CodeChronicle
Search Pricing Login Sign up

OBC 2006 › Division B

9.23.12.3.

Version 0 — in force 31 December 2006

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 9.23.12.3. — Pro

Base · O. Reg. 350/06 · ext← current

Original — base regulation

O. Reg. 503/09, cl. 200 · ext v1 →

In force 2010-01-01

Next: O. Reg. 503/09, cl. 200 · ext (not in force until 2010-01-01) v1 →

OBC 2012 · continues as 9.23.12.3. — Pro

9.23.12.3. — Lintel Spans and Sizes

(1) Spans and sizes of wood lintels shall conform to the spans shown in Tables A-12 to A-16,

(a) for buildings of residential occupancy,

(b) where the wall studs exceed 38 mm by 64 mm in size,

(c) where the spans of supported joists do not exceed 4.9 m, and

(d) where the spans of trusses do not exceed 9.8 m.

(2) In loadbearing exterior and interior walls of 38 by 64 mm framing members, lintels shall consist of,

(a) solid 64 mm thick members on edge, or

(b) 38 mm thick and 19 mm thick members fastened together with a double row of nails not less than 63 mm long and spaced not more than 450 mm apart.

(3) Lintels referred to in Sentence (2),

(a) shall be not less than 50 mm greater in depth than those shown in Tables A-12 to A-16 for the maximum spans shown, and

(b) shall not exceed 2 240 mm in length.

Editor's note

This map follows the as-filed column-header text of O. Reg. 350/06 for the tables under Article 9.23.12.3. The e-Laws consolidation editorially abbreviates the column headers (e.g. 'Column' to 'col.'); no amending regulation makes this change.

Text · e-Laws consolidated snapshot

Table A-13 Maximum Spans for Douglas Fir – Larch Lintels – No. 1 or No. 2 Grade -Non-Structural Sheathing(1) Forming Part of Sentences 9.23.12.3.(1) and (3)

Column 1

Column 2

Column 3

Column 4

Column 5

Column 6

Column 7

Column 8

Lintel Supporting

Lintel Size, mm(2)

Maximum Span, m(3)(4)

Exterior Walls

Interior Walls

Specified Snow Load, kPa

1.0

1.5

2.0

2.5

3.0

Limited attic storage and ceiling

2 – 38 × 89

This Area Intentionally Left Blank

1.25

2 – 38 × 140

1.78

2 – 38 × 184

2.17

2 – 38 × 235

2.65

2 – 38 × 286

3.08

Roof and ceiling only (tributary width of 0.6 m maximum)(5)

2 – 38 × 89

2.68

2.34

2.13

1.97

1.86

1.97

2 – 38 × 140

4.21

3.68

3.34

3.10

2.92

3.10

2 – 38 × 184

5.50

4.84

4.39

4.08

3.84

4.08

2 – 38 × 235

6.61

5.97

5.56

5.21

4.88

5.21

2 – 38 × 286

7.66

6.92

6.44

6.09

5.66

6.09

Roof and ceiling only (tributary width of 4.9 m maximum)(6)

2 – 38 × 89

1.25

1.07

0.96

0.87

0.80

0.87

2 – 38 × 140

1.78

1.53

1.36

1.24

1.15

1.24

2 – 38 × 184

2.17

1.86

1.66

1.51

1.40

1.51

2 – 38 × 235

2.65

2.28

2.03

1.85

1.71

1.85

2 – 38 × 286

3.08

2.64

2.35

2.14

1.98

2.14

Roof, ceiling and 1 storey(3)(6)(7)

2 – 38 × 89

0.96

0.88

0.82

0.77

0.73

0.68

2 – 38 × 140

1.37

1.26

1.17

1.10

1.04

0.97

2 – 38 × 184

1.67

1.53

1.42

1.34

1.26

1.18

2 – 38 × 235

2.04

1.88

1.74

1.63

1.54

1.44

2 – 38 × 286

2.37

2.18

2.02

1.90

1.79

1.67

Roof, ceiling and 2 storeys(3)(6)(7)

2 – 38 × 89

0.86

0.81

0.77

0.73

0.70

0.61

2 – 38 × 140

1.23

1.16

1.09

1.04

0.99

0.87

2 – 38 × 184

1.50

1.41

1.33

1.27

1.21

1.06

2 – 38 × 235

1.84

1.72

1.63

1.55

1.48

1.30

2 – 38 × 286

2.13

2.00

1.89

1.80

1.72

1.51

Roof, ceiling and 3 storeys(3)(6)(7)

2 – 38 × 89

0.81

0.77

0.73

0.71

0.68

0.57

2 – 38 × 140

1.15

1.10

1.05

1.01

0.97

0.82

2 – 38 × 184

1.40

1.33

1.28

1.22

1.18

1.00

2 – 38 × 235

1.71

1.63

1.56

1.50

1.44

1.22

2 – 38 × 286

1.99

1.89

1.81

1.74

1.67

1.41

Notes to Table A-13:

(1)Where structural sheathing is used, lintel spans may be increased by 15%. Structural sheathing consists of a minimum 9.5 mm thick structural panel conforming to CSA O121-M, CSA O151, CAN/CSA-O325.0 or CSA O437.0 fastened with at least two rows of fasteners to the exterior face of the lintel, and a single row to the top plates and studs. Fasteners shall conform to Table 9.23.3.5.

(2)A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge.

(3)If floor joists span the full width of the building without support, lintel spans shall be reduced by 15% for “Roof, ceiling and 1 storey”, by 20% for “Roof, ceiling and 2 storeys”, and by 25% for “Roof, ceiling and 3 storeys”.

(4)For ends of lintels fully supported by walls, provide minimum bearing length of 38 mm for lintel spans up to 3 m, or minimum bearing length of 76 mm for lintel spans greater than 3 m.

(5)Spans for 0.6 m tributary width are calculated for lintels in end walls that support only a 0.6 m width of roof and ceiling, but do not support roof joists, roof rafters or roof trusses.

(6)Lintel spans are calculated based on a maximum floor joist, roof joist or rafter span of 4.9 m and a maximum roof truss span of 9.8 m. Lintel spans may be increased by 5% if rafter and joist spans are not more than 4.3 m and roof truss spans are not more than 8.6 m. Spans may be increased by 10% if rafter and joist spans are not more than 3.7 m and roof trusses are not more than 7.4 m.

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

Table A-14 Maximum Spans for Hem – Fir Lintels – No. 1 or No. 2 Grade – Non-Structural Sheathing(1) Forming Part of Sentences 9.23.12.3.(1) and (3)

Column 1

Column 2

Column 3

Column 4

Column 5

Column 6

Column 7

Column 8

Lintel Supporting

Lintel Size, mm(2)

Maximum Span, m(3)(4)

Exterior Walls

Interior Walls

Specified Snow Load, kPa

1.0

1.5

2.0

2.5

3.0

Limited attic storage and ceiling

2 – 38 × 89

This Area Intentionally Left Blank

1.31

2 – 38 × 140

1.87

2 – 38 × 184

2.27

2 – 38 × 235

2.78

2 – 38 × 286

3.23

Roof and ceiling only (tributary width of 0.6 m maximum)(5)

2 – 38 × 89

2.68

2.34

2.13

1.97

1.86

1.97

2 – 38 × 140

4.21

3.68

3.34

3.10

2.92

3.10

2 – 38 × 184

5.50

4.84

4.39

4.08

3.84

4.08

2 – 38 × 235

6.61

5.97

5.56

5.21

4.90

5.21

2 – 38 × 286

7.66

6.92

6.44

6.09

5.82

6.09

Roof and ceiling only (tributary width of 4.9 m maximum)(6)

2 – 38 × 89

1.31

1.13

1.00

0.91

0.84

0.91

2 – 38 × 140

1.87

1.61

1.43

1.30

1.20

1.30

2 – 38 × 184

2.27

1.95

1.74

1.58

1.42

1.58

2 – 38 × 235

2.78

2.39

2.13

1.92

1.71

1.92

2 – 38 × 286

3.23

2.77

2.47

2.17

1.94

2.17

Roof, ceiling and 1 storey(3)(6)(7)

2 – 38 × 89

1.01

0.93

0.86

0.81

0.76

0.69

2 – 38 × 140

1.44

1.32

1.23

1.14

1.05

0.95

2 – 38 × 184

1.75

1.61

1.47

1.34

1.23

1.12

2 – 38 × 235

2.14

1.96

1.76

1.60

1.48

1.35

2 – 38 × 286

2.49

2.22

2.00

1.82

1.69

1.55

Roof, ceiling and 2 storeys(3)(6)(7)

2 – 38 × 89

0.91

0.85

0.80

0.76

0.72

0.60

2 – 38 × 140

1.29

1.21

1.13

1.05

0.98

0.82

2 – 38 × 184

1.57

1.44

1.33

1.24

1.16

0.98

2 – 38 × 235

1.90

1.73

1.60

1.49

1.40

1.19

2 – 38 × 286

2.15

1.97

1.82

1.70

1.60

1.37

Roof, ceiling and 3 storeys(3)(6)(7)

2 – 38 × 89

0.85

0.81

0.77

0.74

0.69

0.55

2 – 38 × 140

1.21

1.14

1.06

1.00

0.95

0.76

2 – 38 × 184

1.43

1.33

1.25

1.18

1.12

0.91

2 – 38 × 235

1.72

1.60

1.50

1.42

1.35

1.10

2 – 38 × 286

1.95

1.82

1.72

1.63

1.55

1.27

Notes to Table A-14:

(1)Where structural sheathing is used, lintel spans may be increased by 15%. Structural sheathing consists of a minimum 9.5 mm thick structural panel conforming to CSA O121-M, CSA O151, CAN/CSA-O325.0 or CSA O437.0 fastened with at least two rows of fasteners to the exterior face of the lintel, and a single row to the top plates and studs. Fasteners shall conform to Table 9.23.3.5.

(2)A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge.

(3)If floor joists span the full width of the building without support, lintel spans shall be reduced by 15% for “Roof, ceiling and 1 storey”, by 20% for “Roof, ceiling and 2 storeys”, and by 25% for “Roof, ceiling and 3 storeys”.

(4) For ends of lintels fully supported by walls, provide minimum bearing length of 38 mm for lintel spans up to 3 m, or minimum bearing length of 76 mm for lintel spans greater than 3 m.

(5)Spans for 0.6 m tributary width are calculated for lintels in end walls that support only a 0.6 m width of roof and ceiling, but do not support roof joists, roof rafters or roof trusses.

(6) Lintel spans are calculated based on a maximum floor joist, roof joist or rafter span of 4.9 m and a maximum roof truss span of 9.8 m. Lintel spans may be increased by 5% if rafter and joist spans are not more than 4.3 m and roof truss spans are not more than 8.6 m. Spans may be increased by 10% if rafter and joist spans are not more than 3.7 m and roof trusses are not more than 7.4 m.

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

Table A-15 Maximum Spans for Spruce – Pine – Fir Lintels – No. 1 or No. 2 Grade – Non-Structural Sheathing(1) Forming Part of Sentences 9.23.12.3.(1) and (3)

Column 1

Column 2

Column 3

Column 4

Column 5

Column 6

Column 7

Column 8

Lintel Supporting

Lintel Size, mm(2)

Maximum Span, m(3)(4)

Exterior Walls

Interior Walls

Specified Snow Load, kPa

1.0

1.5

2.0

2.5

3.0

Limited attic storage and ceiling

2 – 38 × 89

This Area Intentionally Left Blank

1.27

2 – 38 × 140

1.93

2 – 38 × 184

2.35

2 – 38 × 235

2.88

2 – 38 × 286

3.34

Roof and ceiling only (tributary width of 0.6 m maximum)(5)

2 – 38 × 89

2.55

2.23

2.02

1.88

1.77

1.88

2 – 38 × 140

4.01

3.50

3.18

2.96

2.78

2.96

2 – 38 × 184

5.27

4.61

4.18

3.88

3.66

3.88

2 – 38 × 235

6.37

5.76

5.34

4.96

4.67

4.96

2 – 38 × 286

7.38

6.67

6.21

5.87

5.61

5.87

Roof and ceiling only (tributary width of 4.9 m maximum)(6)

2 – 38 × 89

1.27

1.11

1.01

0.93

0.87

0.93

2 – 38 × 140

1.93

1.66

1.48

1.35

1.25

1.35

2 – 38 × 184

2.35

2.02

1.80

1.64

1.52

1.64

2 – 38 × 235

2.88

2.47

2.20

2.01

1.84

2.01

2 – 38 × 286

3.34

2.87

2.56

2.33

2.09

2.33

Roof, ceiling and 1 storey(3)(6)(7)

2 – 38 × 89

1.05

0.96

0.89

0.84

0.79

0.74

2 – 38 × 140

1.49

1.37

1.27

1.19

1.13

1.02

2 – 38 × 184

1.82

1.67

1.55

1.44

1.33

1.20

2 – 38 × 235

2.22

2.04

1.89

1.73

1.59

1.45

2 – 38 × 286

2.58

2.36

2.15

1.96

1.81

1.66

Roof, ceiling and 2 storeys(3)(6)(7)

2 – 38 × 89

0.94

0.88

0.83

0.79

0.76

0.64

2 – 38 × 140

1.34

1.26

1.19

1.13

1.06

0.88

2 – 38 × 184

1.63

1.53

1.44

1.33

1.25

1.05

2 – 38 × 235

1.99

1.87

1.72

1.60

1.50

1.27

2 – 38 × 286

2.31

2.12

1.96

1.82

1.71

1.45

Roof, ceiling and 3 storeys(3)(6)(7)

2 – 38 × 89

0.88

0.83

0.80

0.77

0.74

0.59

2 – 38 × 140

1.25

1.19

1.14

1.08

1.02

0.81

2 – 38 × 184

1.52

1.44

1.35

1.27

1.21

0.97

2 – 38 × 235

1.86

1.73

1.62

1.53

1.45

1.17

2 – 38 × 286

2.11

1.96

1.84

1.74

1.66

1.35

Notes to Table A-15:

(1)Where structural sheathing is used, lintel spans may be increased by 15%. Structural sheathing consists of a minimum 9.5 mm thick structural panel conforming to CSA O121-M, CSA O151, CAN/CSA-O325.0 or CSA O437.0 fastened with at least two rows of fasteners to the exterior face of the lintel, and a single row to the top plates and studs. Fasteners shall conform to Table 9.23.3.5.

(2)A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge.

(3)If floor joists span the full width of the building without support, lintel spans shall be reduced by 15% for “Roof, ceiling and 1 storey”, by 20% for “Roof, ceiling and 2 storeys”, and by 25% for “Roof, ceiling and 3 storeys”.

(4)For ends of lintels fully supported by walls, provide minimum bearing length of 38 mm for lintel spans up to 3 m, or minimum bearing length of 76 mm for lintel spans greater than 3 m.

(5)Spans for 0.6 m tributary width are calculated for lintels in end walls that support only a 0.6 m width of roof and ceiling, but do not support roof joists, roof rafters or roof trusses.

(6)Lintel spans are calculated based on a maximum floor joist, roof joist or rafter span of 4.9 m and a maximum roof truss span of 9.8 m. Lintel spans may be increased by 5% if rafter and joist spans are not more than 4.3 m and roof truss spans are not more than 8.6 m. Spans may be increased by 10% if rafter and joist spans are not more than 3.7 m and roof trusses are not more than 7.4 m.

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

Table A-16 Maximum Spans for Glued-Laminated Timber Lintels – 20f-E Stress Grade – Exterior Walls – Roof and Ceiling Load Only Forming Part of Sentences 9.23.12.3.(1) and (3)

Column 1

C. 2

C. 3

C. 4

C. 5

C. 6

C. 7

C. 8

C. 9

C. 10

C. 11

C. 12

C. 13

C. 14

C. 15

C. 16

Lintel Size, mm

Maximum Span, m(1)(2)(3)

Specified Snow Load, kPa

1.0

1.5

2.0

2.5

3.0

Supported length, m(4)(5)

Supported length, m(4)(5)

Supported length, m(4)(5)

Supported length, m(4)(5)

Supported length, m(4)(5)

2.4

3.6

4.8

2.4

3.6

4.8

2.4

3.6

4.8

2.4

3.6

4.8

2.4

3.6

4.8

130 × 304

6.23

5.63

5.24

5.63

5.09

4.73

5.24

4.73

4.40

4.95

4.48

4.17

4.73

4.28

3.87

80 × 380

6.52

5.89

5.48

5.89

5.32

4.96

5.48

4.96

4.52

5.19

4.69

4.11

4.96

4.39

3.80

130 × 342

6.80

6.15

5.72

6.15

5.56

5.17

5.72

5.17

4.81

5.41

4.89

4.55

5.17

4.67

4.35

80 × 418

7.00

6.33

5.89

6.33

5.72

5.32

5.89

5.32

4.96

5.57

5.03

4.52

5.32

4.81

4.18

130 × 380

7.36

6.65

6.19

6.65

6.01

5.59

6.19

5.59

5.21

5.86

5.29

4.92

5.59

5.06

4.70

80 × 456

7.48

6.76

6.29

6.76

6.10

5.68

6.29

5.68

5.29

5.95

5.37

4.93

5.68

5.13

4.56

130 × 418

7.91

7.15

6.65

7.15

6.46

6.01

6.65

6.01

5.59

6.29

5.68

5.29

6.01

5.43

5.05

80 × 494

7.94

7.17

6.68

7.17

6.48

6.03

6.68

6.03

5.61

6.31

5.71

5.31

6.03

5.45

4.94

80 × 532

8.39

7.58

7.06

7.58

6.85

6.38

7.06

6.38

5.93

6.67

6.03

5.61

6.38

5.76

5.32

130 × 456

8.44

7.63

7.10

7.63

6.89

6.41

7.10

6.41

5.97

6.71

6.07

5.65

6.41

5.80

5.39

Notes to Table A-16:

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

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

(3)Top edge of lintel assumed to be fully laterally supported.

(4)Supported length means half the length of trusses or rafters, plus the length of overhang beyond the wall.

(5)For intermediate supported lengths, straight interpolation may be used.