Foundation Drawing
For Reference Only
CONCRETE NOTES:
- Concrete – this concrete design is for “suggestion only”; local building codes and site conditions need to be considered as well. All exterior concrete shall be air-entrained from a minimum of 4% to a maximum 8%. Admixtures containing calcium chlorides shall not be added to the concrete. Concrete shall have 28-day cure yielding a minimum strength of 3000 psi.
- Reinforcing bars – reinforcing bars shall conform to ASTM a615 and shall be lapped a minimum of 8” at splices.
- Reinforcing mesh – welded wire fabric (WWF) shall conform to ASTM a185 and shall be lapped a minimum of 8” at spaces.
- Concrete slabs – slabs-on-grade shall be built over a 4” layer of #57 stone and over a 6 mil polyethylene vapor barrier.
- Subgrade for footing – footings shall bear on natural undisturbed soil (or tested control fill) with a minimum allowable bearing capacity of 2000 pounds per square foot.
- Subgrade for slabs – slab on grade shall bear on natural undisturbed soil (or tested control fill) with a minimum allowable bearing capacity of 2000 pounds per square foot. If slabs-on-grade is less than 24” above acceptable undisturbed soil, they may be constructed on up to 24” of self-compacting aggregates, such as #57 stone, in lieu of tested control fill or being designed as structural slabs.
- Concrete slab finishes – concrete finish shall be smooth-trowel class-a (flat within 1/8” in 10’-0”) for foundation pad; and shall be broom-finished class-b (flat within .” in 8’-0”) for optional perimeter slabs. Foundation pad surface shall be level. Optional perimeter slab shall slope 1” away from the building.
- Construction – concrete material and methods of construction shall conform to the building code listed on page one. Sawed crack control joints shall be cut in concrete between 8 and 16 hours after the concrete is placed.
FOUNDATION NOTES:
- These foundation details are only suggestions. The foundation system should be properly designed based on the actual soil conditions at the site and in accordance with the state requirements and regulations. Changes may be necessary due to local building requirements and regulations.
- The foundations shall be founded on natural undisturbed soil capable of sustaining 2000 PSF. This shall be designed to fully resist all rotation at the base of the building.
- Slab on grade shall be placed on well-compacted soil capable of sustaining 2000 PSF without appreciable settlement.
- The main slab width shall be the cl to cl anchor bolt dimension plus 24”.
- The main slab length shall be the cl to cl anchor bolt dimension plus 24”.