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United States
ASDLRFD

Wall Analysis (LRFD)

US structural engineers using the LRFD edition to analyse gravity and lateral load paths in walls. Enter unfactored dead, live, wind, and seismic loads and the calculator generates all governing ASCE 7 LRFD strength combinations. Support reactions link downstream to connected column and footing calculations so the load path stays consistent.

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What it calculates

Enter unfactored loads and the calculator generates all governing LRFD strength combinations per IBC/ASCE 7, then produces governing factored axial, shear, and moment demands for the wall. Wall base reactions link to connected column and footing calculations so the load path updates automatically.

Code standards

  • ASCE 7-10 & 7-16
  • IBC 2009-2018
  • IRC 2009-2018

How it calculates

The Wall Analysis (LRFD) calculator accepts unlimited unfactored loads applied to a wall element, generates all ASCE 7 LRFD strength combinations automatically, and returns the governing factored demands at the critical section.

Load input and combination generation

Loads are entered by type - dead (D), live floor (L), roof live (Lr), snow (S), wind downward (W,dn), wind uplift (W,up), seismic vertical (Ev), and seismic horizontal (Eh). The wall self-weight is entered separately and is included as a dead load in all combinations.

The calculator applies LRFD strength-level factors from ASCE 7 Section 2.3 to generate the governing set of combinations, including:

  • 1.4D
  • 1.2D + 1.6L + 0.5(Lr or S or R)
  • 1.2D + 1.6(Lr or S or R) + (f1·L or 0.5W)
  • 1.2D + 1.0W + f1·L + 0.5(Lr or S or R)
  • 0.9D + 1.0W
  • 1.2D + 1.0Ev + 1.0Eh + f1·L + 0.2S and 0.9D - 1.0Ev + 1.0Eh

The companion factor f1 on live load is 0.5 for most occupancies (1.0 for storage and assembly). The uplift combination is checked separately where wind or seismic loads can reduce net axial demand.

Axial demand (Pu)

Factored axial loads are accumulated from the top of the wall downward. Each load type (dead, live, wind tributary, snow) is multiplied by the applicable combination factor and summed to give the factored axial demand at the base:

Pu = 1.2·D + 1.6·L + ...

The governing Pu is the maximum across all LRFD combinations, reported with the controlling combination label.

Shear and moment demand (Vu, Mu)

Lateral loads - wind pressure on the wall face, seismic horizontal demands, or linked reactions from upstream analysis - are resolved into a shear diagram and a moment diagram along the wall height. The calculator evaluates every LRFD combination and envelopes to find:

  • Vu - max factored shear at the critical section (typically the base)
  • Mu+ and Mu- - max factored positive and negative moments

For walls with openings, each pier carries its tributary lateral demand and tributary gravity load, with the governing pier controlling the design output.

Serviceability demands

Service-level combinations track deflection and stability demands separately from the strength envelope. Lateral drift under unfactored wind or seismic is calculated as a serviceability check and reported as a span ratio (h/delta) for comparison against code drift limits.

Load path linking

Wall base reactions - factored axial (Pu) and shear (Vu) from the governing LRFD combination - link directly into connected column, footing, or shear wall calculations in the same project. Changes to any upstream beam reaction or load propagate through the wall and downstream automatically, keeping the full load path consistent without manual re-entry.

Related calculators

Wall Analysis (ASD)→Beam Analysis with Load Combinations (LRFD)→Beam Analysis with Load Combinations (ASD)→Beam Analysis with Load Cases→

Frequently asked questions

What load combinations does this calculator use?
All LRFD strength combinations from ASCE 7-10 and 7-16, Section 2.3. The standard set covers 1.4D, 1.2D + 1.6L + 0.5Lr, 1.2D + 1.6S + f1·L, wind combinations at 1.2D + 1.0W + f1·L + 0.5Lr, the uplift case 0.9D + 1.0W, and seismic combinations. The calculator applies all combination factors automatically from the load types you enter.
What are the key inputs?
Wall height, self-weight, and an unlimited number of distributed or point loads applied at the top of the wall or along its height. Loads are entered as unfactored values by type - dead (D), live (L), roof live (Lr), snow (S), wind (W), and seismic (Ev, Eh). Support conditions at the base and top are also specified.
What results does the calculator output?
Governing factored axial demand (Pu), governing factored shear (Vu), and governing factored moment (Mu) at critical sections - each reported alongside the controlling ASCE 7 load combination. Serviceability demands are tracked separately for use in deflection or out-of-plane stability checks.
What is the difference between this calculator and the ASD version?
The LRFD version applies strength-level factors (1.2D, 1.6L, 1.0W, etc.) from ASCE 7 Section 2.3 to produce ultimate factored demands Pu, Mu, and Vu for use with strength-design capacity checks. The ASD version applies allowable stress factors from Section 2.4 and produces combined service-level demands. Use LRFD when your wall or column design calculator uses strength design.
Which IBC and ASCE 7 editions does the calculator cover?
The calculator covers IBC 2009 through 2018 and IRC 2009 through 2018, aligned with ASCE 7-10 and ASCE 7-16 load combination requirements. For projects under IBC 2021 or ASCE 7-22, verify load factors with your jurisdiction before applying results.
Does this calculator support load linking with upstream beam or analysis calculations?
Yes - loads can link directly from connected beam or analysis calculations in the same project. When a beam reaction or tributary load changes upstream, the wall calculator updates automatically so the factored demands at the wall level stay current without manual re-entry.

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