The continuous beam shown in Figure has been designed to carry a service dead load of 2.25 kips/ft including self-weight and service live load of 3.25 kips/ft. Flexural design has been based on ACI moment coefficients of and 16 at the face of support and midspan, respectively, resulting in a concrete section with b = 14 in. and d = 22 in. Negative reinforcement at the support face is provided by four No. 10 (No. 32) bars, which will be cut off in pairs where no longer required by the ACI Code. Positive bars consist of four No. 8 (No. 25) bars, which will also be cut off in pairs. Specify the exact point of cutoff for all negative and positive steel. Specify also any supplementary web reinforcement that may be required. Check for satisfaction of ACI Code requirements at the point of inflection, and suggest modifications of reinforcement if appropriate. Material strengths are fy = 60,000 psi and f′c = 4000 psi.

 

4 No. 10 (No. 32) 4 No. 10 (No. 32) 0" 0" 4 No. 8 (No. 25) 24'-0"