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`vtc Hors Inv <br /> C Gt Fr, <br /> xrrinso PACIFIC I\ ORTIIN EST ENGINEERING, INC. <br /> 4 Cornerstone Foundation System LTC July 13, 2018 <br /> 140 Art Mill Lane <br /> Roseburg, OR 97471 <br /> PATENT No, US 9,109,355 BI <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 Yr), Pre-cast Concrete Masonry Unit Footing (CMU 16" x 16" x 4"), <br /> Composite Board Footing( I 11"x 6") or Pressure Treated Lumber Footing (2" x 6"). <br /> Dear Norris. <br /> Al the request of Cornerstone Foundation System LIC, 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 Ihal the"Sman Foundation" Running Bond 54 <br /> (SITt13-54), Ledge Stone 60 ISFLS-60), Smooth 60 (SFS-60), and Pre-cast Concrete PC'-48 Footing (167 .x 4S-' x 2 <br /> 1'2"), Pre-cast Concrete Masonry Unit Footing (CMU 16" x 16" x 4"), Composite Board Footing (1 '4" 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 III with a 'C" exposure and a seismic design category "Dll". Ss=I.384. <br /> Fa=1.0, R=5 lateral load. In addition, an 801b./ Sq. Ft. roof load and up to a 30" lateral soil loads may be resisted <br /> simultaneously. SFRI3-54, 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 HUD 7584 Handbook. This allows the SFRB-54. SETS-60 <br /> and SFS-60 to meet foundation ceni lication for all HUD. FIFA and VA lending on Manufactured Housing <br /> provided that the SFRB-54. SFLS-60 and SFS-60 installation instructions are Ibilowed. 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 back fill. <br /> Tut results and engineering calculations are available to authorities having jurisdiction when requested. <br /> Additional a Foundation <br /> Information: <br /> Contact Person: Norrisa Ahigren <br /> Cornerstone Foundation System LLC" � <br /> Phone: (541) 733-5441 <br /> Email: comerstonefoundationsysten46yahoo.eom <br /> , soNUW1,m,, NKs '' <br /> 4242 Silver Falls Dr. N., Silverton, OR. 97381 <br /> ph # (503) 873-3184 fax # (5113) 873-3907 <br /> P.E. # 13,676 <br /> Page 4 <br />