I need to build some new footings under my house to act as support for some load points for a second story addition.
My plan is to build a new 24x24x12 block followed by a couple of courses of concrete blocks–this is where I have questions–what is the best practice for getting from the blocks to the doubled 2×10.
option one: use a PT 6×6 and connect to block and 2×10 with simpson ties.
option two: use a steel foundation post cut to size.
option three: use a screw jack
option four: continue up to the 2×10 with concrete blocks and then use pt 2x to shim to hieght.
Any advice would be very much appreciated.
cje
Replies
Drawing on the left would be my pick, with the block slushed full of concrete. From the pier to the beam I would use a shot lally column if the local code and AHJ approves them.
Dave
Around here (no seismic codes) the steel column is by far the most popular method. Unless there is not much height involved here, this would probably be less labor as well.
Some screw top columns are rated for permanent install, but many do not meet fire codes.
The last option is easiest and best. Make the piers either 16"x16" or 24"x 24" . Some times I don't have access to half blocks, then I plan for 24"square piers.I make the footing 8" larger than the pier and 8" to 10" deep.Asphalt shingles make good shims for small gaps.
mike