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FOUNDATION AND SUPPORT REQUIREMENTS (Continued) TABLE 2, PIER LOADING UNDER MAIN I-BEAMS DOUBLE-WIDE HOMES 20' WIDE HOMES,· ~4',WIDE HOMES 26' & '28' wlbE HOMES Pier Pier Load Pier Load Pier Load Pier Load Pier Load Pier Load Pier Load Pier Load Pier Load Spacing (Lbs) (Lbs) (Lbs) (Lbs) (Lbs) (Lbs) (Lbs) (Lbs) (Lbs) Under Main 20 PSF 30 PSF 40 PSi= 20 PSF 30 PSF 40 PSF 20 PSF 30 PSF 40 PSF I-Beams Roof Roof Roof Roof Roof Roof Roof Roof Roof '(Ft) Zone Zone Zone Zone Zone Zone Zone Zone Zone ~' 1810 2060 .... 2170 2100 "23~0"' 2560 2366 2680 2940 5 2370 2580 2710 2630 2980 3190 2950 3350 ...... 3670 6 2720 3100 3260 3150 3580 3830 3540 ........ 4.g20 4410 -- '/ 3170 3610 8800 3680 4180 4470 4130 4690 5140 8 3630 ...... 4130 4340 420~"' 4770 5110 4720 5360 5880 --'~'" 4080 4640 488C~ ..... 4730 5370 5750 '531,0.., 6030 6610 10 --4540 5160 5420 '5'250 5970 6380 5900 6700 7340 wi Put Foot 454 516 542 525 597 638 590 670 734 See Note 5 NOTES: 1 See Table 4 for minimum footing sizes based on pier loads and allowable soil bearin9 capacities. The fooling sizes and pier loads are minimums roquired for the applicable conditions. The footing shall not be smaller thsln the pier it supports or 144 square inches. 2. The r'rtaxir'6ufla spacie9 of supports is not to exceed 10 feet. 3 Where it is h'npracttcal to maintain spacing, such as in the axle area, the average of the distance to each adjacent support may be used to determine support requirements: for example: if the distances to the adjaceot supports were 6:0" and 8:0", the average spacing would be 7:0". 6:0" 8:0" Pier A Pier B Pier C The average spacing for pier B would be (6 + 8) / 2 = 7 ft., therefore, p~er B would be designed for 7 ft. pier spacing. Concentrated loads at marriage line (see Table 3), The last line in the above Table is the weight per foot each main I-beam is carrying, Multiply this rlurnber by the span a pier is carryiog to determioe Ihe required capacity of that pier, 11