How many units are required per 100 ft² of wall area for 8 x 8 x 16 units?

To determine how many 8 x 8 x 16 concrete masonry units (CMUs) are needed per 100 square feet of wall area, first calculate the area of a single unit. The dimensions given indicate that each unit is 8 inches high and 16 inches long.

To find the area of one unit:

1. Convert the dimensions from inches to feet. Since there are 12 inches in a foot:

• Height: 8 inches ÷ 12 = 0.67 feet

• Length: 16 inches ÷ 12 = 1.33 feet

2. Multiply these dimensions to obtain the area:

• Area of one unit = Height × Length = 0.67 feet × 1.33 feet ≈ 0.89 square feet.

Next, to find the number of units required for a wall area of 100 square feet, divide the total wall area by the area of one unit:

• Number of units = Wall area ÷ Area of one unit = 100 ft² ÷ 0.89 ft² ≈ 112.5 units.

This calculation shows that approximately 112.5 units are needed to cover an area of 100 square feet,