Column Shear — ACI 318-25 Transverse Reinforcement Design

1 · Input data

Transverse reinforcement (tie, hoop and crosstie) design check of one rectangular, nonprestressed column in one-way shear to ACI CODE-318-25 (procedure ENG-2026-10-030): the section, the materials, the factored shear with its concurrent axial force, the frame type and the seismic quantities that 18.7.6.2.1 tests, the longitudinal bars, and one trial tie pattern. The page selects the row of Table 22.5.5.1, applies the new 22.5.5.1.1 cap and floor, tests the 18.7.6.2.1 hinge region, then checks the required V_s, the section-size limit, the tie spacing and size, and the 6 in. lateral-support rule. Every parameter below is required. Press Solve the column shear check when the card is complete — if anything is missing or malformed the page opens a pop-up naming each parameter and computes nothing; an input that is well-formed but outside the procedure is refused with the clause that refuses it. Not covered here: shear in a circular or spiral column, beam-column joint shear, biaxial shear interaction, and torsion (22.7) — and the Chapter 18 confinement amount and spacing limits are pointed to rather than computed. A licensed engineer verifies the design.

Section and materials

b — column width perpendicular to the shear (in)

h — overall column depth in the shear direction (in)

f′_c — specified compressive strength of concrete (psi)

f_y — yield strength of the longitudinal bars (psi)

f_yt — yield strength of the transverse bars (psi)

Factored shear and its concurrent axial force

V_u — factored shear at the section (kip)

N_u — factored axial force (kip, compression positive)

Frame type and the 18.7.6.2.1 quantities

Frame type (18.7.1.1)

ℓ_u — clear height of the column (in)

V_e — earthquake-induced shear per 18.7.6.1 (kip, 0 if not seismic)

Maximum required shear within ℓ_o (kip)

P_u including earthquake effects (kip, compression positive)

Longitudinal reinforcement

Longitudinal bar size

Number of longitudinal bars (4 or more, 10.7.3.1)

Longitudinal bars along the tied face (2 or more)

Transverse reinforcement (one trial pattern)

Tie / hoop bar size (No. 3 or No. 4, 25.7.2.2)

Legs crossing the potential shear crack (2 or more, 22.5.8.5.5)

Trial tie spacing s, on center (in)

Concrete and aggregate

Concrete exposure (Table 20.5.1.3.1, the column row)

d_agg — nominal maximum aggregate size (in)

λ — concrete type (19.2.4)

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2 · Solution

No solution yet — complete every input in the card above and press Solve the column shear check. This card stays empty until a solution is computed, and it is emptied again the moment any input changes, so a displayed solution always belongs to the inputs on screen.