Problems 2 and 3 refer to the floor plan shown in Fig. 2. ta СІ C2 C3 C4 CS GI (typ.) C6 C7 C8 Given: L = 25' (typ.) and S=10 (typ.). So, the overall floor plan = 75' x 60 The beam width (bw) and depth (h) of B1 (typ.) are taken to be 10-in and 20-in, respectively. L Misi (typ) Bl (typ) B1 (typ.) 8 C9 CIO CIT C12 A typical girder, e.g., G1, has a width (bw) of 12-in. GI (typ) C13 C14 C15 C16 Fig. 2 - Floor Plan for Problems 2 & 3.
Problem 3. The beams, e.g., B1 (typ.), are also cast with fé' = 5,000 psi (normal weight concrete, 150 pcf. B: = 0.8). Use d = h-3", for both positive and negative bending. (a) (10 points) Determine per AC1318 the effective flange width (be or b) of a typical beam, B1, subjected to positive bending. (b) (20 points) Use where applicable a be (or by) of 76-in (i.e., ignore the one calculated in part (a)}, compute the minimum flexural reinforcement required (i.e., As min) and its corresponding design bending (OM) of B1 for positive bending only. (c) (20 points) Use where applicable a be (or bi) of 76-in [i.e., ignore the one calculated in part (a)], compute the maximum flexural reinforcement required (i.e., As max) and its corresponding design bending (OM.) of 81 for positive bending only. Use & = 0.005.
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