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install Footings <br /> TYPICAL FLOOR Figure 12.Perimeter sup- <br /> JOIST <br /> r ports <br /> rytEXTERIOR J jy: j WOOD WEDGES <br /> WALL <br /> PRESSURE TREATED OR <br /> ass HARDWOOD 4x4 OR TWO <br /> } � ,---CAP BLOCK 2x4's NAILED TOGETHER <br /> ON EDGE.MUST SPAN A <br /> FLOOR RIM �i MINIMUM OF TWO FLOOR <br /> JOIST JOISTS. <br /> , -----_ <br /> 1 <br /> M <br /> S BACKFR SETBACK FROM <br /> EDGE OF FLOOR--- <br /> BLOCKS PARALLEL WITH EDGE OF FLOOR BLOCKS PARALLEL AND RECESSED BACK <br /> FROM EDGE OF FLOOR <br /> • If footings are rectangular, orient them so that the long side is perpendicular to <br /> the home's I-beam. <br /> • Place the bottom of footings on undisturbed soil or fill compacted tc at least <br /> 90°Jo of its maximum relative density. ®Excavation. If <br /> • In freezing climates protect footings from the effects of frost heave in accord excavation is required. mark <br /> ance with any LAHJ requirements(see Prepare the Site p. 15). Place the bat- the footing locations on the <br /> tom of the footings below the frost line. Insulated foundations or other frost pro- ground with stakes before <br /> tection options are acceptable when designed by a registered engineer or reg- <br /> istered architect. Monolithic slabs are allowed above frost depth when de- <br /> signed by a registered engineer or registered architect to resist the effects of <br /> frost heave. Anchorage requirements must be included with each registered <br /> engineer or registered architect design when the anchorage requirements <br /> listed in this manual cannot be accommodated. Prior to obtaining an alternative <br /> design contact the home building facility for available approved alternative de- <br /> signs or instructions for submitting an alternative design. <br /> • Make sure the top surface of the footing is level. flat and smooth. <br /> 00.. go to Set the Home(p. 38) <br />