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<br />tical member, including anticipated scour depth, <br />a vertical member size is chosen which is capable <br />of supporting that load consistent with the soil <br />bearing capacity of the site. <br />Consider a 14 foot by 66 foot manufactured <br />home having a 99-inch chassis I-beam spacing <br /> <br />with a desired elevation of five feet above grade <br />and a recommended support spacing of eight feet <br />located in a 25 psf wind load and 20 psf roof live <br />load zone, where no scour is anticipated and soil <br />bearing capacity is 3,000 psf as shown in Figure <br />4.36. <br /> <br />Table 4.14 <br /> <br />1 <br />VERTICAL MEMBER CAPACITY (pounds per member) <br /> <br />Wind Design = 15 psf <br />Home Width = 14 feet <br /> <br /> Vertical Menber Diarreter (in. ) <br /> Square3 Round4 <br />Length2 <br />(ft. ) 4 6 8 10 12 4 6 8 10 12 <br />1 2454 8049 17674 31674 50245 2261 6672 14048 24678 38749 <br />2 1461 5113 11804 22019 36093 1321 4112 9046 16482 26690 <br />3 1040 3746 8861 16875 28161 933 2972 6671 12373 20355, <br />4 805 2956 7093 13679 23087 720 2327 528,4 9904 16450 <br />5 656 2441 5913 11501 19562 586 1912 4374 8256 13803 <br />6 552 2074 5069 9921 16971 493 1620 3732 7078 11lHl9 <br />7 475 1804 4431 8723 14986 425 1406 3254 6195 10441 <br />8 413 1595 3936 7783 13417 373 1241 2881 5507 9308 <br />9 363 1427 3540 7017 12145 330 1110 2585 4957 8397 <br />10 323 1289 3215 6391 11094 295 1004 2345 4501 7648 <br />11 291 1173 2943 5867 10196 266 915 2144 4125 7022 <br />12 264 1073 2711 5421 9439 242 839 1974 3806 6482- <br />13 241 984 2512 5036 8786 222 773 1829 3532 6024 <br />14 222 907 2337 4701 8215 205 715 1702 3294 5625 <br />15 - 841 2182 4405 7713 190 664 1591 3085 5276 <br />16 - 783 2043 4143 7267 177 619 1492 2901 4966 <br />17 - 732 1915 3908 6868 - 580 1403 2736 4691 <br />18 - 687 1800 3695 6509 - 545 1321 2588 4443 <br />19 - 647 1696 3502 6184 - 514 1247 2454 4219 <br />20 - 611 1604 3323 5887 - 486 1180 2331 4016 <br /> <br />lMaxilrumcapacity limited to bearing capacity of soil; i.e., if soil <br />capacity is 4000 psf, that becomes the limiting factor in determining <br />configuration or end bearing area must be increased. <br /> <br />2Length is determined as total height above and below grade with depth of <br />embedment greater than or equal to the height above grade but not less than <br />six feet plus the addition of scour depth as previously discussed. <br /> <br />3Rough dimensions. NOminal dimension will be 1/2 inch less per side on <br /> <br />square posts. <br /> <br />4Rough dimension as diarreter of round member. <br /> <br />55 <br />