Copyright Goodheart-Willcox Co., Inc. 426 45. The standard subsurface depth for driveways is _____. A. 4″ to 6″ B. 6″ to 8″ C. 8″ to 12″ D. 12″ to 13″ 46. The action of applying material over the top of a newly installed hardscape to fi ll in voids between the hardscape materials is referred to as _____. A. dry-laying B. wet-laying C. face mixing D. topdressing 47. Calculate the number of 2 × 4 boards needed to construct the large area of the wood deck. The large area is 10′ × 4′ with no spacing between the boards. Each 2 × 4 is 3.5″ wide and 8′ long. 48. Calculate the number of 2 × 6 boards needed to construct the small area of the wood deck. The small area is 4′ × 5′ with a 2″ gap between boards. Each 2 × 6 is 5.5″ wide and 8′ long. 49. Calculate the square footage of the fi ve fl agstone pathways. The compacted aggregate is 4″ deep and the fi ne aggregate is 2″ deep. The measurements for the pathways are 12′ × 3′ , 3′ × 3′ , 8′ × 5′ , 14′ × 3′ , and 60′ × 3′. Include 10% overage to ensure you will have enough materials. 50. Calculate the square footage of the concrete border at ground level/grade. There are three different border areas with a consistent width of 2′. The compacted aggregate is 6″ deep and the concrete is 4″ deep. The areas measure 10′ × 2′ , 32′ × 2′ , and 9′ × 2′. Include 10% overage in the total square footage. Anne Spafford, NC State University 14′ length 4′ 4′ 5′ 10′ 2 ′ 9′ 3′ 5′ 14 ′ length 8′ 3′ 3 ′ 12 ′ 8′ 60′ 32′ 3′ 4 ′ 10 ′ 4 ′ 5 ′ Materials Wood deck Flagstone pathways Concrete border Stamped/dyed concrete