Some useful information on required depth of footings/foundations
- Concrete Cost Estimator
- Concrete Continuous Footing
- Landscape Bidding and Estimating
- Construction Cost Estimating
- Concrete and steel cost estimation
- Construction Cost Estimate Breakdown
- Construction Estimating Worksheet
- Home Construction Cost Estimate
- Estimate Pricing Sheet
- Sheet for General Contractor
- Construction Cost Estimate
- Labor Materials Cost Estimator
- Masonry Estimating Sheet
- Sheet for Building Contractor
- Construction Schedule Bar chart
- General Cost Estimator Sheet
- General Construction Estimate
- Building and Road Estimating Sheet
- Detailed expense estimates
- Door and Window Takeoff Sheet
- General Construction Cost Estimating Sheet
The footings should be provided underneath the top (organic) soil, miscellaneous fill, deserted foundation, debris or muck. If the top loose soil or fill is adequately intense, two alternatives should be applied based on the relative economy and accessible time:
(i) Extracting the top soil directly underneath the footing and displacing it with lean concrete.
(ii) Extracting the top soil in an area greater than the footing and displacing it with compacted sand and gravel fill. The area of the compacted sand and gravel fill should be adequately bigger to disperse the load of the footing load.
In both cases, it is required to attain the level of the strata that contains the necessary bearing strength allowed for the design of footing.
Sometimes, the top soil is good and compact, and may contain sufficient bearing strength. Under such circumstance, it will be effective to retain the minimum depth of foundation as per Rankines formula.
Note: From the formula, it is found that q denotes the actual load intensity and not the safe bearing strength of soil. Some times, the actual load intensity remains under the safe bearing strength of soil, necessitating minor minimum depth.
If the footings rest on very stiff soil with very high safe bearing strength, the minimum depth of foundation measured depending on the safe bearing strength would become very large.
Under such soils, the width of the footing (available from other considerations) would be in excess of the one required from the bearing strength considerations, as a result the actual soil pressure is reduced as compared to the safe bearing strength.
The depth of footing should also be maintained in such a manner that the rate or angle of spread of the load from the wall base to the exterior edge of the ground bearing does not go beyond the allowable value.
- Application of concrete calculator
- Roofing Calculator can streamline the roof estimating process
- House construction cost calculator
- Engineering column design excel spreadsheet
- Material Estimating Sheet with Excel
- Materials List and Cost Estimate Worksheet
- Concrete Slab Estimating Calculator Sheet
- Common types of foundations for buildings
- Online calculation of construction materials
- Estimating with Excel for the Small Contractor
- Concrete Beam Design Spreadsheet
- Virtual Construction Management app for construction
- Autodesk’s Project Skyscraper
- Reed Construction’s Reed Insight
- Manage your construction project documentation
- Costimator, the popular cost estimating software
- On Center Software for construction professionals
- Free Construction Estimating Software
- Plumbing Calc Pro
- Cost Estimate Worksheet
- HVAC Piping Quantity Takeoff Worksheet
- Construction Estimating Software Sheet
- Estimate Cost Templates
- Construction Punch List
- Construction cost estimating template consisting estimating basic
- Gantt Chart Template for Excel
- Download Civil Engineering Spreadsheets with Verification
- The Building Advisor Estimating and Budgeting Worksheet
- Spreadsheet for design of concrete bridge
- Construction Estimating Software Free