Shanghai
No 425, Hongfeng Road, Pudong New Area,
Shanghai 201206
Tel: 021-5030-1126
Fax: 021-3382-0405
Beijing
Room 1507, Kuntai International Mansion,
No.12 B Chaowai Street,
Beijing 100020
Tel: 86-10-59251255
Fax: 86-10-59251258
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Spans - For use in Canada
The following tables are calculated spans for exterior deck built-up beams. Please read notes included with tables before using. Not-incised built-up spans can be applied to non-treated wood as well.
Exterior Deck - Beam Selections
Lumber not incised
Post
Spacing |
Joist
Span |
Species |
| D.Fir-L |
Hem-Fir |
S-P-F |
North Species |
| 1.2m (4ft) |
2.4m (8ft) |
1-38 x 140 |
1-38 x 140 |
1-38 x 140 |
1-38 x 140 |
| 2.7m (9ft) |
1-38 x 140 |
1-38 x 140 |
1-38 x 140 |
1-38 x 140 |
| 3.0m (10ft) |
1-38 x 140 |
1-38 x 140 |
1-38 x 140 |
1-38 x 140 |
| 3.3m (11ft) |
1-38 x 140 |
1-38 x 140 |
1-38 x 140 |
1-38 x 184 |
| 3.7m (12ft) |
1-38 x 140 |
1-38 x 140 |
1-38 x 140 |
1-38 x 184 |
| 4.3m (14ft) |
1-38 x 184 |
1-38 x 140 |
1-38 x 140 |
1-38 x 184 |
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| 1.8m (6ft) |
2.4m (8ft) |
1-38 x 184 |
1-38 x 184 |
1-38 x 184 |
1-38 x 235 |
| 2.7m (9ft) |
1-38 x 184 |
1-38 x 184 |
1-38 x 184 |
1-38 x 235 |
| 3.0m (10ft) |
1-38 x 235 |
1-38 x 184 |
1-38 x 184 |
1-38 x 235 |
| 3.3m (11ft) |
1-38 x 235 |
1-38 x 235 |
1-38 x 235 |
2-38 x 184 |
| 3.7m (12ft) |
1-38 x 235 |
1-38 x 235 |
1-38 x 235 |
2-38 x 184 |
| 4.3m (14ft) |
2-38 x 184 |
1-38 x 235 |
1-38 x 235 |
2-38 x 184 |
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| 2.4m (8ft) |
2.4m (8ft) |
2-38 x 184 |
1-38 x 235 |
1-38 x 235 |
2-38 x 184 |
| 2.7m (9ft) |
2-38 x 184 |
2-38 x 184 |
2-38 x 184 |
2-38 x 235 |
| 3.0m (10ft) |
2-38 x 184 |
2-38 x 184 |
2-38 x 184 |
2-38 x 235 |
| 3.3m (11ft) |
2-38 x 184 |
2-38 x 184 |
2-38 x 184 |
2-38 x 235 |
| 3.7m (12ft) |
2-38 x 235 |
2-38 x 184 |
2-38 x 184 |
2-38 x 235 |
| 4.3m (14ft) |
2-38 x 235 |
2-38 x 235 |
2-38 x 235 |
2-38 x 286 |
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Notes
- Design based on 2001 CAN/CSA O86.
- Live load = 1.9kPa, Dead Load = 0.5 kPa.
- Lumber No.2 and better grade, pressure treated, wet service condition.
- Beam selection is given as: number of plies - ply thickness (mm) x ply depth (mm)
- Beam selection is given for a beam on the edge of the deck as shown in the figure below.
When a beam is in the middle of the deck supporting joists on both sides of the beam, double the number of plies shown in the table.
- Nail built-up beams so that it acts as a single member as shown in the figure below.
- Minimum post size 89 x 89mm, for posts up to 2m high, and wide enough to support all beam plies.
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