Column Reinforcement Detailing.

İnternational Design Codes

ACI 318-19 : Column Reinforcement Detailing per ACI 318-19 with ideCAD

TSC 2018 : Longitudinal Reinforcement Detailing for Columns Transverse Reinforcement Detailing for Columns

Notation in ACI 318-19

d_agg = Nominal maximum size of coarse aggregate, in.
d_b = Nominal diameter of bar, wire, or prestressing strand
f_y = specified yield strength of nonprestressed reinforcement, psi
K_tr = transverse reinforcement index, in.
l_d = development length in tension of deformed bar, deformed wire, plain and deformed welded wire reinforcement, or pretensioned strand, in.
s = center-to-center spacing of items, such as longitudinal reinforcement, transverse reinforcement, tendons, or anchors, in.
ψ_e = factor used to modify development length based on reinforcement coating
ψ_g = factor used to modify development length based on grade of reinforcement
ψ_s = factor used to modify development length based on reinforcement size
ψ_t = factor used to modify development length for casting location in tension
λ = modification factor to reflect the reduced mechanical properties of lightweight concrete relative to normalweight concrete of the same compressive strength