Reinforced concrete wall openings require specific header and jamb bar configurations with double curtain reinforcing to maintain structural integrity. The head detail incorporates U-ties matching the vertical bar size and spacing, along with lap splices per schedule. Additional top and bottom bars are provided based on the opening width, ranging from two number five bars for openings up to six feet wide, up to two number seven bars for widths up to sixteen feet unless noted otherwise. The end of wall or jamb detail includes a second row of bars where applicable and supplementary bars sized according to the opening width.
LAP SPLICE PER SCHEDULE LAP SPLICE PER SCHEULDE END OF WALL OR JAMB BARS DOUBLE CURTAIN HEAD BARS DOUBLE CURTAIN PROVIDE 2-#7 FOR OPENINGS UP TO 12'-0" WIDE - 4-#7 FOR OPENINGS UP TO 16'-0" WIDE, UNO SECOND ROW OF BARS WHERE OCCURS "U" TIES TO MATCH VERT SIZE AND SPACING PROVIDE 2-#5 FOR OPENINGS UP TO 6'-0" WIDE - 2-#6 FOR OPENINGS UP TO 8'-0" WIDE 2-#7 UP TO 16'-0" WIDE, UNO
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