FOOTING AND FOUNDATION CODES DETAILS
1. Detached accessory building 120 square feet or less:
(a) No requirements for footings
2. Detached accessory building 120 square feet up to 721 square
feet:
a) 12" x 12" grade beam poured monolithic
with slabs
3. Detached accessory building above 721 square feet:
(a) Requires 12" x 3' deep wall with
no footings or 8" wall with 8" x 16" footings 36" to bottom of footing.
4. Attached structures built as year round additions, despite square
footage, monolithic pour, or crawl space. NOTE: this includes sunrooms.
If bearing of structure is on piers, 36" deep is allowed, however,
it requires design by builder's engineer and approved by Building
Department:
(a) Requires 12" x 3' deep wall with
no footings or 8" wall with 8" x 16" footings.
5. Crawl space free standing foundation (no slab):
(a) Requires 12" x 3' deep wall with
no footings or 8" wall with 8" x 16" footings.
6. Attached structures or free standing with pole type construction:
(a) Poles must set on 8" thick footing
pier 42" below grade.
7. Monolithic pour for such additions as porch enclosures, screened
porch, garage, etc.:
(a) Requires 12" x 3' deep wall with
no footings or 8" wall with 8" x 16" footings.
8. Existing 4" pad to be built on:
(a) Add 12" x 36" poured wall or 8"
wall with 8" x 16" footings.
9. Porches not carrying loads or structures:
(a) Footings not required.
10. Porches carrying roof, porches with pole construction:
(a) Requires 12" x 3' deep wall with
no footings or 8" wall with 8" x 16" footings. Poles must be set
8" thick footing pier 42" below grade.
11. Wheel chair ramps:
(a) Follow ADA requirements. There
are no footings required.
12. Porches:
(a) Any porch higher than 30" requires
a railing around entire perimeter and down steps.
NOTE: When performing any of the above foundation work,
a call to the Building Department for an inspection is required.
It is best to call a day before pouring, but if not at least by
9:00am morning of the pour.
Mishawaka Building Department
Phone: 258-1607 Fax: 258-1608
Revised 07/09/01
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