How to use the Slide Rule Construction Material Calculators.
How to use the Concrete Slide Rule Calculator.
How to use the Sand, Gravel and Crushed Stone Calculator.
How to use the Concrete Block (CMU) Slide Rule Calculator.
How to use the Brick Wall Slide Rule Calculator.
Slide the rule to line up the number 2 on the height of wall scale with the number 20 on the length of wall scale. Look down towards the bottom edge of the slide rule where it says "bricks required" and you will see the word standard. The arrow points to the number of standard brick required to build the wall. 290 pieces.