Reinforcement detailing of Joints is applied automatically in accordance with Codes.
For earthquake resistance structures reinforcement detailing of Joints is applied automatically in accordance with Codes.
International Design Codes
ACI 318-19 : Reinforcement Detailing of Joints
Notation in ACI 318-19
db = nominal diameter of bar, wire, or prestressing strand, in
fc' = specified compressive strength of concrete, psi
√fc‘ = square root of specified compressive strength of concrete, psi
fy = specified yield strength of nonprestressed reinforcement, psi
ld = development length in tension of deformed bar, deformed wire, plain and deformed welded wire reinforcement, or pretensioned strand, in.
ldc = development length in compression of deformed bars and deformed wire, in.
ldh = development length in tension of deformed bar or deformed wire with a standard hook, measured from outside end of hook, point of tangency, toward critical section, in.
ldm = the required development length if bar is not entirely embedded in confined concrete, in.
s = center-to-center spacing of items, such as longitudinal reinforcement, transverse reinforcement, tendons, or anchors, in.
λ = modification factor to reflect the reduced mechanical properties of lightweight concrete relative to normalweight concrete of the same compressive strength