1820.5 Concrete slabs outside of buildings, other than patios and pool slabs, where placed directly on the supporting soil, for minor accessory uses such as, but not limited to, walkways, driveways, minor equipment pads, etc, shall be not less than 4 inches (102 mm) thick. Such slabs shall be placed on clean, thoroughly compacted sand or crushed rock free from organics, debris or other deleterious materials. SECTION 1821 HIGH-VELOCITY HURRICANE ZONES- MONOLITHIC FOOTINGS 1821.1 Monolithic footings under walls shall be continuous or continuity otherwise provided and shall be not less than required to keep the soil pressure within that set forth in Section 1818 nor less than the following minimums: Allowable bearing Minimum Depth capacity (Pounds No. of and per square foot) Stories Width(2)(inches) 2000 1 12 x 16(1) 2000 2 12 x 24 For SI: 1 inch = 25.4 mm, 1 pound per square foot = 47.88 Pa. Based on rational analysis and soil investigation as set forth in Section 1818, the footing size or bearing capacity may vary, but the minimum width of a footing under the main walls of the buildings shall not be less than 16 inches nor less than 8 inches more than the width of the foundation wall. NOTES: (1) For single story wood frame exterior walls, the minimum size continuous footing shall be 16 inches deep x 24 inches wide. (2) Any continuous wall footing acting as a shear wall foundation shall be specifically designed for that purpose. 1821.1.1 A minimum outside finish grade of 8 inches (203 mm) above the bottom of the exterior monolithic footing shall be required, but in no case shall the outside finish grade be above the top of the finish slab surface unless sufficient means to minimize moisture intrusion into the structure have been provided to the satisfaction of the building official. 1821.1.2 Continuous monolithic footings shall be placed level and any change in the grade of such footings shall be made with a step of the same cross section and design as the monolithic footings, or the smaller of the monolithic footings, so joined. 1821.1.3 Continuous monolithic footings with eccentric loading shall be designed to limit the soil pressure at the edges to within acceptable values by means of counterbalancing or by other approved methods.
1820.5 Concrete slabs outside of buildings, other than patios and pool slabs, where placed directly on the supporting soil, for minor accessory uses such as, but not limited to, walkways, driveways, minor equipment pads, etc, shall be not less than 4 inches (102 mm) thick. Such slabs shall be placed on clean, thoroughly compacted sand or crushed rock free from organics, debris or other deleterious materials. SECTION 1821 HIGH-VELOCITY HURRICANE ZONES- MONOLITHIC FOOTINGS 1821.1 Monolithic footings under walls shall be continuous or continuity otherwise provided and shall be not less than required to keep the soil pressure within that set forth in Section 1818 nor less than the following minimums: Allowable bearing capacity (Pounds per square foot) No. of Stories Minimum Depth and Width(2)(inches) 2000 2000 1 2 12 x 16(1) 12 x 24 For SI: 1 inch = 25.4 mm, 1 pound per square foot = 47.88 Pa. Based on rational analysis and soil investigation as set forth in Section 1818, the footing size or bearing capacity may vary, but the minimum width of a footing under the main walls of the buildings shall not be less than 16 inches nor less than 8 inches more than the width of the foundation wall. NOTES: (1) For single story wood frame exterior walls, the minimum size continuous footing shall be 16 inches deep x 24 inches wide. (2) Any continuous wall footing acting as a shear wall foundation shall be specifically designed for that purpose. 1821.1.1 A minimum outside finish grade of 8 inches (203 mm) above the bottom of the exterior monolithic footing shall be required, but in no case shall the outside finish grade be above the top of the finish slab surface unless sufficient means to minimize moisture intrusion into the structure have been provided to the satisfaction of the building official. 1821.1.2 Continuous monolithic footings shall be placed level and any change in the grade of such footings shall be made with a step of the same cross section and design as the monolithic footings, or the smaller of the monolithic footings, so joined. 1821.1.3 Continuous monolithic footings with eccentric loading shall be designed to limit the soil pressure at the edges to within acceptable values by means of counterbalancing or by other approved methods.
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