(A) Footings. All exterior walls shall be supported on continuous concrete footings of sufficient design to safely support imposed loads.
(1) Footings and frost walls at all points shall extend below the frost line, but not less than three feet six inches below grade.
(2) Footings shall be of minimum 3,000 p.s.i. concrete in 28 days, not less than ten inches thick and 20 inches wide and not less than three feet six inches below grade.
(3) Footings shall be reinforced with steel rods when crossing trenches or other unstable conditions.
(4) Footing trenches shall be free of loose dirt and standing water prior to placing concrete.
(5) Provide not less than three #5 rods for cold joints.
(6) Footings shall be hand dug a minimum of one-half the thickness of the footing.
(7) Water stop shall be installed in all footings. (See the graphic illustration in § 150.207.)
(B) Foundations.
(1) Placed foundation walls shall be of minimum 3,000 p.s.i. concrete in 28 days, be supported on footings and extend to a point not less than six inches above finished grade.
(2) Placed concrete foundation walls exceeding 12 feet in length shall be not less than ten inches thick unless backfilled on two sides.
(3) One story slab-on-grade frame buildings may be supported on trenched foundations not less than ten inches thick with flared bottom.
(4) Concrete placed over doors, windows or other openings not exceeding three feet six inches in width shall be provided with two #5 reinforcing rods extended one foot minimum on each side of the opening.
(5) Foundations for frame or brick veneer construction shall be provided with anchor bolts. The anchor bolts shall be not less than eight inches by one-half inch and shall be located not more than four feet on center projecting two inches above the top of the foundation.
(6) (a) Anchorage for intersecting concrete walls and slabs. Provide a four inch shelf in foundation walls or #4 rods 12 inches on center to support slabs, steps or platforms adjacent to the foundation or four inches by four inches by five-sixteenths inch angle steel bolted to foundation wall.
(b) Where a change in grade or height of foundation walls occurs and footings therefore, are not continuous, a minimum of four hooked one-half inch rods not less than four feet long shall be located where the walls adjoin.
(7) Foundation walls shall be waterproofed from the edge of the footing to the finished grade line, with membranes. The membrane shall be two-ply hot mopped felt, six mil. poly vinyl chloride, 55-pound roll roofing or equivalent material. The laps in the waterproofing membrane shall be sealed and firmly attached to the wall. Foundation walls may be waterproofed using materials or methods of construction other than covered in this section when approved by the Director of Community Development.
(8) The typical drawings § 150.188 may be used to graphically interpret division (B)(6) above.
(Prior Code, § 9-111) (Ord. 94-11B, passed 4-21-1994)