Small openings in concrete walls require one number five reinforcing bar placed all around each layer of reinforcement. The maximum opening size is three feet by three feet. Wall bars extend two feet six inches typically, with termination details referenced to the wall end detail.
ADD (1) #5 ALL AROUND FOR EA LAYER OF REINF 3'-0"x3'-0" MAX OPNG WALL REINF, SEE "WALL END" DET FOR TERMINATION OF WALL BARS 2'-6" , TYP SEE NOTE 3
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