A. General:
1. Materials: See Section 8-1A-3-4 hereof.
2. Water content not to exceed seven (7) gallons of water per bag of cement, including moisture in the aggregate (except as noted).
3. Maximum slump, six inches (6") (except as noted).
4. Retempering of concrete not permitted.
5. Calcium chloride may be used as an accelerator but shall not exceed two (2) pounds per bag of cement.
B. Quality of Concrete:
1. Commercial Ready Mix:
a. Minimum Portland cement content: Five (5) bags per cubic yard.
b. Water shall not be added at the job.
c. Mixing period shall not extend beyond one and one-half (11/2) hours per batch. (Where an accelerator is used, mixing shall not exceed one hour per batch.)
2. Exposed Concrete (Pavements, Sidewalks, Curbs and Gutters, Open Slabs, Etc.):
a. Minimum cement content, six (6) bags per cubic yard except five (5) bags per cubic yard with three percent (3%) to six percent (6%) air-entrainment.
b. Maximum slump, four inches (4").
c. Maximum water content, six (6) gallons per bag of cement including water in the aggregates, except seven (7) gallons per bag with three percent (3%) to six percent (6%) air entrainment.
3. Hardened Concrete: To determine the quality of hardened concrete, the water-cement ratio for a tested compressive strength shall be found in table 5, "Compressive Strength of Concrete for Various Water-Cement Ratios" of "Recommended Practice for Selecting Proportions for Concrete" (A.C.I. 613-54) published in the Proceedings of the American Concrete Institute, Volume 51. The water-cement ratio thus established will determine whether or not the concrete meets the Code requirements.
C. Reinforced Concrete: The design and construction of reinforced concrete shall be in accordance with the provisions of the "Building Code Requirements for Reinforced Concrete" (A.C.I. 318-56) published in the Proceedings of the American Concrete Institute, Volume 52.
D. Forms:
1. Double forms required for all basement concrete foundation walls.
2. Side forms required for footings where soil conditions prevent sharp-cut trenches.
3. Build tight, straight, plumb, and brace rigidly.
4. Do not remove until concrete has thoroughly set.
5. Remove all forms, spreaders and stakes before backfilling.
E. Placing:
1. Place continuously unless otherwise allowed by Building Official.
2. When not placed continuously, clean score and wet the top surface of the concrete before continuing. Key all vertical joints.
3. Spade and rod concrete thoroughly in form work. Place in horizontal layers not more than twelve inches (12") thick.
F. Protection:
1. Concrete shall be protected from drying for a minimum of five (5) days.
2. Concrete shall be maintained at temperatures of not less than:
a. Seventy degrees Fahrenheit (70°F) for three (3) days or fifty degrees Fahrenheit (50°F) for five (5) days for normal concrete.
b. Seventy degrees Fahrenheit (70°F) for two (2) days or fifty degrees Fahrenheit (50°F) for three (3) days for high early strength concretes.
G. Loading: Allow sufficient time for strength of concrete to develop before subjecting to loads or traffic. (Ord. 0-71-12, 3-11-1971)
H. Footings:
1. General:
a. Design for proper distribution of superimposed loads.
b. Materials: Cast in place concrete.
c. Bear on solid, unfilled ground.
Exception: When in compliance with the applicable village ordinances, footings may be placed on filled soil of an appropriate composition and compacted to a minimum of ninety five percent (95%), as measured by the ASTM D 1557 (modified) laboratory procedure.
d. Reinforce with steel bars where footings cross or bear on filled trenches or other unstable soil.
e. Footing dimensions listed below are based upon soils of average bearing capacity (3,000 pounds per square foot). For soils of lesser bearing capacity or where unusual loading conditions exist, larger footings will be required.
2. Wall Footings: Minimum dimensions for spread footings shall be ten inches (10") deep by twenty inches (20") wide.
3. Pier, Post And Column Footings For Dwellings: Minimum area, six and twenty five one-hundredths (6.25) square feet; thickness, one and one-half (11/2) times the projections, minimum twelve inches (12"). (Not permitted under exterior walls.)
4. Chimney Footings:
a. Dwellings: Minimum thickness, twelve inches (12"); minimum projection each side, six inches (6").
b. Pour integral with wall footing when chimney occurs in outside wall or inside bearing wall. (Ord. 2006-779, 6-8-2006)
I. Footing Drain Tile: See ASTM C4-55 (54T).
1. Required outside or inside (if inside, at least 2 feet from footings) of basement footings. Minimum diameter, three inches (3").
2. Cover tile with eight inches (8") gravel, or crushed stone; ninety five percent (95%) passing three-fourths inch (3/4") mesh, less than five percent (5%) passing three-eighths inch (3/8") mesh.
3. Connect with tight joint glazed tile to storm sewer, dry well or other outlet.
1. General:
a. Materials: See section 8-1A-3-4 of this article.
b. Walls supporting frame construction: Extend concrete not less than six inches (6") above adjoining outside finished grade.
c. Walls supporting masonry veneered wood frame: Extend foundation so that wood portion of wall is not less than six inches (6") above outside finished grade.
2. Minimum Thickness:
a. Not less than that of wall supported.
b. Supporting porch slabs, steps and one-story wood frame structures without basement, minimum eight inches (8").
c. Interior walls not subject to lateral pressure, six inches (6") minimum.
d. Exterior walls subject to lateral pressure, to be a minimum of ten inches (10") thick with reinforcing bars at top and bottom when wall heights exceed four feet (4') in height; when less than four feet (4') in height, eight inch (8") thickness shall be minimum.
3. Girder Pockets: Provide four inch (4") end bearing on main wall for girder. For pocket for wood girder one inch (1") wider than girder.
4. Sill Anchor Bolts To Be Installed:
a. Diameter, one-half inch (1/2") minimum.
b. Minimum length, ten inches (10").
c. Provide washer under nuts on bolts.
d. Spacing, not more than eight feet (8') on center; minimum, two (2) bolts in each piece.
5. Anchorage For Intersecting Walls And Slabs: Provide dowel bar anchorage for porch and terrace slabs, concrete or masonry steps and area walls, which adjoin foundation walls. For basementless portions and attached garages, imbed four (4) 1/2-inch round hooked bars four feet (4') long in main wall, two (2) near top and two (2) near bottom of attached wall.
6. Chimney Foundations: Start at level of lowest adjacent foundation wall footings.
7. Special Or Unforeseen Soil Conditions: If special or unforeseen soil conditions warrant, the Building Official may require either reinforcement of wall or increased thickness.
8. Dampproofing And Waterproofing: See subsection 8-1A-3-6C of this Article. (Ord. 0-71-12, 3-11-1971)
K. Concrete Floor Slabs On Ground: No floor slab to be placed in water or on a soft wet subgrade. Basements must be pumped dry at least twenty four (24) hours before floor is poured.
1. Construction:
a. Fill Under Slabs: Gravel, screenings or crushed rock, minimum thickness four inches (4"), thoroughly tamped.
b. Wire Mesh Reinforcing: When required, minimum weight forty (40) pounds per one hundred (100) square feet.
c. Bottom Of Slab: Not lower than top of footing. Provide at least four inch (4") bearing on footing.
d. Backfill: All backfill of excavated material under concrete slabs shall be gravel, screenings or crushed rock, thoroughly tamped. (Ord. 99-570, 5-13-1999)
2. Cement Floor Finish:
a. Finish basement slab with steel trowel.
b. Integral finish on concrete slab.
3. Slabs On Ground Used As A Base For Floors Or As A Finish Floor In Habitable Rooms:
a. Minimum thickness, four inches (4").
b. Provide membrane waterproofing directly under slab, at least thirty (30) pound felt, lapped four inches (4").
c. Provide perimeter insulation. Insulating material shall be noncapillary waterproof not subject to deterioration by termites or fungi.
4. Basement Floor Slabs: Minimum thickness, four inches (4").
5. Garage Floor Slabs: See Section 8-1A-3-15 of this Article.
6. Terrace And Porch Floor Slabs:
a. Minimum thickness, four inches (4").
b. If reinforced, fill may be omitted.
c. Install metal flashing between slabs and all wood construction. See subsection 8-1A-3-11F of this Article.
7. Slabs On Ground Used To Support Interior Bearing Walls Or Partitions: Thicken to at least ten inches (10") for a width of twenty inches (20").
L. Exterior Wood Stairs: Wood construction shall be at least two inches (2") above walk or finished grade.
M. Reinforced Concrete Floor on Precast Joist:
1. Minimum bearing of joists, three inches (3").
2. When span exceeds fifteen feet (15'), shore at midspan until slab is set.
3. Structural design based on T-beam action not acceptable when metal lath or paper backed mesh is used for slab forms. (Ord. 0-71-12, 3-11-71)
Notes
| 1 | 1. For masonry unit foundation walls, see section 8-1A-3-6 of this article. |