Steel frame supports horizontal rebars for cast in place concrete beam. Top steel is supported at proper height by a transverse rebar, and height can be adjusted by small chain fall. Top steel supports U stirrups, which can themselves support horizontal bottom steel. Note that steel rebar cage sags under its own weight and requires additional support along its length. Colorado Street, Denver, Colorado, December 4, 2006.
constructionconcreteresteelrebarreinforcingsteelstirrupbeamgradesupportcast in placegrade beamDenverColoradoDecember20062718resteel support 2718
From Concrete Construction: reinforcing, forms, saw, shore, precast, erect