Structural · S-WCMH8

Hooks for Ties, Stirrups and Hoops

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Standard and seismic hook geometries are defined for reinforcing bars used as ties, stirrups, and hoops. For bars number five and smaller, standard hooks require six bar diameters while seismic hooks require six bar diameters with a three-inch minimum. For bars number six through number eight, standard and seismic hooks require twelve bar diameters. Extension lengths for one hundred thirty-five degree bends require four bar diameters for number five and smaller bars, and six bar diameters for number six through number eight bars. Where cross ties engage the same longitudinal bar, consecutive cross ties alternate ninety-degree hooks end for end along the longitudinal bar.

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