A rectangular reinforced concrete column cross-section measures up to 18 inches by 18 inches in size. Longitudinal reinforcement bars are positioned at the corners and along the perimeter inside a closed tie. Seismic crossties span across the interior with 135-degree hooks, requiring a minimum extension of six bar diameters or three inches.
SEISMIC CROSSTIES 135° 6db 3" MIN. "DEPTH" "WIDTH" CLOSED TIE LONGITUDINAL REINFORCEMENT TYPE 2 - UP TO 18"x18"
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