SkyCiv Documentation

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SkyCiv Foundation

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  3. Combined Foundation
  4. Introduction


A Combined footing is a long footing supporting two or more columns in one row.  Combined footing is commonly used as an alternative [1] when columns are spaced too closely that if isolated footing is provided the soil beneath may have a part of the common influence zone and [2] bearing capacity of soil is such that isolated footing design will require extension of the column foundation to go beyond the property line.


Figure 1. Combined Footing Interface


SkyCiv Foundation (combined) has the following features:

  • Finite Element Analysis (FEA)
  • Powerful soil pressure analysis based from FEA
  • Wood armer analysis for a detailed flexure check
  • Summary table of design check values and ratios
  • Detailed, step-by-step calculation report (PDF or HTML download).
  • Intuitive user-interface.
  • Provides dynamic graphical representation of the model and results
  • Extensive documentation, solved examples, and blog posts to guide you throughout the software.

Supports the following:

  • Fully code compliance with American code (ACI 318-14), Australian standard (AS 3600-2018), European (Eurocode), & Canadian standard (CSA 2014).
  • Can solve Multiple foundations
  • Column offsets in any directions
  • User loads in any directions
  • Computes Overturning Moment and Sliding Factor of safety
  • Can solve multiple load cases such as Dead, Live, Earthquake, Wind and etc.
  • Customization loads, materials, reinforcement, and design criteria.Want to try SkyCiv’s Foundation Design software? Our free tool allows users to perform concrete footing calculations without any download or installation!


    Jerome Carlo San Juan Product Developer
    Jerome Carlo San Juan
    Product Developer
    BSc (Civil), MSc (Civil)
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