Deck Footings

Old 04-15-02, 05:33 AM
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Deck Footings

I am building a 16' x 16' deck and am a novice. I live in an area that has heavy frost in the winter and I want to know how many footings I need for this deck. It will be attached to the house and part of it will sit on an existing 4' x 8' steel frame (from a previous balcony). I know I need cement footings, and have been told they need to be 4' deep. How many would I need? What spacing? Could I use cement footing around the exterior of the deck and decking spikes on the interior of the deck? I was thinking of 4 cement footings at 8' intervals, then decking spikes in between.
Old 04-20-02, 05:34 PM
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The number of footings depend on how big your beams (how for the beam can span). The number of beams you need depends on the size of your joists.

A 16x16 deck with a two foot catalever and one side attached to a house can be constructed with two footings.

I decide how many footings to put in by what the soil conditions are. If I am building in sand and the deck is only two feet of the ground, I will save money by putting in six footings. If I am building in dry rocky clay that has no access to a bobcat with auger, I use less footings and make the beams and joists larger.

Your local lumber yard can help you with joist and beam sizing.

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