Spreadsheets
Isolated Column Footing Design Excel Workbook – ACI 318-25 & ASCE 7-22
19 $
What's Included
Isolated rectangular or square column spread footing Excel workbook prepared to ACI 318-25 and ASCE 7-22 in US customary or SI metric units. Evaluates biaxial soil bearing pressure, flexure, one-way beam shear, two-way punching shear, column bearing, dowels, and bar development length.
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Product Description
Product Overview
This Excel workbook designs concentric or eccentrically loaded isolated column spread footings in accordance with ACI 318-25 and ASCE/SEI 7-22. It checks allowable soil bearing pressure under service load combinations (ASD) and sizes concrete thickness, flexural reinforcement, dowels, and anchorage under strength load combinations (LRFD) in either US Customary or SI Metric units.
Standard: ACI 318-25 / ASCE 7-22
Units: US & SI Units
File: 01-Column Footing Design Based on ACI 318-25.xlsx
Units: US & SI Units
File: 01-Column Footing Design Based on ACI 318-25.xlsx
Design Checks & Calculation Scope
Biaxial Soil Bearing & Stability
Computes gross/net bearing pressures at footing corners (qmax, qmin) under axial load and biaxial moments (Mx, Mz) for dead, live, roof live/snow, wind (1.0W / 0.6W), and seismic (1.0E / 0.7E) combinations.
Two-Way Punching & One-Way Shear
Checks critical punching shear perimeter bo at d/2 from column faces and one-way beam shear at distance d using φ = 0.75 (ACI 318-25 Table 21.2.1(b)) and shallow foundation size-effect factor λs = 1.0 (Sec. 13.2.6.2).
Flexure & Shrinkage Reinforcement
Sizes longitudinal and transverse bottom flexural bars (φ = 0.90) with ACI 318-25 Table 24.4.3.2 minimum shrinkage/temperature steel ratio including the 0.0014 floor for high-strength reinforcement.
Column Bearing & Dowel Transfer
Evaluates concrete bearing stress (φ = 0.65, Table 21.2.1(c)) including the footing confinement factor √(A2/A1) ≤ 2.0, required interface dowel area, and straight or 90-degree hooked development length with grade factor ψg (Sec. 25.4.2.5).
Technical Summary
| Governing Standards | ACI 318-25 (Ch. 13, 16, 21, 22, 24, 25) & ASCE 7-22 Ch. 2 |
| Unit System | Switchable: US Customary (kips, ft, in, ksi) or SI Metric (kN, m, mm, MPa) |
| Worksheet Tabs | FOOTING (Input & Report), Sheet1 (Detailed Equations), Design Basis |
| Key Inputs | Column/pedestal dimensions, f’c, fy, footing L/B/h, soil weight, allowable bearing qall, service & factored loads, rebar size |
| Key Outputs | Allowable vs actual soil pressure, punching & one-way shear ratios, As required/provided, dowel size, development length ld / ldh |
Worksheet Screenshots
Sample calculation output captured directly from the Excel printable sheets:
Building Code Standards & Regional Applicability
Strength reduction factors (φ), capacity equations, and reinforcement detailing limits follow ACI 318-25 / ACI 318M-25 and ASCE/SEI 7-22. Engineers working under national codes derived directly from ACI 318 can adjust concrete strength, steel yield grade, load factors, and bar sizes directly in the input cells:
| Region / Country | Applicable National Standard | Engineering Application |
|---|---|---|
| United States & Territories | IBC 2024 / ACI 318-25 / ASCE 7-22 | Matches current IBC / ACI 318-25 building code provisions in US customary units (kips, in, ksi). |
| Saudi Arabia & GCC | SBC 304 (Saudi Building Code) | SBC 304 adopts ACI 318 strength reduction factors (φ) and detailing provisions directly for EPC and commercial submittals. |
| Philippines | NSCP 2015 (ACI 318 based) | Uses equivalent strength design, shear-friction, and seismic detailing provisions; metric or customary bar inputs supported. |
| Indonesia | SNI 2847:2019 / SNI 1726:2019 | SNI 2847 adopts ACI 318 provisions with compatible flexural, shear, deep-beam, and special wall checks. |
| Colombia & Latin America | NSR-10 / NEC-15 / NTC-C | Follows the ACI 318 framework for seismic confinement, coupling beams, shear walls, and spread foundations. |
| Canada & International | CSA A23.3 / International Projects | Useful as an ACI 318-25 design check on international industrial, oil & gas, and plant foundations. |
Spreadsheet Notes & Engineer Responsibility
- Editable Open Formulas: All worksheets use native Excel formulas without VBA macros or password-locked sheets.
- Worked Example Included: Pre-populated sample inputs and pass/fail checks allow you to review the calculation flow immediately before entering project loads.
- Professional Responsibility: This spreadsheet is an engineering design aid. Input loads, geotechnical parameters, site seismic criteria, reinforcement detailing, and final code compliance remain the responsibility of the Engineer of Record.
Included File
- Workbook:
01-Column Footing Design Based on ACI 318-25.xlsx(calculation sheet(s) + Design Basis reference tab). - Delivery: Instant download link (Google Drive) provided after checkout.
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