CIVIL ENGINEERING FORMULAS

TABLE 5.3 Allowable Bond Stresses*

Horizontal bars with more

than 12 in (30.5 mm) of concrete

cast below the bar† Other bars†

Tension bars with sizes and or 350, whichever is less or 500, whichever is less

deformations conforming to

ASTM A305

Tension bars with sizes and

deformations conforming to

ASTM A408

Deformed compression bars or 400, whichever is less or 400, whichever is less

Plain bars or 160, whichever is less or 160, whichever is less

* lb/in^2 (0.006895MPa).

†fccompressive strength of concrete, lb/in (^2) (MPa);Dnominal diameter of bar, in (mm).
1.7 2 fc 2.4 2 fc
6.5 2 fc 6.5 2 fc
2.1 2 fc 32 fc
4.8 2 fc
D
3.4 2 fc
D
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