SPLICES DEVELOPMENT amp STANDARD HOOKS FOR CONCRETE
A Based on Grade 60 reinforcing bars as follows D i must equal or exceed 6d b for bar sizes No 3 through 8 M 10–M 25 8d b for No 9–11 M 29–M 36 bars Diameters of bend may be decreased to 5d b for stirrups and for Grade 40 No 3–7 M 10–M 22 B For 180 176 standard hooks bar extensions may not be less than 2 189 in 64 mm