Shaw Book - Volume 1 Mar. 2016 | Page 43

034_045ACACFoxStudios 10/21/04 7:24 PM Page 41 planter seat wall White cement stairs and planter walls. walk Plan view conceptual design of garden terrace. 41 On Structural Concrete Construction Topping slabs and architectural walls on structural concrete must be constructed on drain board material to prevent: 1. Surface drying tension resulting in slab curling and displacement. 2. Trapped subsurface water. 3. Dark areas in the surface of topping slabs caused by entrapped moisture. Entire Garden Terrace is constructed over drain board, over water proofing, over structure deck. 4. Positive slope of 1 percent is recommended on structural slabs to aid drainage and to prevent entrapped moisture. Cast-in-place wall Leveling and protection slab or topping slab Drain board Fluid applied waterproofing Structural slab Drain with secondary body