Q:

How can the amount of concrete blocks needed for a project be calculated?

A:

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.

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.


Is this answer helpful?

Similar Questions

  • Q:

    How many 90-pound bags of concrete are needed for 3 cubic feet?

    A:

    It requires two 80-pound bags of standard concrete mix for a 4- to 6-inch-thick concrete slab that is 2.0801 square feet, which is equal to 3 cubic feet. So, two 90-pound bags of concrete should get the job done.

    Full Answer >
    Filed Under:
  • Q:

    How many blocks are in a square meter?

    A:

    The number of blocks in a square meter depends on the size of each block. Because the square meter is a measurement of area, the length and width of the block must be given in International System of Units notation. The spelling of meter is metre in this notation.

    Full Answer >
    Filed Under:
  • Q:

    What are ecology blocks?

    A:

    Ecology blocks are concrete blocks made from leftover or unused concrete. Instead of dumping out unused concrete that is otherwise wasted, companies cast these blocks in 1-square-yard or half-square-yard sizes. Full-size ecology blocks weigh between 3,000 and 4,000 pounds each, and half-blocks weigh between 1,500 and 2,000 pounds.

    Full Answer >
    Filed Under:
  • Q:

    What is lean concrete?

    A:

    Lean concrete is a mix where the amount of cement is lower than the amount of liquid present in the strata. This makes it ideal as a base layer where other kinds of concrete are placed on top. It is good for providing a flat bottom in uneven or dirt terrain.

    Full Answer >
    Filed Under:

Explore