Standard 90-degree and 135-degree hooks for reinforcing bar stirrups and ties include bending dimensions, minimum extension lengths, and inside bend diameters. A companion schedule provides specific dimensions D, A, G, and approximate extension H for bar sizes ranging from number 3 through number 6. General notes specify bending limitations for column ties and welded wire fabric. The diagrams define detailing dimensions relative to bar size d for accurate field fabrication.
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