Concrete Pier Size Calculator. For sizing pier diameters for small foundations, the rule of thumb is “1 inch per foot of span.” thus, a deck that spans 8 ft. Adjust for half the span in both.
This calculator will analysis the rigid rectangular spread footings with up to 8 total piers, and for either uniaxial or biaxial resultant eccentricities. Your beams will need to bear the load of not only your decking materials, but additional components of the frame itself. Here’s what the math looks like for a 10’ by 10’ concrete patio:
To use the concrete volume calculator, simply enter the width, length, and thickness of your pour. For sizing pier diameters for small foundations, the rule of thumb is “1 inch per foot of span.” thus, a deck that spans 8 ft. Once you have the load on each footing, you divide the psi of the soil into that load to calculate the square inches of footing needed.
Please enter the dimensions of the post(s) you are using. Adjust side door width or post spacing to reduce load. Calculate the posts on either side of your side door need:
Adjust for half the span in both. Footing larger than 24” is required on either side of side door. Overturning sliding, and uplift stability checks.
The calculator will automatically estimate the number of cubic yards of concrete that will be. Select the sonotube size you want to use. Qt = (a1 + a2 + a3)cnc.
When building your deck, you’ll need several bags of concrete to create the footings, walls, and piers to support your deck. Concrete for post holes concrete for post holes. Nevertheless, here are the steps on how to use this tool:
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