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nA1( �Ukr/ryla <br /> ift4r <br /> PACIFIC'PACIFIC' NORTHWEST ENGINEERING,INC. <br /> Cornerstone Foundation System LLC July 13, 2018 <br /> 140 Art Mill Lane <br /> Roseburg, OR 97471 <br /> PATENT No. US 9,109,355 B1 <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 ''Va"), Pre-cast Concrete Masonry Unit Footing (CMU 16" x 16" x 4"), <br /> Composite Board Footing(1 V.."x 6")or Pressure Treated Lumber Footing(2"x 6"). <br /> Dear Norris, <br /> At the request of Comerstone Foundation System LLC, Pacific Northwest Engineering has reviewed 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 Pre-cast Concrete PC-48 Footing(16"x 48"x 2 <br /> 'Al, Pre-cast Concrete Masonry Unit Footing (CMU 16" x 16" x 4"), Composite Board Footing (1 '/," x 6") or <br /> Pressure Treated Lumber Footing (2" x 6") when used in conjunction with Cornerstone Foundation System is <br /> acceptable as a tie down, perimeter pier and permanent foundation system, with a lateral and vertical force <br /> resisting system for wind zones I, II, and IN with a "C"exposure and a seismic design category"DIP', Ss=1.384, <br /> Fa=l.0, R=5 lateral load. In addition, an 80161 Sq. Ft. roof load and up to a 30" lateral soil loads may be resisted <br /> simultaneously. SFRB-54, SFS-60, and SFLS-60 also meet or exceed the design requirements of"poured in place" <br /> or "poured concrete runners" type foundation from the "Permanent Foundation Guidebook for manufactured <br /> housing"4145.1 Rev. 2 and 4150.1 Rev(1996) and also with the manufacturer pier point layout.The installation <br /> also meets or exceeds the design requirements of the FIUD 7584 Handbook. This allows the SFRB-54, SFLS-60 <br /> and SFS-60 to meet foundation certification for all HUD, FHA and VA lending on Manufactured Housing <br /> provided that the SFRB-54, SFLS-60 and SFS-60 installation instructions arc followed. It also meets or exceeds <br /> the requirements of Section 1333, Chapter 2, Title 25 of the California Administrative Code and 18551 of the <br /> Health and Safety Code. Cornerstone Foundation System meets or exceeds the Oregon 2010 Manufactured <br /> Dwelling Installation Specialty Code and the Model Manufactured Housing Installation Standards, Cornerstone <br /> Foundation System can also be used in flood hazard areas except with composite board or pressure treated lumber <br /> footing which allows up to 40 lbs. roof load and 24"soil hack fill. <br /> Test results and engineering calculations are available to authorities having jurisdiction when requested. <br /> Additional Information:Norrisa <br /> Contact Person.Foundation <br /> System f' <br /> Cornerstone Foundation System LLC' »' ' <br /> Phone:(541) 733.5441 ' <br /> Email: comerstonefoundationsystem yahoo.corn <br /> c ➢t1:aILINC c0eYe9Slnnla pMf <br /> 411/0 <br /> 4242 Silver Falls Dr,N.,Silverton, OR.97381 <br /> ph# (503) 873-3184 fax # (503) 873-39(17 <br /> P.E.# 13,676 <br /> Page 4 <br />