|
Size (mm) |
Sheet Roof Single Span – Roof load Width (m) |
|||||||
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
|
140×42 |
4.0 |
3.2 |
2.7 |
2.5 |
2.2 |
2.1 |
1.9 |
1.8 |
|
190×42 |
5.4 |
4.3 |
3.7 |
3.3 |
3.1 |
2.8 |
2.6 |
2.5 |
|
240×42 |
6.6 |
5.4 |
4.7 |
4.2 |
3.9 |
3.6 |
3.3 |
3.2 |
|
290×42 |
7.5 |
6.4 |
5.7 |
5.1 |
4.7 |
4.3 |
4.1 |
3.8 |
|
140×65 |
4.6 |
3.7 |
3.2 |
2.8 |
2.6 |
2.4 |
2.2 |
2.1 |
|
190×65 |
6.1 |
4.9 |
4.3 |
3.8 |
3.5 |
3.3 |
3.1 |
2.9 |
|
240×65 |
7.2 |
6.1 |
5.4 |
4.8 |
4.4 |
4.1 |
3.9 |
3.7 |
|
290×65 |
8.2 |
7.0 |
6.3 |
5.8 |
5.4 |
5.0 |
4.7 |
4.4 |
|
240×80 |
7.4 |
6.4 |
5.7 |
5.2 |
4.7 |
4.4 |
4.1 |
3.9 |
|
Size (mm) |
Sheet Roof Continuous Span – Roof load Width (m) |
|||||||
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
|
140×42 |
5.5 |
3.9 |
3.2 |
2.7 |
2.4 |
2.2 |
2.0 |
1.8 |
|
190×42 |
7.0 |
5.3 |
4.3 |
3.7 |
3.3 |
2.9 |
2.7 |
2.5 |
|
240×42 |
8.3 |
6.5 |
5.3 |
4.5 |
4.1 |
3.7 |
3.4 |
3.2 |
|
290×42 |
9.4 |
7.6 |
6.2 |
5.3 |
4.7 |
4.3 |
4.0 |
3.7 |
|
140×65 |
6.2 |
4.8 |
3.9 |
3.4 |
3.0 |
2.7 |
2.5 |
2.3 |
|
190×65 |
7.7 |
6.5 |
5.3 |
4.6 |
4.1 |
3.7 |
3.4 |
3.1 |
|
240×65 |
9.0 |
7.7 |
6.7 |
5.8 |
5.1 |
4.6 |
4.3 |
3.9 |
|
290×65 |
10.3 |
8.8 |
8.0 |
7.0 |
6.2 |
5.6 |
5.1 |
4.8 |
|
240×80 |
9.4 |
8.1 |
7.3 |
6.4 |
5.7 |
5.1 |
4.7 |
4.4 |
Span values are in metres
Loading Data:
- Dead Load of roof and ceiling maximum 40 kg/m2 for sheet roof with ceiling.
- (Covers standard up to metal sheet roofing, plasterboard ceiling below, roof trusses or raftered roof)
- Roof Live Load of 0.25kPa. Wind design for up to N3 wind area, in accordance with AS4055-2006 – Wind Loads for Housing. ETH LAM GL 17 beams are manufactured straight, without any camber built into the beams. Roof Beam design criteria in accordance with methods presented in AS1684.1-1999, and structural timber design in accordance with AS1720.1-2010.
Notes:
- Minimum bearing lengths for support of roof beams: 45mm on end spans, and 65mm internal spans.
- The span value shown is the distance between centrelines of supports.
- For continuous spans, the adjacent roof beam spans may be different, but look up the larger of the spans, and the shorter span must be more than 50% of the larger span. If this rule is not met, then consider the roof beams are simply supported, and look up the larger span in the single span table.
- Deflection criteria: for permanent load combinations, the lesser of Span/300, or 20mm, and for Roof Live Loads, the lesser of Span/250.
- For roof beams the lateral restraint is assumed to be a supported rafter or truss spacing at 900mm centres. The roof beam spans are suitable for unrestrained bottom edges.
- Where there are conflicts in design between loading codes (AS/NZS1170 series), timber code (AS1720.1-2010) and AS1684.1-1999, the loading codes and timber codes take preference.
Download Span Table as acrobat pdf.
Click below to find out more or contact us on: John Carroll 0414301515 and Colin Carroll 0421273887
Email for a price or more information: John@carrollswholesale.com, Colin@carrollswholesale.com
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