Deck surface area = 20FT x 28FT
Deck fully supportd by six piers - 12" concrete piers
Actual lateral(unfactored) load per pier is 500lbs
Pier design depth is 6FT.
This is a new deck pier with footing (being built in May). I've designed it to be buried 6FT, and resisting the small moment from the deck lateral loads. But I now realize that I could hit bedrock (I see bedrock in my backyard). If for some reason I hit bedrock early I need a plan of action...
Thanks oldestguy. I will be increasing my footing so the actual weight of the footing concrete plus the weight of the fill above is FULLY countering the moment. I would like to rely minimally on the rock anchors. Reasons being that I don't want to do geotechnical, and I don't know the...
I have a concrete pier with a footing sitting on bedrock below ground level. There is a moment applied on the pier that I want to resist by increasing the footing size. I wish to resist this moment with the weight of the fill applied to the footing. Can I just use the weight of the fill...
I worked out the minimum depth using the above formula and I got a surprisingly short depth (compared to my actual 6FT depth.
I assume the value b is the diameter of my post (12")? with a soil pressure of 13psi (clay, worse case), Va=1000lbs, and Ma=60,000 lb-in, my minimum depth is only about...
Thanks WARose. I realized my error and tried to edit the post in time.
If I take the moment to the footing it more than doubles my lever. If somewhat accurate I'll do that but I feel like it would be too conservative.
Hello. I have a 10" diameter concrete Column buried 6 FT (anchored to footing at bottom). The pier protrudes 5FT above ground. Assuming I have a simple horizontal load at the top of the column, is there a method or rule of thumb to estimate the location of the maximum moment? Or, is the...
