Standard reinforcing bar hook configurations illustrate standard bend angles and extension lengths for concrete reinforcement detailing. Each hook diagram indicates the bar diameter and the extension length beyond the bend.
90 DEGREE HOOK 180° 2" 1 /2" 1 /2" 1 /2" 6 1/4" 135° 90° d b d b d b l ext l ext l ext 3 " 135 DEGREE HOOK 180 DEGREE HOOK 90 DEGREE HOOK 180° 2" 1/2" 1/2" 1/2" 6 1/4" 135° 90° d b d b d b l ext l ext l ext 3" 135 DEGREE HOOK 180 DEGREE HOOK
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