A standard 135 degree seismic stirrup and tie hook configuration for reinforced concrete members features a bent hook with bar diameter d, bend diameter D, and a tail extension length of 6d or three inches minimum. Dimension A indicates the vertical detailing dimension from the start of the bend. Dimension H defines the horizontal projection of the hook extension.
135° SEISMIC STIRRUP/TIE HOOK 'D' 'H' '6d', 3" MIN. DETAILING DIMENSION 'A' 135° 'd'
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