For every 2 feet of adjustment to the width of the house, add or subtract 2 inches of footing width and 1 inch of footing thickness (but not less than 6 inches thick). Based on 32-foot-wide house with load-bearing center wall that carries half of the tributary attic, and floor framing.STORY AND TYPE OF STRUCTURE WITH LIGHT FRAMEįor SI: 1 inch = 25.4 mm, 1 plf = 14.6 N/m, 1 pound per square foot = 47.9 N/m 2. TABLE R403.1(1) MINIMUM WIDTH AND THICKNESS FOR CONCRETE FOOTINGS FOR LIGHT-FRAME CONSTRUCTION (inches) a, b SNOW LOAD OR ROOF LIVE LOAD Although when you look at a skyscraper, you’re probably mostly thinking about the architectural elements you can see, the architectural elements under the surface are just as important, and possibly even. Concrete footing shall be designed and constructed in accordance with the provisions of section R403 or in accordance with ACI 332. The foundation of a skyscraper is one of the most incredible architectural elements of a skyscraper. Use an impervious cover sheet or wetted burlap. Footings shall be supported on undisturbed natural soils, compacted fill not more than 12 inches (305 mm) in depth, provided that the fill is adequately compacted using appropriate mechanical means, or engineered fill. At least three days are required at 70F, and longer at lower temperatures. Porches, carport slabs and steps exposed to the weather, and garage floor slabsĪll exterior walls shall be supported on continuous solid or fully grouted masonry or concrete footings, crushed stone footings, wood foundations, or other approved structural systems which shall be of sufficient design to accommodate all loads according to section R301 and to transmit the resulting loads to the soil within the limitations as determined from the character of the soil. MINIMUM SPECIFIED COMPRESSIVE STRENGTH a ( f' c)īasement walls, foundations and other concrete not exposed to the weatherīasement slabs and interior slabs on grade, except garage floor slabsīasement walls, foundation walls, exterior walls and other vertical concrete work exposed to the weather TABLE R402.2 MINIMUM SPECIFIED COMPRESSIVE STRENGTH OF CONCRETE TYPE OR LOCATION OF CONCRETE CONSTRUCTION Materials used to produce concrete and testing thereof shall comply with the applicable standards listed in Chapters 19 and 20 of ACI 318 or ACI 332. The maximum weight of fly ash, other pozzolans, silica fume, slag or blended cements that is included in concrete mixtures for garage floor slabs and for exterior porches, carport slabs and steps that will be exposed to deicing chemicals shall not exceed the percentages of the total weight of cementitious materials specified in Section 19.3.3.4 of ACI 318. Concrete subject to moderate or severe weathering as indicated in Table R301.2(1) shall be air entrained as specified in Table R402.2. Concrete shall have a minimum specified compressive strength of f ' c, as shown in Table R402.2.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |