I have a barn with a old concrete floor in it.
Column dimension for 2 floor.
Aggregate grade of concrete.
Footing depth varies based on frost line and soil strength some footings can be shallow while other must be deep.
5 8 plywood 3 4 wood floor.
Size of the columns.
So the house dimensions will now be 24 x 13.
Footing thickness 8 to 12 inches.
Let s expand our house beyond that 17 2 span capability to 24 feet wide.
Concrete calculator figure out how much concrete you ll need for your footings.
In case 9 x9 column size is to be used for 1 and half storey structure then it is advised to use m20 1 1 5 3 cement.
For the above column setup a span of up to 5 meters is quite safe.
Find nearby slab and foundation contractors to help with your.
9 x9 columns are to be used for a single storey structure with m15 1 2 4 cement.
The size of the columns are 9 x9 with the use of m20 grade of concrete.
It might transfer loads from a ceiling floor slab roof slab or from a beam to a floor or foundations.
One can use beams of size 9 x 12 225 mm x 300mm with a slab thickness of 5 125 mm cast in m20 concrete for spans up to 5m.
The minimum size of the column should not be less than 9 x9.
The distance between the columns does not exceed 4 5m.
The widest span in the floor joist span table in part 2 of this tutorial module showed that floor joists can span 17 2 if they are 2 x 12s spaced 12 o c.
I think about pour a new 4 4 foot pad area and add shelving under the exist concrete and tying it in with rebar and mesh and adding 1 or 2 columns about 3 to 4 feet depth and10 to 16 inch in diameter driving rebar into the columns for strength.
Cabo one and two family dwelling code.
Aggregate grade concrete.
Commonly columns also carry bending moments about one or both.
Distance between the columns.
Strapping 2x10s 16 o c.
Built up column 2 2x4 studs fastened together for a column 1 4x4 column 60 less capacity.
There are other considerations like secondary and tertiary spans point loads and wall loads which have to be considered.
There are several types of columns which are used in different parts of structures.
The floor itself is has several cracks in the concrete.