Standard hook configurations for reinforcing bars other than stirrups and ties detailing dimensional requirements based on bar diameters. The 90-degree and 180-degree hooks incorporate specified extension lengths including 12db, 4db, and a minimum of 2 1/2 inches. Bend radius and extension requirements scale with bar sizes ranging from number 3 through number 18 bars.
#9 THRU #11 #3 THRU #8 db 6db #3 - #8 8db #9 - #11 10db #14 & #18 2 1/2" MIN 4db 12db 3db 4db
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