• Minimum diameter of tie bar is controlled automatically according to Codes.

  • Minimum and maximum clear spacing of ties are controlled according to Codes.

  • Minimum spacing of spirals are controlled according to Codes.

  • Minimum diameter of spiral is controlled automatically according to Codes.

  • The volumetric spiral reinforcement ratio ρs is controlled according to Codes.

İnternational Design Codes

ACI 318-19 : Transverse Reinforcement

TSC 2018 : Column Transverse Reinforcement Detailing and Limits Transverse Reinforcement Detailing for Beams.

Symbols

dagg = Nominal maximum size of coarse aggregate, in.
db = nominal diameter of bar, wire, or prestressing strand, in
Ach = cross-sectional area of a member measured to the outside edges of transverse reinforcement, in.2
f'c = specified comprehensive strength of concrete, psi
fyt = specified yield strength of transverse reinforcement, psi
Ag = gross area of concrete section, in.2 For a hollow section, Ag is the area of the concrete only and does not include the area of the void(s)
ρs = ratio of volume of spiral reinforcement to total of core confined by the sprial, measured out-to-out of spirals