RCC construction structure CAD drawing includes a pipe of diameter not more than 6", passing through a RCC beam, the reinforcement must be as shown below, for pipes of diameter larger than 6", passing through a RCC beam, reinforcement must be approved by the designer, if a pipe passes vertically through a RCC. beam, width of beam must be increased to be at least equal to the pipe diameter for the full length of the beam. download free RCC structure drawing DWG file.