Keeping this in consideration, how much concrete do I need for deck footings?
One 80-lb bag of concrete yields .60 cubic feetwhen combined with 4 quarts of water. If you're purchasing 80-lbbags of concrete, you'll need 1.66 bags of concrete.As before, since bags of concrete are only sold in wholequantities, you'll need to purchase two (2) 60-lb. bags ofconcrete to form one cubic yard.
Beside above, how deep do footings need to be for a porch? We quote for a fixed depth of foundation, for aporch 450mm would be good, if building control wantit deeper, the customer has to dig deeper in theirpockets. For building control and architects specify this, aminimum of 1000mm is required for all works, but in practice werarely need to dig this deep.
Also know, do you need rebar for deck footings?
Footings with large bearing areas or unstablesoil can benefit from adding rebar to preventcracking. When rebar is placed within a footing, itshould be completely encased in concrete by a minimum of 3inches on all sides. When rebar is allowed to project out ofthe footings, it is susceptible to more rapidcorrosion.
Can I use deck pier blocks instead of footings?
A deck pier block is in many ways just asimplified version of a “precast foundation”, afoundation type recognized by building codes. They're subject toall of the same requirements as a typical footing,regardless of not being cast-in-place. The small bearing area ofpier blocks is limited in supporting much load.
