NCIDQ IDFX Practice Exam

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Which type of joist consists of a plywood web with solid/laminated chords?

Solid wood joists
Plywood web joists
Glulam beams
Metal joists

The correct answer is: Plywood web joists

The option that consists of a plywood web with solid or laminated chords is the one that specifically utilizes the structural advantages of plywood in its web design. This type of joist is engineered to provide a balanced combination of strength and stability while being relatively lightweight. Plywood webs allow for efficient load transfer and can span greater distances compared to solid wood, while the solid or laminated chords offer enhanced load-carrying capability and rigidity. This construction approach is particularly advantageous in residential or light commercial applications where both strength and material efficiency are crucial. In summary, the correct answer highlights the unique design and structural benefits of using plywood webs in joist construction, facilitating better performance in various architectural applications.