Calculate the number of concrete blocks needed for a project by determining the number of blocks to complete a row and the rows to reach the desired height. Standard blocks are 8 inches by 16 inches, including the mortar joints.Know More
To determine the number of blocks per row, a mason first measures the length of a wall in feet. He rounds any measurements over an even foot to the next number and determines the number of blocks each row requires by multiplying the measurement by 0.75. He calculates the number of rows by multiplying the height of the wall by 1.5. The total number of blocks to complete the project is the product of the blocks in a row times the number of rows. Concrete block suppliers recommend adding 5 to 10 percent to account for breakage and errors.
Manufacturers state the size of the block using width by height by length, so a 6 x 8 x 16 concrete block has a face size of 8 inches high and 16 inches long with a 6-inch width. While the face size remains the same for most concrete blocks, thickness varies but does not affect the number of blocks needed. If using blocks with a nonstandard face size, the mason converts the factors by dividing both height and width by 12.Learn more about Building Materials
Concrete blocks, also known as concrete masonry units, cinder blocks and breeze blocks, come in a number of sizes, depending on the country of origin. Standard U.S. blocks, used throughout most of the world, are 16 inches long by 8 inches wide by 8 inches tall.Full Answer >
The best way to install caps on retaining walls is to use a masonry saw to cut the blocks for a tight fit, ensuring a smooth surface, especially if there are curves in the wall. A properly capped retaining wall provides a bench-like surface that is sturdy enough to support anyone wanting to sit on the wall.Full Answer >
Volcanic ash, pumice, cinder, lapilli, blocks and bombs are all examples of pyroclastic material. Rocks and magma are pulverized by volcanic explosions to create the different types of materials.Full Answer >
In general, load-bearing blocks must be able to withstand 2,500 to 3,000 psi (pounds per square inch) upon manufacture. However, since concrete blocks come in a range of sizes and shapes, their load-bearing capacity varies, therefore builders should test each specific type of block they plan to use.Full Answer >