Reinforcing bar development length standard hook details show development length ldh measured from the face of support for both 180-degree and 90-degree hooks. Side cover greater than or equal to two and one-half inches and end cover greater than or equal to two inches are specified. Adjustment multipliers of 1.43 are applied for restricted side and end covers, 1.3 for lightweight aggregate concrete, and 1.2 for epoxy-coated bars.
REINFORCING BAR NOTES: 1. SIDE COVER >2 1/2 INCHES. 2. END COVER (90° ACI HOOKS) > 2 INCHES. 3. FOR SIDE COVER < 2 1/2 INCHES AND END COVER < 2 INCHES, MULTIPLY THE TABULATED VALUES BY 1.43. 4. FOR LIGHT WEIGHT AGGREGATE CONCRETE, MULTIPLY THE TABULATED VALUES BY 1.3. 5. FOR EPOXY-COATED BARS, MULTIPLY THE TABULATED VALUES BY 1.2 T=Asfy FACE OF SUPPORT FACE OF SUPPORT STANDARD HOOK 90° HOOK 180° HOOK T=Asfy D D "ldh" FOR STANDARD HOOK SIZES, SEE "STANDARD HOOK AND TIE DETAILS" "ldh" "ldh" STANDARD HOOK
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