Core TradesCâu 172 / 700
Tooled or sawn control (contraction) joints are placed in a concrete slab-on-grade PRIMARILY to:
a.Increase the load-carrying capacity of the slab
b.Provide a decorative surface pattern
c.Allow the slab to expand upward during hot weather
d.Control where shrinkage cracking occurs by creating planned weak planes
Giải thích
Control joints create planned weakened planes so drying-shrinkage cracks form neatly along the joint rather than randomly across the slab. They do not add structural capacity, are not primarily decorative, and are for shrinkage control rather than upward expansion.
Trích dẫn luật: 2025 CA Building Code, Chapter 19 (Concrete)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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