Determine the number of 8-inch-high by 8-inch-wide by 16-inch-long concrete (CMU) blocks required to complete 250 feet of the fence whose cross section is shown in Figure 12.22. If lintel blocks are required wherever the #4 horizontal bars are located, how many plain blocks and how many lintel blocks are needed for the wall?
What will be an ideal response?
Find the area of the wall as follows:
Wall area (sf) = 250? × 6?8? = 1,667 sf
There are 1.125 block per sf.
Number of blocks = 1,667 sf × 1.125 blocks per sf = 1,875 blocks
There are two rows of lintel blocks, one at 4? and one at 6?8?.
Lintel blocks = 2 × 250? × 12 in per ft / 16? = 375 lintel blocks
Plain blocks = 1,875 blocks – 375 blocks = 1,500 plain blocks
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