Structural · S-BMWFN

Standard Hook and Tie Details

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Standard reinforcement details show typical bend geometries, lap lengths, and hook configurations for concrete beams, columns, and girders. Ninety-degree, one-hundred-thirty-five-degree seismic, and one-hundred-eighty-degree hooks are detailed with specific bend diameters corresponding to bar sizes ranging from number three through number eighteen. Tie laps at frame columns and girders specify lap lengths of one foot eight inches for number four bars, two feet two inches for number five bars, and two feet seven inches for number six bars. Principal reinforcing offset bends and tie or stirrup extensions are dimensioned with standard extensions and minimum clearances. General notes specify that all bar bends must be made cold, and number fourteen and number eighteen bars require bend-testing and approval prior to bending.

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