Question: f c ' = 4 0 0 0 NWC , Grade 6 0 sted ( a ) M c r = ? ( b )

fc'=4000
NWC, Grade 60 sted
(a)Mcr=?
(b)ftop=?,fbot=?
if M=30ft-k
f c ' = 4 0 0 0 NWC , Grade 6 0 sted ( a ) M c r

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