Hello
Looking at building a 24x24, two car garage with 2nd story...what are the footing options for this?
Attached to the backside of the garage, I would like an extension of approx. 26 feet for a workshop. The back extension would only be single story/ground level. Can I simply use footings similar to a pole barn for the back portion?
The total project size would be 24x50, with a 24x24 two story garage in the front, and a 24x26 single story rec.room on the backside.
Thank you
Maximum size for a concrete slab on grade (without engineering) is 55 sq. meters - typical 24 x 24 single storey detached garage. You would not be permitted to add on to this kind of structure unless perhaps differential movement between the two structures could be accommodated without damaging either part.
One option would be strip footing & concrete wall minimum 1.2 m below grade which can be done without engineering.
Another option would be pile and grade beam which would require engineering.
Helical screw piles are engineered by the supplier and are another option.
Pole barn footings would also require engineering (also the structure if framing members are more than 600mm (24") o/c.)
If you have a good bearing from the ground, you can use regular strip footing. If where you are located the frost
Is depth is high, the best option would be to use helical screw piles. They are cheap and engineered and can provide a really good bearing capacity.
Regards,
Iraj 604-306-7505
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