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Concrete Construction Techniques
60 CHAPTER THREE
BEND DIAMETER
90-DEGREE HOOK
BAR EXTENSION
BEND DIAMETER
135-DEGREE HOOK
BAR EXTENSION
BEND DIAMETER
180-DEGREE HOOK
BAR EXTENSION
Bar Size Minimum Diameter of Bend
Nos. 3 through 8 6 bar diameter
Nos. 9 through 11 8 bar diameter
Nos. 14 and 18 10 bar diameter
Minimum diameter of bends for standard size steel reinforcing bars.
FIGURE 3-20
Examples of bent bar shapes, standard end hooks, and minimum diameter of bends
(from Waddell, Concrete Manual, International Conference of Building Officials, Whittier,
California).
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