Roof decking is attached to which structural member in the described plan?

Roof decking is attached to which structural member in the described plan?

• A. rafters
• B. trusses
• C. purlins
• D. joists

Answer: (B)

The correct choice is that roof decking is attached to trusses. Trusses serve as a framework that supports the roof and its necessary components. They are engineered to bear loads and provide structural stability across spans. The roof decking, which is often made of plywood or oriented strand board (OSB), is then affixed to the top chords of the trusses. This contributes to the roof’s overall strength and serves as a base for roofing materials, ensuring that the decking performs its function of providing a solid surface to support the roofing system and protect against weather elements. Although rafters and joists are also structural members, they typically belong to different roofing and flooring systems, respectively. Rafters are inclined members that often support the roof covering directly, while joists support floors. Purlins are members used to support the roof decking between the rafters or trusses but are not the primary member to which the decking itself is directly attached. Therefore, trusses are the most accurate structural members to which roof decking is affixed in the discussed scenario.

The correct choice is that roof decking is attached to trusses.

Trusses serve as a framework that supports the roof and its necessary components. They are engineered to bear loads and provide structural stability across spans. The roof decking, which is often made of plywood or oriented strand board (OSB), is then affixed to the top chords of the trusses. This contributes to the roof’s overall strength and serves as a base for roofing materials, ensuring that the decking performs its function of providing a solid surface to support the roofing system and protect against weather elements.

Although rafters and joists are also structural members, they typically belong to different roofing and flooring systems, respectively. Rafters are inclined members that often support the roof covering directly, while joists support floors. Purlins are members used to support the roof decking between the rafters or trusses but are not the primary member to which the decking itself is directly attached. Therefore, trusses are the most accurate structural members to which roof decking is affixed in the discussed scenario.