A nominal 8" x 8" x 16" block is actually ________.

The nominal dimensions of a concrete block, such as an 8" x 8" x 16" block, are not the precise measurements of the block itself. The actual dimensions are slightly smaller to account for the thickness of the mortar joint that will be used when the blocks are laid.

For a nominal 8" x 8" x 16" block, the actual dimensions are typically 7-5/8" x 7-5/8" x 15-5/8". This adjustment allows for the mortar to be applied and ensures that the overall wall or structure is built to the correct size when several blocks are used together.

This understanding is essential for contractors and builders as it affects calculations for material quantities, structural integrity, and the final dimensions of walls and other constructions. Hence, the actual size of a nominal 8" x 8" x 16" block being 7-5/8" x 7-5/8" x 15-5/8" is accurate and reflects standard practices in the masonry industry.