Question: 3 . 7 A pair of reinforced rectangular beams b = 4 0 c m , h = 6 5 c m , with pressure

3.7 A pair of reinforced rectangular beams b=40cm,h=65cm, with pressure bars 2-D25 arranged in a single layer, d'=6.5cm, tension bars 8-D25 arranged in a double layer, d=56.0cm,f'=280kgfcm?f=4,200kgflcm? The design bending moment strength of this section M and the stress of the pressure bar are calculated.
3 . 7 A pair of reinforced rectangular beams b =

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