Structural · S-HCZGH

Reinforcement Hook and Splice Development Length Details

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Standard and confined rebar hook configurations detail the minimum embedment lengths and cover requirements for structural concrete reinforcement. The 90-degree hook requires a minimum extension of twelve bar diameters, two inches of end cover, and two-and-a-half inches of side cover, with inside bend diameters varying from six bar diameters for number eight and smaller bars, up to ten bar diameters for number fourteen and eighteen bars. The 180-degree U-hook requires a minimum extension of four bar diameters or two-and-a-half inches, whichever is greater. Non-contact splices require a typical lap splice length, a minimum side cover, and a spacing between spliced bars ranging from one-half inch to six inches maximum, with staggered overlaps.

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