Foundation Design Software: Spread, Combined, and Strap Footings

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Structural Design Software

Complete Your Footing Design Quickly and Confidently



ASDIP FOUNDATION is a structural engineering software utilized by engineers for the design of pile caps and concrete footings such as spread footings, strap footings, combined footings, and wall footings as per the latest ACI 318 and CSA A23.3 provisions.

This foundation design software substantially simplifies time-consuming calculations for structural engineering design. Load combinations per either ASCE 7 or user-defined.

ASDIP FOUNDATION 4 has been released, including great new features such as Custom Combinations, Sorted Results, new modules for Wall Footing and Pile Cap design, direct integration with ETABS, import from other software via Excel, and more...


  • Quickly model your concrete footings with the simple and efficient graphical user interface.
  • Confidently optimize your design and comply with design Code provisions.
  • Impress clients and plan-checkers with professional condensed or detailed reports.
  • Extensive documentation, solved examples, and blog posts to guide you throughout the software
  • Create, organize, manage, and store your electronic calculations safely.

Design Codes:

  • ACI 318-19 and 11/14 (🇺🇸)
  • ASCE 7-05 or 10/16 (🇺🇸)
  • CSA A23.3-19 (🇨🇦)

Key Features: 

  • Spread Footings
  • Strap Footings
  • Combined Footings
  • Wall Footings
  • Pile Caps
  • Customizable design criteria, options, and conditions.
  • Dead, Live, Roof live, Snow, Wind and Seismic load cases.
  • Complete stability analysis for overturning, sliding, uplift, and bearing.
  • Graphic display of bearing pressures, one-way shears, punching shears, and moments.
  • Design Manager for preliminary design of the footing based on the loading conditions and your preferred bar sizes.


  • Import Loads via Excel
  • Footing Schedule Export to Excel
  • Coming Soon: ASDIP for CAD and Revit



R2P Construction Services

It’s the best engineering software, especially ASDIP FOUNDATION. I’ve tried other software but ASDIP overcomes all of them. The detailed calculation on the output, the user-friendly GUI, ASDIP is the best."



Strap Footing Design Module Features:

A strap footing is one that usually supports two columns, and therefore is a special type of combined footing. If a property line exists at or near the edge of an exterior column, an isolated footing would be placed eccentrically under this column and it would tend to tilt. Overturning of the exterior footing is prevented by connecting it with the adjacent interior footing by a strap beam. 

The use of a strap footing may be justifiable under conditions where the distance between columns is large and a large excavation area must be avoided. It is common practice that the bottom surfaces of the exterior footing, the strap beam, and the interior footing be at the same elevation, but the thickness of each element may be different, depending on the strength requirements.

This foundation design software computes the soil bearing pressures induced by a strap footing under the action of vertical loads and bending moments, per the latest ACI design criteria. It designs the reinforcing steel for the interior and exterior footings, and checks the one-way and two-way shear stresses. In addition, the program generates the shear force and bending moment diagrams in order to design the reinforcement for the strap beam. The concrete footings design is based on the Ultimate Strength Design Method of the ACI 318. Load combinations per the ASCE 7. Both columns may be eccentric in the longitudinal direction.


The input options are conveniently organized in tabbed pages. The required input data includes the footings, strap and columns dimensions, the material properties, the allowable soil bearing pressure, and the acting service and factored loads. In addition, the program accepts a number of load cases, such as dead, live, snow, wind and seismic, to be combined internally. Alternatively, you can model a set of pre-combined loads.



This module checks the overall footing stability under the service combined loads and performs the concrete design of the two footings and the strap beam, which includes the one-way shear, punching shear and bending moments under the factored combined loads. In each case the controlling load combination is identified and reported.

For a quick overview of the design results click the “At a Glance” tab. A more detailed step-by-step calculations are available at the “Detailed” tab, which is updated with every new change. In addition, ASDIP FOUNDATION uses a pre-formated colorful text-with-values output for easier identification of the problem areas. Use the Print Preview command to see a preview of the pre-formatted report on-screen, which includes the color graphics generated by the software.

ASDIP FOUNDATION generates a graphical view of the footing design and the resulting pressures and forces. The program also generates the moment and the shear diagrams for the controlling load combination for granular checking, as well as a view of the construction section and elevation with the reinforcement information.




  • Any Windows® Operating System. No additional software required.
  • Full compliance with:
    • ACI 318-19 and 11/14
    • ASCE 7-05 or 10/16
    • CSA A23.3-19
  • Versatility to model a full set of load combinations, or just a single pre-combined load.
  • Specify water table location for buoyancy check.
  • Customizable design criteria, options, and conditions.
  • Three different unit systems available:
    • US (in, ft, Kip, ksi)
    • SI (cm, m, N, MPa)
    • MKS (cm, m, Tn, Kg/cm2)
  • Rich user interface to model the geometry, materials, loads and rebars.
  • Multiple load cases such as dead, live, roof live, snow, wind and seismic.
  • Column may be eccentric on footing in both directions.
  • Column can be modeled as a short pedestal supporting a steel column.
  • New clean and uncluttered layout design.
  • Multiple visual controls to model the reinforcing steel.
  • Combined footings can be either rectangular or trapezoidal.
  • Specify proportion of passive and friction acting together for sliding resistance.
  • Change any parameter and see the effect immediately for what-if analysis.
  • Buoyancy effects due to the presence of water table.
  • Custom load combinations.

         Calculation results:

  • Complete footing design and footing-column interface.
  • Complete stability analysis for overturning, sliding, uplift, and bearing.
  • Graphic display of bearing pressures, one-way shears, punching shears, and moments.
  • Plain concrete strength considered.
  • Column / pedestal structural design included.
  • Percentage of passive / friction acting together.
  • Software finds the controlling combination for each condition to optimize design.
  • Exact mathematical solution of bearing pressures, shears and moments under biaxial loading.
  • Detailed step-by-step reports with exposed formulas and Code references.
  • Combined text-with-values output message updated with each change.
  • Outstanding output with Print Preview.
  • Three ways to show the calculations: At-a-Glance, Condensed, and Detailed.
  • Construction sketch of your footing updated with each change.


  • Project Manager handles calculations and files for you.
  • You are in complete control of every single aspect of the design.
  • Design your concrete footings in minutes (not hours).
  • Verify every design step quickly. Not a “black box”.
  • No silly assumptions or math shortcuts. Confident, accurate, and reliable results.
  • Focus your attention on engineering, and let ASDIP FOUNDATION handle all the mathematical complexity.
  • Multiple calculations stored in a single project file.
  • Safely create, organize, manage, and store your electronic calculations.

Quick, easy and thorough! This software is the most user-friendly engineering suite I’ve ever used. The input modules are very intuitive and easy to follow. The comprehensive output with code references make verifying the output a snap."

Richard B. Ewer, PE

Celerity Engineering, Inc.

League City, Texas