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• „iC c NoRritty, thw 'iNrlKINL, PACIFIC NoR TIIWESI ENGINEERING, INC'. Cornerstone Foundation System LLC July 13,2018 140 Art Mill Lane Roseburg, OR 97471 PATENT No. IJS 9,109,355 B I • Re: Design Criteria Verification "Smart Foundation" Running Bond 54 (SFRB-54), Ledge Stone 60 (SFLS-60), Smooth 60 (SFS- 60), and "Poured in Place" Footing or "Poured Concrete Runners", Pre-cast Concrete PC'-48 • Footing (16" x 48" x 2 'A"), Pre-cast Concrete Masonry Unit Footing (CMU [6" x 16" x 4"), • Composite Board Footing(I 'l" x 6') or Pressure Treated Lumher Footing(2" x 6"). • Dear Norris, At the request of Cornerstone Funoclat on System LI.C, Pacific Northwest Engineering has reviewed the empirical testing performed by Cornerstone Foundation System as witnessed and documented by Umpqua Testing Services. It is lily conclusion the test results and calculations prove that the"Smart Foundation" Running Bond 54 (SFRB-54), Ledge Stone 60 (SFLS-60).Smooth 60(SFS-60),and Pre-cast Concrete PC-48 Footing(16" x 4R'-x 2 A') Precast Concrete Masonry Unit Footing (CMU 16' x 16" x 4), Composite Board Footing (I ;;" x 6'') or Pressure Treated I Annber Footing (2" x 6') when used in conjunction with Cornerstone Foundation System is acceptable as a lie down, perimeter pier and permanent foundation system, with a lateral and vertical force resisting system for wind zones 1, II, and III with a --C'' exposure and a seismic design category "DIE', Ss=1 384. Fa=I.0 12 - lateral load In addition, an 8016/ Sq. Ft roof load and up to a 30 lateral soil loads may be resisted simultaneously. SFRB s4 SFS 60, and SETS-60 also meet or exceed the design requirements of"poured in place' or "poured concrete runners" type foundation from the "Permanent Foundation Guidebook for naanuacturel Housing'4145.1 Rev. 2 and 4150.1 Rev(I 996) and also with the menu faeunre, pier point layout. The installation also meets or exceeds the design requirements of the HUD 7584 Handbook. This allows the SF'12R-54, SFLS-60 and SES-ba to meet foundation certification for all 1-IUD. FHA and VA lending on M anti ihctured Iionsim_ provided that the SFRB-54, SFLS-60 and SFS-60 installation instructions are followed. It also meets or exceeds the requirements of Section 1333, Chapter 2, Title 25 of the California Adn,inistrative Code and IS551 of the Health and Safety Code. Cornerstone Foundation System meets or exceeds the Oregon 2010 Manufactured Dwelling Installation Specialty Code and the Model Manufactured Housing Installation Standards. Cornerstone Foundation System can also be used in flood hazard areas except with composite hoard or pressure treated lumber fnothag which allows up to 4(I lbs. root'load and 24"soil back till. 'Pest results and engineering calculations are available to authorities having jurisdiction when requested- rICIflA Additional Information: Contact Person: Nonisa Ahlgren • Cornerstone Foundation System TLC" Phone: (541) 733-5441 - Email: Cornersmnefoundatioilsysrem 2i yahoo.corn • 41111, 4242 Silver Falls Ur. N., SilvmYon, OR. 97381 ph # (5113) 873-3184 fax # (503)873-39117 l'.E. # 13.676 Page 4