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<br />Requirements, for additional information. Garage <br />or carport floor surfaces shall be sloped to a drain <br />or toward the main vehicle entry doorway. <br /> <br />STRUCTURAL <br /> <br />FOUNDATION ANCHORAGE: <br />7. IRC Section <br />R403.1.6 & R602.11. Anchor bolts shall be not <br />MIN. CONCRETE FOOTING SIZE; <br />1. IRC Section <br />less than ½” diameter, embedded at least 7”, and <br />R403.1, R403.1.3. <br />spaced no more than 6’ apart. (4’ if over 2 <br /> <br /> Supporting 1 floor: minimum 6” by 12”. <br />stories). There shall be a minimum of 2 bolts per <br /> <br /> Supporting 2 floors: minimum 6” x 15”. <br />piece (sill plate), with a bolt located within 12” of <br /> <br /> Supporting 3 floors: minimum 8” x 23”. <br />each end of each piece. 3” x 3” x 0.229” thick hot <br />All exterior walls shall be supported on continuous <br />dipped galvanized plate washers, and nuts shall <br />footings or other approved structural systems of <br />be tightened on each bolt to the plate. If <br />sufficient design to accommodate all loads and to <br />foundation anchor straps are used instead of <br />transmit the resulting loads to the supporting soil within <br />anchor bolts, they shall be spaced no more than <br />the limitations determined from the characteristics of <br />4’ apart (3’ if over 2 stories). <br /> <br />the soil. Footings shall be supported on undisturbed <br /> <br />DAMP-PROOF FOUNDATION WALLS: <br />8. IRC <br />natural soil or engineered fill. As a minimum standard, <br />Section <br />R406 Exterior foundation walls that retain <br />see Prescriptive Foundation Requirements, on Page <br /> enclose habitable or usable spaces <br />17. <br />earth and <br /> <br />located below grade shall be damp-proofed in <br />MIN. CONCRETE FOOTING REINFORCEMENT: <br />2. <br />accordance with IRC R406.1 or waterproofed in <br />IRC Section 403.1.3. At least two #4 bars are <br />accordance with IRC 406.2, from the top of the <br />required for all continuous concrete footings. As a <br />footing to the finished grade by approved methods <br />minimum standard, see Prescriptive Foundation <br />and materials. All joints in membrane waterproofing <br />(Vertical bars shall be <br />Requirements on Page 17. <br />shall be lapped and sealed with an adhesive <br />tied in place at the time of the footing inspection. <br />compatible with the membrane. <br />Wet setting of vertical bars will not be approved.) <br /> <br /> <br />PIER PADS & COLUMNS: <br /> 9. IRC Section <br />MIN. CONCRETE FOUNDATION WALL SIZE: <br />3. <br />R407.3. Concrete pier footings shall have a depth to <br />8 <br />IRC Section 404.1.2, Walls that exceed feet in height <br />width ratio not to exceed 2:1, or, shall have #4 bars <br />or have more than 4 feet of unbalanced fill and no <br />located each direction spaced not more than 12” on <br />permanent lateral support at the top of the wall, <br />center. (Rebar must be in place upon inspection.) <br />must be designed, signed and sealed by a Licensed <br />Positive connections shall be provided to prevent <br />State of Hawai‘i Design Professional. <br />lateral displacement at both the top and bottom of <br /> <br />MIN CONCRETE FOUNDATION REINFORCE-columns. <br />4. <br /> <br />MENT: Steel reinforcement <br />IRC Section R404. <br />FOOTING/PIER SETBACK FROM SLOPE: <br />10. IRC <br />shall have minimum yield strength of 60,000 psi <br />Section R403.1.7 The placement of buildings and <br />(Grade 60). <br />As a minimum standard, see Prescriptive <br />structures on or adjacent to slopes steeper than 1 <br />Foundation Requirements on Page 19. <br />unit vertical in 3 units horizontal (33.3%) slope shall <br /> <br />MINIMUM FOOTING DEPTH: <br />5. IRC Section conform to Sections R403.1.7.1 through R403.1.7.4. <br />R403.1.4. All exterior footings shall be placed at least (See also IRC Figure R403.1.7.1) Footings must be <br />12“below the undisturbed ground. Interior footings embedded in material sufficient to provide vertical <br />supporting bearing or bracing walls and cast and lateral support for the footing without detrimental <br />settlement. <br />monolithically with a slab on grade shall extend to a <br /> <br />depth of not less than 12” below the top of slab. <br />CHIMNEY FOUNDATION: <br />11. IRC Section R1001.2 <br /> <br />SLAB ON GRADE FLOOR: <br />6. IRC R403.1.3.2 and R1003 Masonry chimneys shall be supported on <br />foundations of solid masonry or concrete at least 12 <br />IRC R309.3. Foundations must extend at least 6” <br />inches thick, at least 6 inches beyond each side of <br />above finish grade. Monolithic foundations shall <br />the exterior dimensions of the chimney, be at least <br />have footings at least 12” wide, be at least 12” below <br />grade, extend at least 6” above finish grade, and shall 12” below grade, and on natural undisturbed earth or <br />have at least two #4 bars at the bottom of the engineered fill. Reinforcement shall conform to the <br />footing and one #4 bar located within 7 inches of requirements set forth in Table R1003.2 and IRC <br />the top of the slab. See Page 19, Foundation <br />Figure R1001.1. <br />The County of Hawai‘i is an Equal Opportunity Provider and Employer <br /> <br /> <br />101 Pauahi Street, Suite 107 74-5044 Ane Keohoklole Hwy <br />ā <br />Hilo, Hawai‘i 96720 Kailua-Kona, Hawai’i 96740 <br /> <br />Tel: (808) 961-8331 Page 11 Tel: (808) 323-4720 <br /> <br />