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3 <br /> � v M <br /> `4rtaiNt. P,Wirt( NORTI11%EST ENGINEERING, INC. <br /> Loading Tope Maximum Factor Design Allowable <br /> Reaulred of Safety Loading Loading <br /> Lateral Shear 376 plf 2.0 752 plf 817 plf <br /> Lateral Up-lift 1,415 lb 2.0 2,830 lb 3,007 lb <br /> Vertical(Gravity) 720 plf 2.0 1,420 plf 9,210 plf• <br /> *(The "Allowable Loading"Jot "Vertical(Gravity)"is limited by the capacity of <br /> the 2" thick concrete wall under test loading, not the capacity of the fooling size. <br /> The capacity of the designed footing is 1,500 plf, based on a soils bearing of <br /> 1,500 psf However, as shown by a design loading of 720 plf(gravity loading <br /> need not include a saferyfactor)the footing will also meet the requirements. Also <br /> see the retaining wall calculations.) <br /> The Empirical test results show that even with a conservative factor of safety of 2.0 the <br /> Smart Foundation RB-54' (SF-RB54) system meets or exceeds all the code requirements <br /> for the title 25 California code of regulations division Chapter 2 section 1336.2 and <br /> Health and Safety Code section 18613.4, the "poured in place"type foundation from the <br /> "Permanent Foundation Guidebook for Manufactured Housing" 4145.1 Rev, 2 and <br /> 4150.1 Rev. 1 (9-96) and also with the manufactures pier point lay-out. It also meets or <br /> (( exceeds all of the requirements of the HUD-7584 Handbook. <br /> `r Quality Control <br /> It is our understanding that Umpqua Testing Service has been authorized by Cornerstone <br /> Foundation System to make random tests of inventoried product and pmduce a report on <br /> the test when needed or requested by any authority having jurisdiction. <br /> If you have any questions please feel free in calling me. <br /> Thank YY000u, . <br /> �� <br /> Mark Ellingso , E <br /> President ', ' / <br /> C WORK&IaNG<nR✓k STO M MK „ <br /> e <br /> i Lall:la R. <br /> Letizia Wetzel,PE <br /> t it rr +. <br /> ' c V .' 47 ----Are' pf 0 , �){` " f <br /> / 4Fi lk � i � i � <br /> (( 4242 Silver Falls Ur. \.fax <br /> V(5op OR. 7381 <br /> ' ph '# (503)873-3184 fax It(603)'$7a 3967 - - `' <br /> P.E.11 13,676 - <br />