Low Profile Deck Footings for Low Level Deck
by John Stuart
(Victoria, BC, Canada)
I am building a low profile deck, have couple of questions about footings to keep the deck low to the grade.
The deck is pressure treated 10'x20'. The substructure is 3 2x8 beams with joists mounted flush with top of beams to save height.
1st question - 3 sonotubes per beam for a total of 9 footings. I am wondering how I level all footings to the exact same height so the beam rests directly onto footings evenly.
2nd question- is it possible to build your substructure (beams and joists) below grade to achieve desired height along with sturdy substructure?
The only way i could think of doing this was by excavating 1 foot below grade and putting down couple inches of gravel for soil to wood separation.
I have a feeling this wouldn't work because i've read your footings should extend 2-3" above grade.