- Dead and Live Loads
Free Dead and Live Load Calculator — ASCE 7-22 Table 4.3-1 and Table C3.1-1a
Build dead and live loads per ASCE 7-22. Assemble dead loads from material and assembly weights (Table C3.1-1a) for roofs, floors, walls, and ceilings; assign live loads by occupancy (Table 4.3-1), including the roof live load Lr, at the tabulated values — a reduced live load is entered if one is taken — and summarize them as the project's gravity loads.
- Dead loads built assembly by assembly from ASCE 7-22 Table C3.1-1a.
- Light, Typical and Heavy presets, plus your own lines such as rooftop PV.
- Live loads by occupancy from Table 4.3-1, with the roof live load and handrail loads.
- Seismic Loads
Free Seismic Load and Base Shear Calculator — ASCE 7-22 Equivalent Lateral Force Procedure
Calculate seismic base shear and story forces per ASCE 7-22 Chapter 12 (Equivalent Lateral Force). Site class and spectral parameters, risk category and importance factor, seismic force-resisting system (R, Cd, Ω0), period, response coefficient Cs, base shear, the vertical distribution of story forces with story shears and overturning moments, and diaphragm design forces (Fpx).
- Site class, SDC and the full Table 12.2-1 picked from the code's own tables.
- Period by Table 12.8-2, by 0.1N, by the Cw method, or typed and capped at Cu·Ta.
- Base shear, story forces, overturning and diaphragm forces, with four diagrams.
- Wind Loads
Free Wind Load Calculator — ASCE 7-22 MWFRS by the Directional (Chapter 27) and Envelope (Chapter 28) Procedures
Calculate wind loads per ASCE 7-22. Exposure category, topographic, and velocity-pressure parameters, then design wind pressures on the Main Wind Force Resisting System by both the Directional (Chapter 27) and Envelope (Chapter 28) procedures, including the wind load cases.
- Directional (Chapter 27) and envelope (Chapter 28) procedures, every line substituted.
- Pressure and resultant-force diagrams in elevation, plan and sidewall views.
- The four Figure 27.3-8 load cases with torsion, roof uplift and the minimum loads.
- Wood & Steel Beam
Free Wood Beam Calculator — NDS 2024, with Steel Beams per AISC 360-22
Design wood beams per NDS 2024 — sawn lumber, glulam, I-joists (TJI, BCI, LPI), LVL, LSL, and PSL — or steel beams per AISC 360-22 (LRFD) with W-shapes, rectangular/square and round HSS, and pipe from the AISC Shapes Database. Build the load case from ASCE 7-22 load types (D, L, Lr, S, W, E, etc.) with uniform, point, and triangular/trapezoidal loads over single- or multi-support spans; checks moment, shear, deflection and bearing — with the NDS adjustment factors for wood and compactness/lateral-torsional buckling per AISC Chapter F for steel. Switch between the wood and steel design of the same beam to compare sizes on screen.
- Multi-span beams, cantilevers and sloped members; uniform, partial, trapezoidal and point loads.
- Sawn lumber, glulam, I-joists, LVL, LSL and PSL, or AISC W-shapes, HSS and pipe.
- Shear, moment and deflection diagrams for every load combination; Simpson hanger selection.
- Floor/Ceiling Joist & Rafter
Free Floor Joist, Ceiling Joist and Rafter Span Calculator — 2024 IBC Tables and Trus Joist TJI
Prescriptive span tables for floor joists, ceiling joists, and rafters per 2024 IBC Chapter 23 (Tables 2308.8 and 2308.11), plus Trus Joist® TJI® engineered I-joist spans. Allowable spans by species, grade, size, spacing, and loading, with the ceiling-height rafter adjustment and optional Simpson Strong-Tie hanger selection.
- 2024 IBC span tables digitized cell by cell for four species in four grades.
- Floor joists, ceiling joists and rafters at 12, 16, 19.2 and 24 in, pass or fail against the table span.
- Trus Joist TJI floor, roof and ceiling spans, plus Simpson hanger selection.
- Wood & Steel Column
Free Wood Column Calculator — NDS 2024, with Steel Columns per AISC 360-22
Design wood columns per NDS 2024 — sawn lumber, glulam, LVL, LSL, and PSL with the column-stability factor CP — or steel columns per AISC 360-22 (LRFD) with W-shapes, rectangular/square and round HSS, and pipe from the AISC Shapes Database, including flexural buckling (Ch. E) and slender-element sections (E7). Effective-length (Ke) factors for pinned, fixed, and sway end conditions per axis; ASD combinations for wood, LRFD for steel. Switch between the wood and steel design of the same column to compare sizes on screen.
- Effective length picked from the NDS Table G1 picture table, unbraced lengths per axis.
- Axial load plus a lateral wall load, combined bending and compression per NDS §3.9.2.
- Steel columns per AISC 360-22 Chapters E and H, slender elements included.
- Wood-Frame Shear Wall
Free Wood Shear Wall Design Calculator — SDPWS 2021 and NDS 2024
Design wood-frame shear walls per SDPWS 2021 and NDS 2024 for wind and seismic. Model the walls on a building plan and distribute the story shear to the wall lines by tributary area and length, unit shear capacity by wood species and sheathing (Table 4.3A), hold-down (tie-down) tension and end-post (compression chord) forces from overturning, Simpson Strong-Tie hold-down and SABR anchor-bolt selection, end-post design per NDS 2024 and collector (drag strut) forces, with ASCE 7-22 load combinations.
- Draw the walls on the building plan, including L-, T- and U-shaped footprints.
- Story shear distributed to each wall line automatically, seismic by area and wind by length.
- Simpson hold-downs and SABR anchors from the catalog; end posts and collectors designed.
- Isolated & Strip Footing
Free Concrete Footing Calculator — ACI 318-25 Spread (Isolated) and Strip Footings
Design isolated (column) and strip footings per ACI 318-25 with ASCE 7-22 load combinations. Soil bearing (kern-aware or biaxial with partial contact), overturning and sliding, flexural reinforcement with minimum steel, one-way and two-way (punching) shear, bearing at the support and development length.
- Isolated and strip footings on concrete, masonry, steel or wood supports, with a pedestal.
- Bearing per combination, kern-aware or biaxial with partial contact; overturning and sliding.
- One-way and punching shear, flexure, dowels and development length, with plan and section views.
- Cantilever Retaining Wall
Free Cantilever Retaining Wall Calculator — ACI 318-25 and IBC 2024
Design cantilever concrete retaining walls per ACI 318-25, IBC 2024 and ASCE 7-22. Overturning and sliding stability (IBC 1807.2.3), soil bearing, stem/heel/toe and shear-key strength design, and reinforcement development — with IBC Table 1610.1, ASCE Table 3.2-1 or a geotechnical equivalent fluid pressure, sloped backfill, seismic earth pressure (Mononobe-Okabe, Seed-Whitman or the report's own ΔPAE), groundwater, a footing behind the wall, wind on the stem and on a fence, a stepped stem, and a stem of solid-grouted concrete masonry (CMU) designed by TMS 402-22 allowable stress design on the same concrete footing.
- Concrete or solid-grouted CMU stem on the same concrete footing.
- Seismic earth pressure by Mononobe-Okabe, Seed-Whitman or the geotechnical report.
- Groundwater, surcharges, sloped backfill, wind on the stem, and a reinforcement detail drawn to scale.
Every calculator adds its pages to one calculation report, which opens with the Cover Sheet.
StructSuite is an independent product and is not affiliated with, sponsored by or endorsed by Simpson Strong-Tie Company Inc. or any other manufacturer named here. Simpson Strong-Tie®, DTT, HDUE, SABR, Trus Joist®, TJI®, BCI®, LPI, Microllam®, Parallam®, TimberStrand® and Versa-Lam® are trademarks of their respective owners, used only to identify supported products and design-value sources.