A concrete masonry unit has actual gross dimensions of 7@5/8′′ * 7@5/8′′ *
7@5/8′′. The unit is tested in a compression machine with the following results:
Maximum failure load = 81,000 lb
Net volume = 294.2 in3
a. Is the unit categorized as solid or hollow? Why?
b. Calculate the gross area compressive strength.
c. Calculate the net area compressive strength.