Section Properties
|
Negative Bending |
Positive Bending |
| 26 |
80 |
.89 |
0.0099 |
0.0186 |
0.67 |
0.0080 |
0.0080 |
0.93 |
| 29 |
80 |
.56 |
0.0066 |
0.0124 |
0.44 |
0.0065 |
0.0185 |
0.67 |
Notes:
1. Section Properties and allowable stresses are calculated in accordance with the 1986 AISI specifications for light gauge structural members.
2. Steel minimum yield strength is 80 KSI conforming to ASTM A446-85.
3. Values shown as allowable loads are based on panel covering three equal spans. Multiply by 0.8 for two span allowable loads.
4. Allowable loads for wind have been increased by 33%. Panel weight has not been deducted. Minimum bearing length must be checked.
5. For agricultural structures the UBC and SBCCI building codes require a minimum of 10 PSF roof live loads.
6. Deflection loads are limited by a maximum deflection ratio of L/180 of span.