At what value (nearly) is the maximum spacing of purlins for standard ...
Maximum spacing of Purlins for Asbestos Roofing Sheets
Asbestos roofing sheets are commonly used in construction due to their durability and fire-resistant properties. Purlins are horizontal structural members used to support these roofing sheets. The maximum spacing of purlins for standard asbestos roofing sheets is an important factor to ensure the roof's stability and safety. The correct answer to this question is option 'B,' which is 1.4 m.
Factors Affecting Maximum Spacing of Purlins
Several factors affect the maximum spacing of purlins for asbestos roofing sheets. Some of these factors are:
- Roof slope: The slope of the roof affects the maximum spacing of purlins. For steeper slopes, purlins need to be placed closer to each other.
- Load: The weight of the roofing sheets and other loads, such as snow, wind, and debris, affect the maximum spacing of purlins. Higher loads require closer spacing of purlins.
- Material of purlins: The material used for purlins affects their strength and stiffness, which, in turn, affects the maximum spacing of purlins.
- Spacing of rafters: The spacing of rafters affects the maximum spacing of purlins. Closer spacing of rafters allows for greater spacing of purlins.
Importance of Maximum Spacing of Purlins
The maximum spacing of purlins is crucial to ensure the stability and safety of the roof. If the purlins are spaced too far apart, the roofing sheets may sag or even collapse under the weight of the load. This can cause significant damage to the building and endanger the occupants.
Conclusion
In conclusion, the maximum spacing of purlins for standard asbestos roofing sheets is 1.4 m. This spacing is determined by several factors, such as roof slope, load, material of purlins, and spacing of rafters. It is important to ensure that the purlins are spaced correctly to ensure the stability and safety of the roof.
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