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Concrete Member Deflection Analysis

Detailed deflection check per ACI 318-19 §24.2 — Branson & Bischoff effective Ie, cracked section analysis, long-term creep/shrinkage, and all Table 24.2.2 limit checks

ACI 318-19 §24.2Branson & BischoffLong-Term CreepTable 24.2.2 Limits

Calculation results are decision-support tools. The design engineer must review and verify all results independently.

Member & Support

Member Type

Support Condition

Span L (m)

Section Geometry

Width b (mm)

Total Depth h (mm)

Eff. Depth d (mm)

Reinforcement

Tension Steel As (mm²)

Compression Steel A's (mm²)

Materials

Concrete Grade

Steel Grade

Lambda (λ)

1.0 = normal weight, 0.75 = lightweight

Service Loads (unfactored, kN/m)

Enter service (unfactored) loads in kN/m. Include self-weight in dead load.

Dead Load (kN/m)

Sustained Live (kN/m)

Transient Live (kN/m)

Time-Dependent Factors

Loading Age (months)

Age of concrete when load is first applied

Load Duration (months)

3 mo → ξ=1.0, 6 → 1.2, 12 → 1.4, 60+ → 2.0

Analysis Options

Deflection Limit Case

Ie Calculation Method

Ready to Analyze

Fill in the section, loading, and time parameters then click Calculate