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411. 161n[iat PACIFIC NORT115V EST ENGINEERING, INC. <br /> Cornerstone Foundation System LLC February 18. 2020 <br /> 141) Art Mill Lane <br /> Roseburg,OR 97471 <br /> PATENT No. US 9,109.355 B I <br /> Re: Design Criteria Verification <br /> "Smart Foundation"Running Bond 54 (SFRB-54), Ledge Stone 60 (SFLS-60), Smooth 60 (SFS- <br /> 60), and "Poured in Place" Footing or "Poured Concrete Runners", Pre-cast Concrete PC-48 <br /> Footing (16" x 48" x 2 '/"), Pre-cast Concrete Masonry Unit Footing (CMU 16" x 16" x 4"), <br /> Composite Board Footing(I ',"x 6")or Pressure Treated Lumber Footing(2" x 6'). <br /> Dear Norris, <br /> At the request of Cornerstone Foundation System LTC, Pacific Northwest Engineering has rexiewxl the <br /> empirical testing performed by Cornerstone Foundation System, as witnessed and documented by Umpqua 'testing <br /> Services. It is my conclusion the test results and calculations prove that the"Smart Foundation' Running Bond 54 <br /> (SFRB-54), Ledge Stone 60 (SFLS-60). Smooth 60 (SFS-60), and Precast Concrete PC-48 Footing (I() x 48" x 2 <br /> i"), Pm-cast Concrete Masonry Unit Footing (CMU 16'- x 16" x 4"). Composite Board Footing (I 1" x 6') or <br /> Pressure Treated Lumber Footing (2" x 6') when used in eonjune!ion with Cornerstone Foundation System is <br /> acceptable as a lateral and vertical force resisting system for wind zones I, 11, and Ill with a "C" exposure and a <br /> seismic design category"D11'', Ss-1.384, Fa=LO, 1445 lateral load. In addition,an 801bi Sq. Ft-roof load and up to a <br /> 30" lateral soil loads may be resisted simultaneously. SFRB 54 SI 5-60, and SFLS-60 also meet or exceed the design <br /> ihr requirements of"poured in plait. or "poured concrete runners" type foundation from the "Permanent Foundation <br /> Guidebook for manufactured Housing' 4145 1 Rev. 2 and 4150.1 Rev (1996) and also with the manufacturer pier <br /> point layout.The installation also meets or exceeds the design requirements of the HUD 7584 Handbook.This allows <br /> the SFRB-54, SITS-60 and SFS-60 to meet foundation certification for all HUD, 191A and VA lending on <br /> Manufactured housing provided that the SFRB-54, SFLS-60 and SFS-60 installation instructions are followed. It also <br /> meets or exceeds the requirements of Section 1333, Chapter 2, Title 25 of the California Administrative Code and <br /> 18551 of the Health and Safety Code. Cornerstone Foundation System meets or exceeds the Oregon 2010 <br /> Manuthetured Dwelling Installation Specialty Code and the Model Manufactured I lousing Installation Standards. <br /> Cornerstone Foundation System can also be used in flood hazard areas except with composite hoard or pressure <br /> treated lumber footing which allows up to 40 lbs roof load and 24"soil back fill. <br /> Test results and engineering calculations are available to authorities having jurisdiction when requested. <br /> Mark Ellingson, PE <br /> Additional Inhumation: <br /> Contact Person homy System <br /> h t A S <br /> Come: 54 Foundation Svs[em TLC <br /> Phone: (541) 733 5441 <br /> Email: cornerstonefoundationsystem@yahoo.com <br /> @yahoo-corn <br /> ikuova mnM m�raxar <br /> 4242 Silver Falls Dr. N„Silverton,012. 97381 <br /> ph # (503) 873-3184 fax# (51)3) 873-3907 <br /> P.E. # 13,676 <br /> Page 5 of 13 <br />