Which deck type uses sawn lumber transversely post-tensioned with high-strength steel bars?

Which deck type uses sawn lumber transversely post-tensioned with high-strength steel bars?

• A. Plan deck
• B. Stress laminated
• C. Nail laminated deck
• D. Cast-in-place

Answer: (B)

Stress-laminated decks rely on sawn lumber laid across the span and then post-tensioned with high-strength steel bars to create a prestressed composite panel. After the layers are put together, the steel bars are tensioned, compressing the wood and making the deck act as one stiff member. This pre-compression increases bending strength and stiffness, reduces deflection, and allows longer spans with fewer members than other timber deck systems. The defining features are transverse sawn lumber and post-tensioning with steel bars. Other options use simple lamination with nails or use concrete, not this prestressed timber approach.

Stress-laminated decks rely on sawn lumber laid across the span and then post-tensioned with high-strength steel bars to create a prestressed composite panel. After the layers are put together, the steel bars are tensioned, compressing the wood and making the deck act as one stiff member. This pre-compression increases bending strength and stiffness, reduces deflection, and allows longer spans with fewer members than other timber deck systems. The defining features are transverse sawn lumber and post-tensioning with steel bars. Other options use simple lamination with nails or use concrete, not this prestressed timber approach.