What does maximum gradual ¼ in ft refer to when inspecting a concrete deck?

• A. Thickness of the deck
• B. Levelness of the surface
• C. Drainage slope
• D. All of the above

Answer: (C)

The term "maximum gradual ¼ in ft" when inspecting a concrete deck specifically refers to the drainage slope. This measurement indicates that for every foot of horizontal distance, the elevation should change by no more than ¼ inch. A proper drainage slope is crucial for ensuring that water does not pond on the surface of the deck, which could lead to leaks, structural issues, or deterioration over time.

While the thickness of the deck and levelness of the surface are important considerations in a concrete deck’s construction, the term "maximum gradual ¼ in ft" specifically pertains to how the surface is sloped to facilitate effective drainage. This emphasis on maintaining the correct slope is vital to the longevity and functionality of the roofing system.