Singly-Reinforced Beam — ACI 318-25 Flexural Design

1 · Input data

Flexural design check of a rectangular, nonprestressed, singly-reinforced beam to ACI CODE-318-25 (procedure ENG-2026-10-024): the section, the materials, the factored moment, the exposure, the trial bar arrangement and the development-length conditions. Every parameter below is required. Press Solve the beam flexure 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.

Section and materials

b — width of the rectangular section (in)

h — overall depth of the section (in)

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

f_y — specified yield strength of reinforcement (psi)

Demand, span and exposure

M_u — factored moment at the section (kip-ft)

P_u — factored axial compression (kip, 0 if none)

ℓ — span of the beam (ft)

Support condition (Table 9.3.1.1)

Concrete exposure (Table 20.5.1.3.1)

Reinforcement

Stirrup / tie bar size (25.7.2.2)

Longitudinal bar size

Number of longitudinal bars (2 or more)

Horizontal layers of tension bars

d_agg — nominal maximum aggregate size (in)

Development-length conditions (Table 25.4.2.5)

λ — concrete type

ψ_e — reinforcement coating

ψ_t — casting position

Transverse reinforcement through ℓ_d (Table 25.4.2.3)

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2 · Solution

No solution yet — complete every input in the card above and press Solve the beam flexure 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.