topping of not more than 51 mm, the spans must be multiplied by 0.8

⁽³⁾ Supported length means half the sum of the joists spans on both sides of the beam.

⁽⁴⁾ Straight interpolation may be used for other supported lengths.

⁽⁵⁾ Spans are clear spans between supports. For total span, add two bearing lengths.

⁽⁶⁾ 3-ply beams with supported lengths greater than 4.2 m require minimum bearing length of 114 mm. All other beams require minimum bearing length of 76 mm.

Table A-9 Maximum Spans for Built-up Floor Beams Supporting not more than Two Floors(1)(2) Forming Part of Sentence 9.23.4.2.(3)

Column 1	Column 2	Column 3	Col. 4	Col. 5	Col. 6	Col. 7	Col. 8	Col. 9	Col. 10	Col. 11	Col. 12
Commercial Designation	Grade	Supported Length, mm⁽³⁾⁽⁴⁾	Maximum Span, m⁽⁵⁾⁽⁶⁾
			Size of Built-up Beam, mm
			3 – 38 × 184	4 – 38 × 184	5 – 38 × 184	3 – 38 × 235	4 – 38 × 235	5 – 38 × 235	3 – 38 × 286	4 – 38 × 286	5 – 38 × 286
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	Select	2.4	2.80	3.08	3.32	3.49	3.93	4.24	4.05	4.67	5.16
	Structural	3.0	2.55	2.86	3.08	3.12	3.60	3.93	3.62	4.18	4.67
		3.6	2.33	2.69	2.90	2.85	3.29	3.68	3.30	3.82	4.27
		4.2	2.16	2.49	2.75	2.64	3.04	3.40	2.99	3.53	3.95
		4.8	2.00	2.33	2.60	2.38	2.85	3.18	2.69	3.30	3.69
		5.4	1.82	2.20	2.45	2.17	2.68	3.00	2.45	3.08	3.48
		6.0	1.67	2.08	2.33	2.00	2.51	2.85	2.26	2.83	3.30
	No. 1 and	2.4	2.22	2.56	2.87	2.72	3.14	3.51	3.15	3.64	4.07
	No.2	3.0	1.99	2.29	2.56	2.43	2.80	3.14	2.82	3.25	3.64
		3.6	1.81	2.09	2.34	2.22	2.56	2.86	2.57	2.97	3.32
		4.2	1.68	1.94	2.17	2.05	2.37	2.65	2.38	2.75	3.07
		4.8	1.57	1.81	2.03	1.92	2.22	2.48	2.23	2.57	2.88
		5.4	1.48	1.71	1.91	1.81	2.09	2.34	2.10	2.43	2.71
		6.0	1.40	1.62	1.81	1.72	1.98	2.22	1.99	2.30	2.57
Hem – Fir (includes Western Hemlock and Amabilis Fir)	Select	2.4	2.76	3.04	3.27	3.43	3.88	4.18	3.99	4.60	5.09
	Structural	3.0	2.51	2.82	3.04	2.97	3.55	3.88	3.34	4.12	4.60
		3.6	2.15	2.65	2.86	2.56	3.24	3.62	2.88	3.65	4.20
		4.2	1.90	2.40	2.72	2.26	2.85	3.35	2.55	3.21	3.87
		4.8	1.70	2.15	2.56	2.03	2.56	3.08	2.30	2.88	3.46
		5.4	1.56	1.95	2.35	1.86	2.32	2.79	2.11	2.62	3.14
		6.0	1.44	1.79	2.15	1.72	2.14	2.56	1.96	2.42	2.88
	No. 1 and	2.4	2.33	2.69	3.01	2.85	3.29	3.68	3.30	3.82	4.27
	No.2	3.0	2.08	2.41	2.69	2.55	2.94	3.29	2.96	3.41	3.82
		3.6	1.90	2.20	2.45	2.33	2.68	3.00	2.70	3.12	3.48
		4.2	1.76	2.03	2.27	2.15	2.49	2.78	2.50	2.88	3.22
		4.8	1.65	1.90	2.13	2.01	2.33	2.60	2.30	2.70	3.02
		5.4	1.55	1.79	2.00	1.86	2.19	2.45	2.11	2.54	2.84
		6.0	1.44	1.70	1.90	1.72	2.08	2.33	1.96	2.41	2.70
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	Select	2.4	2.64	2.91	3.13	3.37	3.71	4.00	4.05	4.52	4.87
	Structural	3.0	2.45	2.70	2.91	3.12	3.45	4.71	3.62	4.18	4.52
		3.6	2.31	2.54	2.73	2.79	3.24	3.49	3.14	3.82	4.25
		4.2	2.07	2.41	2.60	2.46	3.04	3.32	2.77	3.50	3.95
		4.8	1.85	2.31	2.48	2.21	2.79	3.17	2.50	3.14	3.69
		5.4	1.69	2.13	2.39	2.02	2.53	3.00	2.28	2.85	3.42
		6.0	1.56	1.95	2.31	1.86	2.32	2.79	2.11	2.62	3.14
	No. 1 and	2.4	2.41	2.79	3.03	2.95	3.41	3.81	3.42	3.95	4.42
	No.2	3.0	2.16	2.49	2.79	2.64	3.05	3.41	3.06	3.53	3.95
		3.6	1.97	2.27	2.54	2.41	2.78	3.11	2.79	3.23	3.61
		4.2	1.82	2.11	2.35	2.23	2.57	2.88	2.59	2.99	3.34
		4.8	1.71	1.97	2.20	2.09	2.41	2.69	2.42	2.79	3.12
		5.4	1.61	1.86	2.08	1.97	2.27	2.54	2.28	2.63	2.95
		6.0	1.53	1.76	1.97	1.86	2.15	2.41	2.11	2.50	2.79
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules)	Select	2.4	2.29	2.60	2.80	2.80	3.23	3.57	3.24	3.75	4.19
	Structural	3.0	2.04	2.36	2.60	2.50	2.89	3.23	2.90	3.35	3.75
		3.6	1.87	2.16	2.41	2.28	2.64	2.95	2.65	3.06	3.42
		4.2	1.73	2.00	2.23	2.11	2.44	2.73	2.45	2.83	3.17
		4.8	1.62	1.87	2.09	1.98	2.28	2.55	2.29	2.65	2.96
		5.4	1.52	1.76	1.97	1.86	2.15	2.41	2.11	2.50	2.79
		6.0	1.44	1.67	1.87	1.72	2.04	2.28	1.96	2.37	2.65
	No. 1 and	2.4	1.94	2.24	2.50	2.37	2.73	3.06	2.75	3.17	3.55
	No.2	3.0	1.73	2.00	2.24	2.12	2.44	2.73	2.46	2.84	3.17
		3.6	1.58	1.83	2.04	1.93	2.23	2.50	2.24	2.59	2.90
		4.2	1.46	1.69	1.89	1.79	2.07	2.31	2.08	2.40	2.68
		4.8	1.37	1.58	1.77	1.67	1.93	2.16	1.94	2.24	2.51
		5.4	1.29	1.49	1.67	1.58	1.82	2.04	1.83	2.11	2.36
		6.0	1.22	1.41	1.58	1.50	1.73	1.93	1.74	2.01	2.24

Notes to Table A-9:

⁽²⁾ When the floors have a concrete topping of not more than 51 mm, the spans must be multiplied by 0.8

⁽³⁾ Supported length means half the sum of the joists spans on both sides of the beam.

⁽⁴⁾ Straight interpolation may be used for other supported lengths.

⁽⁵⁾ Spans are clear spans between supports. For total span, add two bearing lengths.

⁽⁶⁾ 3-ply beams require minimum bearing length of 114 mm. 4-ply and 5-ply beams with supported lengths greater than 3 m require minimum bearing length of 114 mm. All other beams require minimum bearing length of 76 mm.

Table A-10 Maximum Spans for Built-up Floor Beams Supporting not more than Three Floors(1)(2) Forming Part of Sentence 9.23.4.2.(3)

Column 1	Column 2	Column 3	Col. 4	Col. 5	Col. 6	Col. 7	Col. 8	Col. 9	Col. 10	Col. 11	Col. 12
Commercial Designation	Grade	Supported Length, mm⁽³⁾⁽⁴⁾	Maximum Span, m⁽⁵⁾⁽⁶⁾
			Size of Built-up Beam, mm
			3 – 38 × 184	4 – 38 × 184	5 – 38 × 184	3 – 38 × 235	4 – 38 × 235	5 – 38 × 235	3 – 38 × 286	4 – 38 × 286	5 – 38 × 286
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	Select	2.4	2.38	2.74	2.95	2.91	3.36	3.75	3.37	3.89	4.35
	Structural	3.0	2.13	2.46	2.74	2.60	3.00	3.36	2.92	3.48	3.89
		3.6	1.88	2.24	2.51	2.24	2.74	3.06	2.53	3.18	3.56
		4.2	1.66	2.08	2.32	1.99	2.49	2.84	2.25	2.81	3.29
		4.8	1.50	1.88	2.17	1.80	2.24	2.65	2.04	2.53	3.02
		5.4	1.38	1.71	2.05	1.65	2.04	2.44	1.88	2.31	2.75
		6.0	1.28	1.58	1.88	1.53	1.89	2.24	1.75	2.14	2.53
	No. 1 and	2.4	1.85	2.14	2.39	2.26	2.61	2.92	2.63	3.03	3.39
	No.2	3.0	1.66	1.91	2.14	2.02	2.34	2.61	2.35	2.71	3.03
		3.6	1.51	1.74	1.95	1.85	2.13	2.39	2.14	2.48	2.77
		4.2	1.40	1.62	1.81	1.71	1.98	2.21	1.99	2.29	2.56
		4.8	1.31	1.51	1.69	1.60	1.85	2.07	1.86	2.14	2.40
		5.4	1.23	1.42	1.59	1.51	1.74	1.95	1.75	2.02	2.26
		6.0	1.17	1.35	1.51	1.43	1.65	1.85	1.66	1.92	2.14
Hem – Fir (includes Western Hemlock and Amabilis Fir)	Select	2.4	2.22	2.70	2.91	2.64	3.31	3.70	2.98	3.78	4.29
	Structural	3.0	1.85	2.35	2.70	2.21	2.79	3.31	2.50	3.14	3.78
		3.6	1.61	2.02	2.43	1.92	2.40	2.89	2.18	2.71	3.24
		4.2	1.43	1.78	2.14	1.71	2.13	2.54	1.95	2.40	2.86
		4.8	1.30	1.61	1.92	1.56	1.92	2.28	1.77	2.18	2.58
		5.4	1.19	1.47	1.74	1.44	1.76	2.08	1.64	2.00	2.35
		6.0	1.11	1.36	1.61	1.34	1.63	1.92	1.53	1.85	2.18
	No. 1 and	2.4	1.94	2.24	2.51	2.37	2.74	3.06	2.75	3.18	3.56
	No.2	3.0	1.74	2.00	2.24	2.12	2.45	2.74	2.46	2.84	3.18
		3.6	1.58	1.83	2.05	1.92	2.24	2.50	2.18	2.60	2.90
		4.2	1.43	1.69	1.89	1.71	2.07	2.32	1.95	2.40	2.69
		4.8	1.30	1.58	1.77	1.56	1.92	2.17	1.77	2.18	2.51
		5.4	1.19	1.47	1.67	1.44	1.76	2.04	1.64	2.00	2.35
		6.0	1.11	1.36	1.58	1.34	1.63	1.92	1.53	1.85	2.18
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	Select	2.4	2.35	2.58	2.78	2.89	3.30	3.55	3.24	3.89	4.33
	Structural	3.0	2.02	2.40	2.58	2.40	3.00	3.30	2.71	3.42	3.89
		3.6	1.74	2.20	2.43	2.08	2.62	3.06	2.35	2.95	3.54
		4.2	1.55	1.94	2.31	1.85	2.31	2.77	2.10	2.61	3.12
		4.8	1.40	1.74	2.09	1.68	2.08	2.48	1.91	2.35	2.80
		5.4	1.28	1.59	1.90	1.54	1.90	2.26	1.76	2.16	2.55
		6.0	1.19	1.47	1.74	1.44	1.76	2.08	1.64	2.00	2.35
	No. 1 and	2.4	2.01	2.32	2.60	2.46	2.84	3.17	2.85	3.29	3.68
	No.2	3.0	1.80	2.08	2.32	2.20	2.54	2.84	2.55	2.95	3.29
		3.6	1.64	1.90	2.12	2.01	2.32	2.59	2.33	2.69	3.01
		4.2	1.52	1.75	2.96	1.85	2.15	2.40	2.10	2.49	2.78
		4.8	1.40	1.64	1.84	1.68	2.01	2.24	1.91	2.33	2.60
		5.4	1.28	1.55	1.73	1.54	1.89	2.12	1.76	2.16	2.46
		6.0	1.19	1.47	1.64	1.44	1.76	2.01	1.64	2.00	2.33
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules)	Select	2.4	1.91	2.20	2.46	2.33	2.69	3.01	2.70	3.12	3.49
	Structural	3.0	1.70	1.97	2.20	2.08	2.41	2.69	2.42	2.79	3.12
		3.6	1.56	1.80	2.01	1.90	2.20	2.46	2.18	2.55	2.85
		4.2	1.43	1.66	1.86	1.71	2.03	2.27	1.95	2.36	2.64
		4.8	1.30	1.56	1.74	1.56	1.90	2.13	1.77	2.18	2.47
		5.4	1.19	1.47	1.64	1.44	1.76	2.01	1.64	2.00	2.33
		6.0	1.11	1.36	1.56	1.34	1.63	1.90	1.53	1.85	2.18
	No. 1 and	2.4	1.61	1.86	2.08	1.97	2.28	2.55	2.29	2.64	2.96
	No.2	3.0	1.44	1.67	1.86	1.76	2.04	2.28	2.05	2.36	2.64
		3.6	1.32	1.52	1.70	1.61	1.86	2.08	1.87	2.16	2.41
		4.2	1.22	1.41	1.57	1.49	1.72	1.93	1.73	2.00	2.23
		4.8	1.14	1.32	1.47	1.40	1.61	1.80	1.62	1.87	2.09
		5.4	1.08	1.24	1.39	1.32	1.52	1.70	1.53	1.76	1.97
		6.0	1.02	1.18	1.32	1.25	1.44	1.61	1.45	1.67	1.87

Notes to Table A-10:

⁽²⁾ When the floors have a concrete topping of not more than 51 mm, the spans must be multiplied by 0.8

⁽³⁾ Supported length means half the sum of the joists spans on both sides of the beam.

⁽⁴⁾ Straight interpolation may be used for other supported lengths.

⁽⁵⁾ Spans are clear spans between supports. For total span, add two bearing lengths.

⁽⁶⁾ 3-ply beams with supported lengths greater than 4.2 m require minimum bearing length of 152 mm. All other beams require minimum bearing length of 114 mm.

Table A-11 Maximum Spans for Glue-Laminated Floor Beams – 20f-E Grade(1) Forming Part of Sentence 9.23.4.2.(3)


Column 1	Column 2	Column 3	Col. 4	Col. 5	Col. 6	Col. 7	Col. 8	Col. 9	Col. 10
Number of Storeys Supported	Beam Width, mm	Supported Length, m⁽²⁾⁽³⁾	Maximum Span, m^(4)(5)(6)(7)
			Beam Depth, mm
			228	266	304	342	380	418	456
1	80	2.4	4.32	5.04	5.76	6.48	7.20	7.92	8.64
		3.0	3.87	4.51	5.15	5.80	6.44	7.09	7.73
		3.6	3.53	4.12	4.70	5.29	5.88	6.47	7.06
		4.2	3.27	3.81	4.36	4.90	5.44	5.99	6.53
		4.8	3.06	3.57	4.07	4.58	5.09	5.60	6.11
		5.4	2.88	3.36	3.84	4.32	4.80	5.28	5.76
		6.0	2.73	3.19	3.64	4.10	4.56	5.01	5.47
	130	2.4	5.51	6.43	7.35	8.26	9.18	10.10	11.02
		3.0	4.93	5.75	6.57	7.39	8.21	9.03	9.86
		3.6	4.50	5.25	6.00	6.75	7.50	8.25	9.00
		4.2	4.16	4.86	5.55	6.25	6.94	7.64	8.33
		4.8	3.90	4.54	5.19	5.84	6.49	7.14	7.79
		5.4	3.67	4.28	4.90	5.51	6.12	6.73	7.35
		6.0	3.48	4.07	4.65	5.23	5.81	6.39	6.97
2	80	2.4	3.28	3.83	4.37	4.92	5.47	6.01	6.56
		3.0	2.93	3.42	3.91	4.40	4.89	5.38	5.87
		3.6	2.68	3.12	3.57	4.02	4.46	4.91	5.36
		4.2	2.48	2.89	3.31	3.72	4.13	4.54	4.96
		4.8	2.32	2.71	3.09	3.48	3.86	4.25	4.64
		5.4	2.19	2.55	2.91	3.28	3.64	4.01	4.37
		6.0	2.07	2.42	2.77	3.11	3.46	3.80	4.15
	130	2.4	4.18	4.88	5.57	6.27	6.97	7.66	8.36
		3.0	3.74	4.36	4.99	5.61	6.23	6.85	7.48
		3.6	3.41	3.98	4.55	5.12	5.69	6.26	6.83
		4.2	3.16	3.69	4.21	4.74	5.27	5.79	6.32
		4.8	2.96	3.45	3.94	4.43	4.93	5.42	5.91
		5.4	2.79	3.25	3.72	4.18	4.64	5.11	5.57
		6.0	2.64	3.08	3.53	3.97	4.41	4.85	5.29
3	80	2.4	2.75	3.21	3.66	4.12	4.58	5.04	5.50
		3.0	2.46	2.87	3.28	3.69	4.10	4.51	4.92
		3.6	2.24	2.62	2.99	3.37	3.74	4.11	4.49
		4.2	2.08	2.42	2.77	3.12	3.46	3.81	4.15
		4.8	1.94	2.27	2.59	2.91	3.24	3.56	3.89
		5.4	1.83	2.14	2.44	2.75	3.05	3.36	3.66
		6.0	1.74	2.03	2.32	2.61	2.90	3.19	3.48
	130	2.4	3.50	4.09	4.67	5.25	5.84	6.42	7.01
		3.0	3.13	3.66	4.18	4.70	5.22	5.74	6.27
		3.6	2.86	3.34	3.81	4.29	4.77	5.24	5.72
		4.2	2.65	3.09	3.53	3.97	4.41	4.85	5.30
		4.8	2.48	2.89	3.30	3.72	4.13	4.54	4.95
		5.4	2.34	2.72	3.11	3.50	3.89	4.28	4.67
		6.0	2.22	2.58	2.95	3.32	3.69	4.06	4.43

Notes to Table A-11:

⁽²⁾Supported length means half the sum of the joist spans on both sides of the beam.

⁽³⁾Straight interpolation may be used for other supported lengths.

⁽⁴⁾Spans are valid for glued-laminated timber conforming to CAN/CSA-O122-M and CAN/CSA-O177-M.

⁽⁵⁾Spans are clear spans between supports. For total span, add two bearing lengths.

⁽⁶⁾Provide a minimum bearing length of 89 mm. (Alternatively, the bearing length may be designed in accordance with Part 4.)

⁽⁷⁾Top edge of beam assumed to be fully laterally supported by joists.

Table A-12 Maximum Spans for Built-up Ridge Beams and Lintels Supporting the Roof and Ceiling Only – No. 1 or No. 2 Grade Forming Part of Sentence 9.23.4.2.(4)


Column 1	Column 2	Column 3	Column 4	Column 5	Column 6	Column 7
Commercial Designation	Beam or Lintel Size, mm	Maximum Span, m^(1)(2)(3)
		Specified Snow Load, kPa
		1.0	1.5	2.0	2.5	3.0
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	3 – 38 × 184	2.65	2.28	2.03	1.85	1.71
	4 – 38 × 184	3.06	2.64	2.35	2.14	1.97
	5 – 38 × 184	3.43	2.95	2.62	2.39	2.21
	3 – 38 × 235	3.25	2.79	2.49	2.26	2.09
	4 – 38 × 235	3.75	3.22	2.87	2.61	2.41
	5 – 38 × 235	4.19	3.60	3.21	2.92	2.70
	3 – 38 × 286	3.77	3.24	2.88	2.62	2.43
	4 – 38 × 286	4.35	3.74	3.33	3.03	2.80
	5 – 38 × 286	4.86	4.18	3.72	3.39	3.13
Hem – Fir (includes Western Hemlock and Amabilis Fir)	3 – 38 × 184	2.78	2.39	2.13	1.94	1.79
	4 – 38 × 184	3.21	2.76	2.46	2.24	2.07
	5 – 38 × 184	3.59	3.09	2.75	2.50	2.31
	3 – 38 × 235	3.40	2.93	2.61	2.37	2.19
	4 – 38 × 235	3.93	3.38	3.01	2.74	2.53
	5 – 38 × 235	4.39	3.78	3.36	3.06	2.83
	3 – 38 × 286	3.95	3.40	3.02	2.75	2.54
	4 – 38 × 286	4.56	3.92	3.49	3.18	2.94
	5 – 38 × 286	5.10	4.38	3.90	3.55	3.28
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	3 – 38 × 184	2.88	2.48	2.21	2.01	1.86
	4 – 38 × 184	3.30	2.86	2.55	2.32	2.14
	5 – 38 × 184	3.55	3.10	2.82	2.59	2.40
	3 – 38 × 235	3.53	3.03	2.70	2.46	2.27
	4 – 38 × 235	4.07	3.50	3.12	2.84	2.62
	5 – 38 × 235	4.54	3.91	3.49	3.17	2.93
	3 – 38 × 286	4.09	3.52	3.13	2.85	2.63
	4 – 38 × 286	4.72	4.06	3.62	3.29	3.04
	5 – 38 × 286	5.28	4.54	4.04	3.68	3.40

Notes to Table A-12:

⁽¹⁾Beam and lintel spans are calculated based on a maximum supported length of 4.9 m. Spans may be increased by 5% for supported lengths of not more than 4.3 m, by 10% for supported lengths of not more than 3.7 m, and by 25% for supported lengths of not more than 2.4 m.

⁽²⁾For ridge beams, supported length means half the sum of the rafter, joist or truss spans on both sides of the beam. For lintels, supported length means half the sum of truss, roof joist or rafter spans supported by the lintel plus the length of the overhang beyond the lintel.

⁽³⁾Provide a minimum bearing length of 76 mm.

9.23.4.3. — Steel Beams

(1) The spans for steel beams with laterally supported top flanges shall conform to Table 9.23.4.3. for floors and Tables A-20 to A-29 for roofs and floors.

(2) Beams described in Sentence (1) shall at least meet the requirements for Grade 350 W steel in CAN/CSA-G40.21, “Structural Quality Steel”.

(3) A beam may be considered to be laterally supported if,

(a) the wood joists bear on its top flange at intervals of 600 mm or less over its entire length,

(b) the load being applied to this beam is transmitted through the joists, and

(c) 19 mm by 38 mm wood strips in contact with the top flange are nailed on both sides of the beam to the bottom of the joist supported.

Text · e-Laws consolidated snapshot

Table 9.23.4.3. Maximum Spans for Steel Beams Supporting Floors in Dwelling Units Forming Part of Sentence 9.23.4.3 (1)


Column 1	Column 2	Column 3	Column 4	Column 5	Column 6	Column 7	Column 8
	Supported Joist Length, m (Half the sum of joist spans on both sides of the beam)
	2.4	3.0	3.6	4.2	4.8	5.4	6.0
Section	One Storey Supported
W150 × 22	5.5	5.2	4.9	4.8	4.6	4.5	4.3
W200 × 21	6.5	6.2	5.9	5.7	5.4	5.1	4.9
W200 × 27	7.3	6.9	6.6	6.3	6.1	5.9	5.8
W200 × 31	7.8	7.4	7.1	6.8	6.6	6.4	6.2
W250 × 24	8.1	7.6	7.3	7.0	6.6	6.2	5.9
W250 × 33	9.2	8.7	8.3	8.0	7.7	7.5	7.3
W250 × 39	10.0	9.4	9.0	8.6	8.4	8.1	7.9
W310 × 31	10.4	9.8	9.4	8.9	8.4	8.0	7.6
W310 × 39	11.4	10.7	10.2	9.8	9.5	9.2	9.0
Section	Two Storeys Supported
W150 × 22	4.9	4.4	4.1	3.8	3.5	3.4	3.2
W200 × 21	5.6	5.1	4.6	4.3	4.1	3.8	3.7
W200 × 27	6.4	6.1	5.6	5.3	4.9	4.7	4.4
W200 × 31	6.9	6.5	6.2	5.8	5.4	5.1	4.9
W250 × 24	6.8	6.1	5.6	5.2	4.9	4.6	4.4
W250 × 33	8.2	7.7	7.0	6.5	6.1	5.8	5.5
W250 × 39	8.8	8.3	7.8	7.2	6.8	6.4	6.1
W310 × 31	8.7	7.8	7.2	6.7	6.2	5.9	5.6
W310 × 39	10.0	9.3	8.5	7.9	7.4	7.0	6.7

Table A-20 Maximum Spans for Steel Beams Supporting a Roof and one Floor in Dwelling Units Where Beams Support Exterior Stud Walls with Brick Veneer – 1.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3.(1)


Column 1		Column 2	Column 3	Column 4	Column 5	Column 6	Column 7	Column 8	Column 9
Maximum Span, m
Roof Live Load, kPa		1.0
Supported Roof Length, m		2.4		3.6		4.8		6.0
Supported Floor Length, m		2.4	3.6	2.4	3.6	2.4	3.6	2.4	3.6
Steel Beam Section	W 150 × 22	2.96	2.79	2.86	2.71	2.78	2.65	2.71	2.59
	W 150 × 30	3.32	3.14	3.22	3.05	3.13	2.98	3.04	2.91
	W 150 × 37	3.62	3.41	3.50	3.32	3.40	3.24	3.32	3.17
	W 200 × 27	3.80	3.59	3.68	3.49	3.58	3.41	3.49	3.33
	W 200 × 31	4.06	3.83	3.93	3.73	3.82	3.64	3.72	3.56
	W 200 × 36	4.17	3.94	4.04	3.83	3.93	3.74	3.82	3.65
	W 200 × 42	4.42	4.18	4.29	4.06	4.16	3.96	4.05	3.87
	W 250 × 33	4.71	4.44	4.56	4.32	4.43	4.22	4.31	4.12
	W 250 × 39	5.04	4.76	4.88	4.63	4.75	4.52	4.62	4.41
	W 250 × 49	5.32	5.02	5.15	4.89	5.01	4.77	4.87	4.66
	W 310 × 39	5.66	5.34	5.49	5.20	5.33	5.07	5.19	4.96
	W 310 × 45	5.96	5.62	5.77	5.47	5.61	5.34	5.46	5.22
	W 310 × 52	6.33	5.98	6.13	5.82	5.96	5.67	5.8	5.54
	W 310 × 60	6.50	6.14	6.30	5.98	6.12	5.83	5.96	5.69
	W 360 × 33	5.61	5.29	5.43	5.15	5.28	5.03	5.14	4.91
	W 360 × 39	6.01	5.68	5.83	5.53	5.66	5.39	5.51	5.27
	W 360 × 45	6.38	6.03	6.19	5.87	6.01	5.72	5.85	5.59
	W 360 × 51	6.70	6.32	6.49	6.16	6.31	6.00	6.14	5.87
	W 360 × 57	7.00	6.61	6.78	6.43	6.59	6.28	6.42	6.13

Table A-21 Maximum Spans for Steel Beams Supporting a Roof and one Floor in Dwelling Units Where Beams Support Interior Stud Walls or Exterior Stud Walls with Siding – 1.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3 (1)


Column 1		Column 2	Column 3	Column 4	Column 5	Column 6	Column 7	Column 8	Column 9
Maximum Span, m
Roof Live Load, kPa		1.0
Supported Roof Length, m		2.4		3.6		4.8		6.0
Supported Floor Length, m		2.4	3.6	2.4	3.6	2.4	3.6	2.4	3.6
Steel Beam Section	W 150 × 22	4.20	3.82	3.98	3.67	3.81	3.51	3.66	3.35
	W 150 × 30	4.72	4.30	4.48	4.13	4.28	3.98	4.11	3.85
	W 150 × 37	5.14	4.68	4.88	4.49	4.66	4.33	4.48	4.19
	W 200 × 27	5.41	4.92	5.13	4.72	4.90	4.56	4.71	4.41
	W 200 × 31	5.77	5.25	5.48	5.04	5.23	4.86	5.02	4.71
	W 200 × 36	5.93	5.40	5.63	5.18	5.38	5.00	5.16	4.84
	W 200 × 42	6.29	5.72	5.97	5.50	5.70	5.30	5.47	5.13
	W 250 × 33	6.69	6.09	6.35	5.85	6.06	5.64	5.82	5.45
	W 250 × 39	7.17	6.52	6.80	6.26	6.49	6.04	6.24	5.85
	W 250 × 49	7.56	6.88	7.17	6.61	6.85	6.37	6.58	6.17
	W 310 × 39	8.05	7.32	7.63	7.03	7.29	6.78	7.01	6.56
	W 310 × 45	8.47	7.71	8.03	7.40	7.68	7.14	7.37	6.91

Table A-22 Maximum Spans for Steel Beams Supporting a Roof and one Floor in Dwelling Units Where Beams Support Exterior Stud Walls with Brick Veneer – 1.5 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3 (1)


Column 1			Column 2		Column 3	Column 4	Column 5	Column 6	Column 7	Column 8	Column 9
Maximum Span, m
Roof Live Load, kPa		1.5
Supported Roof Length, m		2.4				3.6		4.8		6.0
Supported Floor Length, m		2.4		3.6		2.4	3.6	2.4	3.6	2.4	3.6
Steel Beam Section	W 150 × 22	2.86		2.71		2.74	2.62	2.64	2.53	2.55	2.46
	W 150 × 30	3.22		3.05		3.08	2.94	2.97	2.85	2.87	2.76
	W 150 × 37	3.50		3.32		3.36	3.20	3.23	3.10	3.13	3.01
	W 200 × 27	3.68		3.49		3.53	3.37	3.40	3.26	3.29	3.16
	W 200 × 31	3.93		3.73		3.77	3.60	3.63	3.48	3.51	3.38
	W 200 × 36	4.04		3.83		3.88	3.70	3.73	3.58	3.61	3.47
	W 200 × 42	4.29		4.06		4.11	3.92	3.96	3.79	3.82	3.68
	W 250 × 33	4.56		4.32		4.37	4.17	4.21	4.03	4.07	3.91
	W 250 × 39	4.88		4.63		4.68	4.47	4.51	4.32	4.36	4.19
	W 250 × 49	5.15		4.89		4.94	4.71	4.76	4.56	4.60	4.42
	W 310 × 39	5.49		5.20		5.26	5.01	5.06	4.85	4.89	4.71
	W 310 × 45	5.77		5.47		5.53	5.28	5.33	5.11	5.15	4.95
	W 310 × 52	6.13		5.82		5.88	5.61	5.66	5.43	5.47	5.26
	W 310 × 60	6.30		5.98		6.04	5.76	5.81	5.57	5.62	5.41
	W 360 × 33	5.43		5.15		5.21	4.97	5.01	4.81	4.85	4.66
	W 360 × 39	5.83		5.53		5.58	5.33	5.38	5.15	5.20	5.00
	W 360 × 45	6.19		5.87		5.93	5.65	5.71	5.47	5.52	5.31
	W 360 × 51	6.49		6.16		6.22	5.93	5.99	5.74	5.79	5.57
	W 360 × 57	6.78		6.43		6.50	6.20	6.26	6.00	6.05	5.82

Table A-23 Maximum Spans for Steel Beams Supporting a Roof and one Floor in Dwelling Units Where Beams Support Interior Stud Walls or Exterior Stud Walls with Siding – 1.5 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3 (1)


Column 1		Column 2		Column 3		Column 4		Column 5		Column 6		Column 7		Column 8		Column 9
Maximum Span, m
Roof Live Load, kPa			1.5
Supported Roof Length, m			2.4				3.6				4.8				6.0
Supported Floor Length, m			2.4		3.6		2.4		3.6		2.4		3.6		2.4		3.6
Steel Beam Section	W 150 × 22		3.98		3.67		3.73		3.48		3.53		3.30		3.36		3.12
	W 150 × 30		4.48		4.13		4.19		3.91		3.97		3.74		3.78		3.59
	W 150 × 37		4.88		4.49		4.56		4.26		4.32		4.07		4.12		3.91
	W 200 × 27		5.13		4.72		4.80		4.48		4.54		4.28		4.33		4.11
	W 200 × 31		5.48		5.04		5.12		4.78		4.85		4.57		4.62		4.39
	W 200 × 36		5.63		5.18		5.27		4.92		4.98		4.70		4.75		4.51
	W 200 × 42		5.97		5.50		5.58		5.21		5.28		4.98		5.04		4.78
	W 250 × 33		6.35		5.85		5.94		5.54		5.62		5.30		5.36		5.09
	W 250 × 39		6.80		6.26		6.36		5.94		6.02		5.67		5.74		5.45
	W 250 × 49		7.17		6.61		6.71		6.27		6.35		5.99		6.06		5.75
	W 310 × 39		7.63		7.03		7.14		6.67		6.76		6.37		6.45		6.12
	W 310 × 45		8.03		7.40		7.52		7.02		7.11		6.71		6.78		6.44

Table A-24 Maximum Spans for Steel Beams Supporting a Roof and one Floor in Dwelling Units Where Beams Support Exterior Stud Walls with Brick Veneer – 2.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3 (1)


Column 1			Column 2	Column 3		Column 4		Column 5	Column 6		Column 7		Column 8	Column 9
Maximum Span, m
Roof Live Load, kPa		2
Supported Roof Length, m		2.4				3.6				4.8			6.0
Supported Floor Length, m		2.4			3.6	2.4	3.6			2.4	3.6	2.4			3.6
Steel Beam Section	W 150 × 22	2.78			2.65	2.64	2.53			2.53	2.43	2.43			2.35
	W 150 × 30	3.13			2.98	2.97	2.85			2.84	2.74	2.73			2.64
	W 150 × 37	3.40			3.24	3.23	3.10			3.09	2.98	2.97			2.88
	W 200 × 27	3.58			3.41	3.40	3.26			3.25	3.13	3.13			3.02
	W 200 × 31	3.82			3.64	3.63	3.48			3.47	3.34	3.34			3.23
	W 200 × 36	3.93			3.74	3.73	3.58			3.57	3.44	3.43			3.32
	W 200 × 42	4.16			3.96	3.96	3.79			3.78	3.64	3.64			3.52
	W 250 × 33	4.43			4.22	4.21	4.03			4.02	3.88	3.87			3.74
	W 250 × 39	4.75			4.52	4.51	4.32			4.31	4.15	4.15			4.01
	W 250 × 49	5.01			4.77	4.76	4.56			4.55	4.38	4.37			4.23
	W 310 × 39	5.33			5.07	5.06	4.85			4.84	4.66	4.65			4.50
	W 310 × 45	5.61			5.34	5.33	5.11			5.10	4.91	4.90			4.74
	W 310 × 52	5.96			5.67	5.66	5.43			5.41	5.21	5.21			5.03
	W 310 × 60	6.12			5.83	5.81	5.57			5.56	5.36	5.35			5.17
	W 360 × 33	5.28			5.03	5.01	4.81			4.80	4.62	4.61			4.46
	W 360 × 39	5.66			5.39	5.38	5.15			5.14	4.95	4.94			4.78
	W 360 × 45	6.01			5.72	5.71	5.47			5.46	5.26	5.25			5.08
	W 360 × 51	6.31			6.00	5.99	5.74			5.73	5.52	5.51			5.33
	W 360 × 57	6.59			6.28	6.26	6.00			5.99	5.77	5.76			5.57

Table A-25 Maximum Spans for Steel Beams Supporting a Roof and one Floor in Dwelling Units Where Beams Support Interior Stud Walls or Exterior Stud Walls with Siding – 2.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3 (1)


Column 1		Column 2	Column 3	Column 4	Column 5	Column 6	Column 7	Column 8	Column 9
Maximum Span, m
Roof Live Load, kPa		2.0
Supported Roof Length, m		2.4		3.6		4.8		6.0
Supported Floor Length, m		2.4	3.6	2.4	3.6	2.4	3.6	2.4	3.6
Steel Beam Section	W 150 × 22	3.81	3.54	3.53	3.33	3.32	3.13	3.15	2.94
	W 150 × 30	4.28	3.98	3.97	3.74	3.73	3.55	3.54	3.39
	W 150 × 37	4.66	4.33	4.32	4.70	4.06	3.86	3.85	3.69
	W 200 × 27	4.90	4.56	4.54	4.28	4.27	4.06	4.05	3.88
	W 200 × 31	5.23	4.86	4.85	4.57	4.56	4.34	4.32	4.14
	W 200 × 36	5.38	5.00	4.98	4.07	4.68	4.46	4.45	4.26
	W 200 × 42	5.70	5.30	5.28	4.98	4.96	4.72	4.71	4.51
	W 250 × 33	6.06	5.64	5.62	5.30	5.28	5.03	5.01	4.80
	W 250 × 39	6.49	6.04	6.02	5.67	5.66	5.38	5.37	5.14
	W 250 × 49	6.85	6.37	6.35	5.99	5.97	5.68	5.67	5.43
	W 310 × 39	7.29	6.78	6.76	6.37	6.35	6.04	6.03	5.77
	W 310 × 45	7.68	7.14	7.11	6.71	6.69	6.36	6.35	6.08

Table A-26 Maximum Spans for Steel Beams Supporting a Roof and one Floor in Dwelling Units Where Beams Support Exterior Stud Walls with Brick Veneer – 2.5 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3 (1)


Column 1		Column 2	Column 3	Column 4	Column 5	Column 6	Column 7	Column 8	Column 9
Maximum Span, m
Roof Live Load, kPa		2.5
Supported Roof Length, m		2.4		3.6		4.8		6.0
Supported Floor Length, m		2.4	3.6	2.4	3.6	2.4	3.6	2.4	3.6
Steel Beam Section	W 150 × 22	2.71	2.59	2.55	2.46	2.43	2.35	2.33	2.26
	W 150 × 30	3.04	2.91	2.87	2.76	2.73	2.64	2.62	2.54
	W 150 × 37	3.32	3.17	3.13	3.01	2.97	2.88	2.85	2.77
	W 200 × 27	3.49	3.33	3.29	3.16	3.13	3.02	2.99	2.91
	W 200 × 31	3.72	3.56	3.51	3.38	3.34	3.23	3.20	3.10
	W 200 × 36	3.82	3.65	3.61	3.47	3.43	3.32	3.29	3.19
	W 200 × 42	4.05	3.87	3.82	3.68	3.64	3.52	3.48	3.38
	W 250 × 33	4.31	4.12	4.07	3.91	3.87	3.74	3.71	3.60
	W 250 × 39	4.62	4.41	4.36	4.19	4.15	4.01	3.97	3.85
	W 250 × 49	4.87	4.66	4.60	4.42	4.37	4.23	4.19	4.07
	W 310 × 39	5.19	4.96	4.89	4.71	4.65	4.50	4.46	4.33
	W 310 × 45	5.46	5.22	5.15	4.95	4.90	4.74	4.69	4.55
	W 310 × 52	5.80	5.54	5.47	5.26	5.21	5.03	4.98	4.84
	W 310 × 60	5.96	5.69	5.62	5.41	5.35	5.17	5.12	4.97
	W 360 × 33	5.14	4.91	4.85	4.66	4.61	4.46	4.42	4.29
	W 360 × 39	5.51	5.27	5.20	5.00	4.94	4.78	4.73	4.60
	W 360 × 45	5.85	5.59	5.52	5.31	5.25	5.08	5.03	4.88
	W 360 × 51	6.14	5.87	5.79	5.57	5.51	5.33	5.27	5.12
	W 360 × 57	6.42	6.13	6.05	5.82	5.76	5.57	5.51	5.35

Table A-27 Maximum Spans for Steel Beams Supporting a Roof and one Floor in Dwelling Units Where Beams Support Interior Stud Walls or Exterior Stud Walls with Siding – 2.5 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3 (1)


Column 1		Column 2		Column 3		Column 4	Column 5	Column 6	Column 7	Column 8	Column 9
Maximum Span, m
Roof Live Load, kPa			2.5
Supported Roof Length, m			2.4			3.6		4.8		6.0
Supported Floor Length, m			2.4		3.6	2.4	3.6	2.4	3.6	2.4	3.6
Steel Beam Section	W 150 × 22		3.66		3.43	3.36	3.19	3.15	2.98	2.98	2.79
	W 150 × 30		4.11		3.85	3.78	3.59	3.54	3.39	3.35	3.23
	W 150 × 37		4.48		4.19	4.12	3.91	3.85	3.69	3.64	3.51
	W 200 × 27		4.71		4.41	4.33	4.11	4.05	3.88	3.83	3.69
	W 200 × 31		5.02		4.71	4.62	4.39	4.32	4.14	4.09	3.94
	W 200 × 36		5.16		4.84	4.75	4.51	4.45	4.26	4.21	4.05
	W 200 × 42		5.47		5.13	5.04	4.78	4.71	4.51	4.46	4.30
	W 250 × 33		5.82		5.46	5.36	5.09	5.01	4.80	4.74	4.54
	W 250 × 39		6.24		5.85	5.74	5.45	5.37	5.14	5.08	4.90
	W 250 × 49		6.58		6.17	6.06	5.75	5.67	5.43	5.36	5.17
	W 310 × 39		7.01		6.56	6.45	6.12	6.03	5.78	5.70	5.47
	W 310 × 45		7.37		6.91	6.78	6.44	6.35	6.08	6.00	5.79

Table A-28 Maximum Spans for Steel Beams Supporting a Roof and one Floor in Dwelling Units Where Beams Support Exterior Stud Walls with Brick Veneer – 3.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3 (1)


Column 1		Column 2		Column 3		Column 4		Column 5		Column 6		Column 7		Column 8		Column 9
Maximum Span, m
Roof Live Load, kPa			3.0
Supported Roof Length, m			2.4				3.6				4.8				6.0
Supported Floor Length, m			2.4		3.6		2.4		3.6		2.4		3.6		2.4		3.6
Steel Beam Section	W 150 × 22		2.64		2.53		2.48		2.39		2.35		2.28		2.24		2.18
	W 150 × 30		2.97		2.85		2.78		2.69		2.64		2.56		2.52		2.45
	W 150 × 37		3.23		3.10		3.03		2.93		2.87		2.79		2.74		2.67
	W 200 × 27		3.40		3.26		3.19		3.08		3.02		2.93		2.88		2.81
	W 200 × 31		3.63		3.48		3.40		3.28		3.22		3.13		3.08		3.00
	W 200 × 36		3.73		3.58		3.50		3.38		3.31		3.21		3.16		3.08
	W 200 × 42		3.96		3.79		3.71		3.58		3.51		3.41		3.35		3.26
	W 250 × 33		4.21		4.03		3.94		3.81		3.74		3.62		3.57		3.47
	W 250 × 39		4.51		4.32		4.23		4.08		4.00		3.88		3.82		3.72
	W 250 × 49		4.76		4.56		4.46		4.30		4.22		4.10		4.03		3.93
	W 310 × 39		5.06		4.85		4.74		4.58		4.49		4.36		4.29		4.18
	W 310 × 45		5.33		5.11		4.99		4.82		4.73		4.59		4.51		4.40
	W 310 × 52		5.66		5.43		5.31		5.12		5.03		4.88		4.80		4.67
	W 310 × 60		5.81		5.57		5.45		5.26		5.16		5.01		4.93		4.80
	W 360 × 33		5.01		4.81		4.70		4.54		4.45		4.32		4.25		4.14
	W 360 × 39		5.38		5.15		5.04		4.86		4.77		4.63		4.56		4.44
	W 360 × 45		5.71		5.47		5.35		5.16		5.07		4.92		4.84		4.71
	W 360 × 51		5.99		5.74		5.61		5.42		5.32		5.16		5.08		4.94
	W 360 × 57		6.26		6.00		5.87		5.66		5.56		5.39		5.31		5.17

Table A-29 Maximum Spans for Steel Beams Supporting a Roof and one Floor in Dwelling Units Where Beams Support Interior Stud Walls or Exterior Stud Walls with Siding – 3.0 kPa Specified Roof Design Snow Load Forming Part of Sentence 9.23.4.3 (1)


Column 1		Column 2	Column 3	Column 4	Column 5	Column 6	Column 7	Column 8	Column 9
Maximum Span, m
Roof Live Load, kPa		3.0
Supported Roof Length, m		2.4		3.6		4.8		6.0
Supported Floor Length, m		2.4	3.6	2.4	3.6	2.4	3.6	2.4	3.6
Steel Beam Section	W 150 × 22	3.53	3.33	3.23	3.08	3.01	2.85	2.83	2.66
	W 150 × 30	3.97	3.74	3.63	3.47	3.38	3.26	3.19	3.09
	W 150 × 37	4.32	4.07	3.95	3.77	3.68	3.55	3.48	3.37
	W 200 × 27	4.54	4.28	4.15	3.97	3.87	3.73	3.65	3.52
	W 200 × 31	4.85	4.57	4.43	4.23	4.13	3.98	3.90	3.78
	W 200 × 36	4.98	4.70	4.56	4.35	4.25	4.09	4.01	3.88
	W 200 × 42	5.28	4.98	4.83	4.61	4.50	4.34	4.25	4.12
	W 250 × 33	5.62	5.30	5.14	4.91	4.79	4.61	4.52	4.33
	W 250 × 39	6.02	5.67	5.51	5.26	5.13	4.94	4.84	4.69
	W 250 × 49	6.35	5.99	5.81	5.55	5.42	5.21	5.11	4.95
	W 310 × 39	6.76	6.37	6.18	5.90	5.76	5.55	5.44	5.21
	W 310 × 45	7.11	6.71	6.51	6.21	6.07	5.84	5.72	5.54

9.23.4.4. — Concrete Topping

(1) Except as permitted in Sentence (2), where a floor is required to support a concrete topping, the joist spans shown in Table A-1 or the spacing of the members shall be reduced to allow for the loads due to the topping.

(2) Where a floor is required to support a concrete topping, joist spans are permitted to be selected from Table A-2 provided the concrete,

(a) is 38 to 51 mm thick,

(b) is normal weight,

(d) has not less than 20 MPa compressive strength after 28 days.

(3) Where a floor is required to support a concrete topping not more than 51 mm thick, the beam spans shown in Tables A-8 to A-11 shall be multiplied by 0.8 or the supported length of the floor joists shall be reduced to allow for the loads due to the topping.

Editor's note

In the 'Maximum Spans for Floor Joists - Special Cases' table (Table A-2) under Article 9.23.4.4., the as-filed O. Reg. 350/06 contains several typographical anomalies that this map reproduces as filed: the Column 8 header cell is blank ('Col.'; it is Column 8 by position), one lumber-grade label reads 'No .1' with a misplaced space, and another reads 'No 3' with the period omitted. In the table notes, the '(1)' and '(2)' reference markers appear as plain text. The consolidated e-Laws version silently supplies the missing characters, superscripts the note markers, and bolds the notes heading; none of these changes was enacted by an amending regulation.

Text · e-Laws consolidated snapshot

Table A-2 Maximum Spans for Floor Joists – Special Cases(1) Forming Part of Sentence 9.23.4.2.(1) and 9.23.4.4.(2)

Column 1	Column 2	Column 3	Col. 4	Col. 5	Col. 6	Col. 7	Col.	Col. 9	Col. 10	Col. 11	Col. 12
Commercial Designation	Grade	Joist Size, mm	Maximum Span, m
			Joists with Ceilings Attached to Wood Furring						Joists with Concrete Topping
			Without Bridging			With Bridging			With or Without Bridging⁽²⁾
			Joist Spacing, mm			Joist Spacing, mm			Joist Spacing, mm
			300	400	600	300	400	600	300	400	600
Douglas Fir – Larch (includes Douglas Fir and Western Larch)	Select	38 × 89	2.19	1.99	1.73	2.19	1.99	1.73	2.19	1.99	1.73
	Structural	38 × 140	3.44	3.12	2.73	3.44	3.12	2.73	3.44	3.12	2.73
		38 × 184	4.24	3.99	3.59	4.52	4.11	3.59	4.52	4.11	3.59
		38 × 235	4.98	4.69	4.29	5.47	5.20	4.58	5.77	5.24	4.58
		38 × 286	5.67	5.34	4.88	6.19	5.89	5.54	6.83	6.37	5.58
	No. 1 and	38 × 89	2.09	1.90	1.66	2.09	1.90	1.66	2.09	1.90	1.66
	No. 2	38 × 140	3.29	2.99	2.62	3.29	2.99	2.62	3.29	2.99	2.55
		38 × 184	4.06	3.83	3.44	4.33	3.93	3.44	4.33	3.81	3.11
		38 × 235	4.78	4.50	4.11	5.24	4.98	4.31	5.37	4.65	3.80
		38 × 286	5.44	5.12	4.68	5.93	5.64	5.00	6.24	5.40	4.41
	No. 3	38 × 89	1.95	1.69	1.38	1.95	1.69	1.38	1.72	1.49	1.21
		38 × 140	2.78	2.41	1.97	2.78	2.41	1.97	2.45	2.12	1.73
		38 × 184	3.38	2.93	2.39	3.38	2.93	2.39	2.98	2.58	2.11
		38 × 235	4.14	3.58	2.93	4.14	3.58	2.93	3.65	3.16	2.58
		38 × 286	4.80	4.16	3.39	4.80	4.16	3.39	4.23	3.66	2.99
	Construction	38 × 89	2.03	1.84	1.61	2.03	1.84	1.61	2.03	1.84	1.61
	Standard	38 × 89	1.88	1.63	1.33	1.88	1.63	1.33	1.66	1.44	1.17
Hem – Fir (includes Western Hemlock and Amabilis Fir)	Select	38 × 89	2.16	1.96	1.71	2.16	1.96	1.71	2.16	1.96	1.71
	Structural	38 × 140	3.39	3.08	2.69	3.39	3.08	2.69	3.39	3.08	2.69
		38 × 184	4.18	3.94	3.54	4.46	4.05	3.54	4.46	4.05	3.54
		38 × 235	4.92	4.63	4.23	5.39	5.13	4.52	5.69	5.17	4.52
		38 × 286	5.60	5.27	4.82	6.10	5.81	5.47	6.74	6.28	5.50
	No .1 and	38 × 89	2.09	1.90	1.66	2.09	1.90	1.66	2.09	1.90	1.66
	No. 2	38 × 140	3.29	2.99	2.62	3.29	2.99	2.62	3.29	2.99	2.62
		38 × 184	4.06	3.83	3.44	4.33	3.93	3.44	4.33	3.93	3.26
		38 × 235	4.78	4.50	4.11	5.24	4.98	4.39	5.53	4.88	3.99
		38 × 286	5.44	5.12	4.68	5.93	5.64	5.25	6.54	5.66	4.63
	No 3	38 × 89	2.03	1.84	1.61	2.03	1.84	1.61	2.03	1.83	1.50
		38 × 140	3.19	2.90	2.43	3.19	2.90	2.43	3.02	2.62	2.14
		38 × 184	3.94	3.61	2.95	4.17	3.61	2.95	3.68	3.18	2.60
		38 × 235	4.63	4.36	3.61	5.08	4.42	3.61	4.50	3.89	3.18
		38 × 286	5.27	4.96	4.19	5.74	5.13	4.19	5.22	4.52	3.69
	Construction	38 × 89	2.03	1.84	1.61	2.03	1.84	1.61	2.03	1.84	1.61
	Standard	38 × 89	1.96	1.71	1.39	1.96	1.71	1.39	1.74	1.50	1.23
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)	Select	38 × 89	2.06	1.87	1.64	2.06	1.87	1.64	2.06	1.87	1.64
	Structural	38 × 140	3.24	2.95	2.57	3.24	2.95	2.57	3.24	2.95	2.57
		38 × 184	4.00	3.77	3.38	4.26	3.87	3.38	4.26	3.87	3.38
		38 × 235	4 70	4.43	4.05	5.16	4.91	4.32	5.45	4.95	4.32
		38 × 286	5.35	5.04	4.61	5.84	5.55	5.23	6.45	6.01	5.26
	No. 1 and	38 × 89	1.99	1.81	1.58	1.99	1.81	1.58	1.99	1.81	1.58
	No. 2	38 × 140	3.14	2.85	2.49	3.14	2.85	2.49	3.14	2.85	2.49
		38 × 184	3.87	3.64	3.27	4.12	3.75	3.27	4.12	3.75	3.27
		38 × 235	4.55	4.28	3.91	4.99	4.75	4.18	5.27	4.79	4.13
		38 × 286	5.18	4.88	4.46	5.65	5.37	5.06	6.23	5.81	4.79
	No. 3	38 × 89	1.96	1.78	1.55	1.96	1.78	1.55	1.96	1.78	1.50
		38 × 140	3.08	2.80	2.43	3.08	2.80	2.43	3.02	2.62	2.14
		38 × 184	3.80	3.58	2.95	4.05	3.61	2.95	3.68	3.18	2.60
		38 × 235	4.47	4.21	3.61	4.90	4.42	3.61	4.50	3.89	3.18
		38 × 286	5.09	4.79	4.19	5.55	5.13	4.19	5.22	4.52	3.69
	Construction	38 × 89	1.96	1.78	1.55	1.96	1.78	1.55	1.96	1.78	1.55
	Standard	38 × 89	1.88	1.71	1.44	1.88	1.71	1.44	1.80	1.56	1.27
Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules	Select	38 × 89	1.84	1.68	1.46	1.84	1.68	1.46	1.84	1.68	1.46
	Structural	38 × 140	2.90	2.63	2.30	2.90	2.63	2.30	2.90	2.63	2.30
		38 × 184	3.58	3.37	3.03	3.81	3.46	3.03	3.81	3.46	3.03
		38 × 235	4.20	3.96	3.62	4.61	4.39	3.86	4.87	4.42	3.86
		38 × 286	4.79	4.51	4.12	5.22	4.96	4.68	5.76	5.37	4.54
	No. 1 and	38 × 89	1.80	1.64	1.43	1.80	1.64	1.43	1.80	1.64	1.43
	No. 2	38 × 140	2.83	2.57	2.25	2.83	2.57	2.25	2.83	2.57	2.23
		38 × 184	3.50	3.29	2.96	3.72	3.38	2.96	3.72	3.32	2.71
		38 × 235	4.11	3.87	3.54	4.51	4.29	3.76	4.69	4.06	3.31
		38 × 286	4.68	4.40	4.03	5.10	4.85	4.36	5.44	4.71	3.84
	No. 3	38 × 89	1.76	1.60	1.36	1.76	1.60	1.36	1.70	1.47	1.20
		38 × 140	2.75	2.38	1.94	2.75	2.38	1.94	2.42	2.10	1.71
		38 × 184	3.35	2.90	2.37	3.35	2.90	2.37	2.95	2.55	2.08
		38 × 235	4.01	3.54	2.89	4.09	3.54	2.89	3.61	3.12	2.55
		38 × 286	4.56	4.11	3.36	4.75	4.11	3.36	4.18	3.62	2.96
	Construction	38 × 89	1.76	1.60	1.40	1.76	1.60	1.40	1.76	1.60	1.37
	Standard	38 × 89	1.63	1.41	1.15	1.63	1.41	1.15	1.44	1.25	1.02

Notes to Table A-2:

⁽²⁾No bridging is assumed for spans for floor joists with concrete topping.

9.23.4.5. — Heavy Roofing Materials

(1) Where a roof is required to support an additional uniform dead load from roofing materials such as concrete roofing tile, or materials other than as specified in Section 9.26., such as clay roofing tiles, the additional load shall be allowed for by reducing,

(a) the spans for roof joists and rafters in Tables A-4 to A-7, or the spacing of the members, and

(b) the spans for ridge beams and lintels in Tables A-12 to A-16.

Text · e-Laws consolidated snapshot

Provenance

OBC 1997 · continues from 9.23.4. — Pro

Base · O. Reg. 350/06 · ext← current

Original — base regulation

OBC 2012 · continues as 9.23.4. — Pro

9.23.4.

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