Calculating Load for Helical Piles
I’m building a deck (a 18’x31′ rectangle, with a 8’x12′ rectangle attached to it, in the shape of an L). It’s going to be between 22″ and 30″ above ground (there is a little slope). I think using helical piles would be environmentally better, not that more expensive, and indeed easier. Someone told me that calculating the load capacity for each pier would be easy; yet, I am having truly a hard time. All the calculators I find assume that I’ll be using concrete footings.
Does anyone have any tips?
Also, am I right in thinking that the helical piles company will install the piles for any load capacity I asked them to? (That’s what a representative for one of the installing companies seemed to say.) If so, how much do the calculations really matter? If, for instance, my calculations for the “tributary areas” give me results that are all lower than 2,000 Lb for each area, can’t just ask for each pile to have a 3,000 Lb load capacity?
Thanks for any input!
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