Will a 1/4 in think angle iron work on a 9ft opening with 3 or 4 course of hollow block above it thw pieces I have are 12ft long and 3x3x1/4 blocks are 8x8x16 no roof wieght bearing on wall
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Uh, the thickness of the metal is less important than the dimensions of the ell. You need to support 800-1000 pounds. There are some calculators online, but I haven't worked my way through them.
no way
just too check.
section mod = 0.56
moment = = w*lsq/8 = 52k
w= about 20# inch = 12 in long block, 4 courses * 60 # block?
l == 144
52k needs to be less than 20ksi*0.56 = no
now, the 20ksi is code allowable, yield say 70ksi
still likly to bend unless reall light weight block (< 10#/block)
Also i was going to put one on each side