What do the 7 and the 4 in the equation for masonry stand for?

I have just recently learned a little bit about masonry in my math class and they gave an equation for how many bricks you will need, and part of it consists of 7 x (thickness) / 4. I would like to know what the 7 and the 4 are for.

They appear to be constants! Perhaps to do with the length and width of the bricks.

This entry was posted on Saturday, February 13th, 2010 at 1:36 am and is filed under masonry. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

One Response to “What do the 7 and the 4 in the equation for masonry stand for?”

bearcat on February 13th, 2010 at 7:19 am

They appear to be constants! Perhaps to do with the length and width of the bricks.
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