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OBC 2006 › Division B

9.20.5.2.

Version 1 — in force 1 January 2010

In force · amended
Verified · covered Verified against the 2010-01-01–2010-03-31 consolidation, whose range covers the query date. How to read this

Provenance

OBC 1997 · continues from 9.20.5.2. — Pro

Base · O. Reg. 350/06 · ext v0 →

O. Reg. 503/09, cl. 164 · ext ← current

In force 2010-01-01

OBC 2012 · continues as 9.20.5.2. — Pro

9.20.5.2. — Lintels or Arches

(1) Masonry over openings shall be supported by steel, reinforced concrete lintels or masonry arches designed to support the imposed loads.

(2) Except as permitted in Sentences (3) and (6), steel angle lintels supporting masonry above openings shall conform to Table 9.20.5.2.A.

(3) Steel angle lintels supporting masonry veneer above openings shall conform to Table 9.20.5.2.B.

(4) Steel lintels described in Sentences (2) and (3) shall,

(a) have even and level bearing and shall have not less than 150 mm length of bearing at end supports, and

(b) bear on masonry, concrete or steel.

(5) Steel angle lintels supporting masonry shall be primed or painted or otherwise protected from corrosion.

(6) Steel beams supporting masonry veneer and wood stud walls above openings shall conform to Table 9.20.5.2.C.

(7) Steel beams described in Sentence (6) shall be supported at each end by a steel column, and have a minimum 6 mm plate welded to the flange to support the masonry veneer.

Notes toTable 9.20.5.2.C.:

(1)These spans assume that the beam supports the veneer, a wood stud wall and a maximum specified roof live load of 2.3 kN/m.

(2)Where the steel beam carries floor loads or larger roof loads, refer to Article 9.23.4.3.v1

Editor's note

O. Reg. 503/09 amends Table 9.20.5.2.A. effective January 1, 2010 (adding the unit 'mm' to the angle-dimension column headings) but does not change the notes to Table 9.20.5.2.c., so the e-Laws consolidation differences in those notes described for the prior version carry forward to this version.

Text · e-Laws consolidated snapshot

Table 9.20.5.2.A. Loose Steel Lintels for Masonry – No. & Size of Angles Required(7) Forming Part of Sentence 9.20.5.2.(2)

Column 1

Column 2

Column 3

Column 4

Col. 5

Col. 6

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Clear Span(1)(3)

Exterior Angles, mm

Wall Thickness,mm

Interior Angles, mm

for Brick

for Stone

Maximum Floor Loads per Metre of Span in Newtons(2)(4)(5)

100 mm

100 mm + 50 mm stone facing

None

3 650

7 300

10 950

14 600

18 250

21 900

No Floor Load

1 200 mm or less

L-90 × 90 × 6

L-125 × 90 × 8

203

L-90

L-90

L-90

L-100

L-125

L-125

L-125

× 90

× 90

× 90

× 90

× 90

× 90

× 90

× 6

× 6

× 8

× 8

× 8

× 10

× 13

305

2Ls-90

2Ls-90

2Ls-90

2Ls-90

2Ls-90

2Ls-100

2Ls-100

× 90

× 90

× 90

× 90

× 90

× 90

× 90

× 8

× 8

× 8

× 8

× 8

× 8

× 8

1 500 mm

L-90 × 90 × 8

L-125 × 90 × 8

203

L-90

L-90

L-125

L-125

L-125

L-150

—

× 90

× 90

× 90

× 90

× 90

× 90

—

× 8

× 8

× 8

× 10

× 13

× 10

—

305

2Ls-90

2Ls-90

2Ls-90

2Ls-125

2Ls-125

2Ls-125

2Ls-125

× 90

× 90

× 90

× 90

× 90

× 90

× 90

× 8

× 8

× 8

× 8

× 8

× 8

× 10

1 800 mm

L-100 × 90 × 8

L-125 × 125 × 8

203

L-100

L-125

L-125

L-150

× 90

× 90

× 90

× 100

× 8

× 8

× 8

× 10

305

2Ls-100

2Ls-100

2Ls-125

2Ls-125

2Ls-125

2Ls-150

2Ls-150

× 90

× 90

× 90

× 90

× 90

× 100

× 100

× 8

× 8

× 8

× 8

× 10

× 10

× 10

2 100 mm

L-100 × 90 × 8

L-125 × 125 × 8

203

L-100

L-125

L-150

× 90

× 90

× 100

× 8

× 10

× 10

305

2Ls-100

2Ls-125

2Ls-125

2Ls-150

2Ls-150

× 90

× 90

× 90

× 100

× 100

× 8

× 10

× 10

× 10

× 10

2 400 mm

L-125 × 90 × 8

L-125 × 125 × 8

203

L-125

L-150

× 90

× 100

× 8

× 10

305

2Ls-125

2Ls-125

2Ls-150

× 90

× 90

× 100

× 8

× 13

× 10

2 700 mm

L-125 × 90 × 10

L-125 × 125 × 10

203

L-125

× 90

× 10

305

2Ls-125

2Ls-150

× 150

× 100

× 10

× 10

3 000 mm

L-150 × 100 × 10

L-125 × 125 × 13

203

L-150

× 100

× 10

305

2Ls-150

× 100

× 10

Notes to Table 9.20.5.2.A.:

(1)See Sentence 9.20.5.2.(4).

(2)Omit floor load in lintel when distance to bottom of floor construction is greater than width of opening.

(3)Interior and exterior angles in 200 mm walls and interior angles in 300 mm walls are bolted together when clear span is over 1 800 mm.

(4)When masonry lighter than brick is used over interior angles floor load may be increased by the difference in weight per square metre times the width of the opening. Not generally available.

(5)Interior angles have been designed for floor load plus brick masonry of height equal to width of opening.

(6)fs = 138 Mpa., Deflection maximum = 1/700 span.

(7)The figures in the Table indicating wall thickness and angle cross-section are in mm.

Table 9.20.5.2.B. Maximum Allowable Spans for Steel Lintels Supporting Masonry Veneer, m Forming Part of Sentence 9.20.5.2.(3)

Column 1

Column 2

Column 3

Column 4

Column 5

Column 6

Minimum Angle Size, mm

70 mm

90 mm

100 mm

Vertical Leg

Horizontal Leg

Thickness

Brick

Brick

Stone

90

75

6

2.55

—

—

90

90

6

2.59

2.47

2.30

100

90

6

2.79

2.66

2.48

125

90

8

3.47

3.31

3.08

125

90

10

3.64

3.48

3.24

125

90

13

3.82

3.59

3.33

150

90

10

4.06

3.82

3.54

150

90

13

4.32

4.07

3.77

150

100

13

4.37

4.12

3.82

180

100

10

4.57

4.30

3.99

180

100

13

4.87

4.59

4.25

Table 9.20.5.2.C. Maximum Allowable Spans for Steel Beams Supporting Masonry Veneer, m(1), (2) Forming Part of Sentence 9.20.5.2.(6)

Column 1

Column 2

Column 3

Column 4

Section

70 mm Brick

90 mm Brick

100 mm Stone

W 150 × 22

4.23

4.09

3.92

W 150 × 30

4.68

4.52

4.32

W 200 × 27

5.26

5.08

4.84

W 200 × 31

5.57

5.37

5.11

W 200 × 36

5.70

5.49

5.23