How many 33⁄4 × 21⁄4 × 8 in. (95 × 57 × 203mm) bricks are required for a double wythe wall 8 ft (2.44 m) high ×

30 ft (9.14 m) wide having one opening 48 × 72 in.

(1220 × 1830 mm) and three openings 26 × 48 in. (660 ×

1219 mm). Mortar joints are 1⁄2 in. (13mm). Allow 3%

for brick waste.