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• <br /> fix-C NOR❑fq, <br /> Cf. <br /> 1"0HaINu x� PACIFIC 1 rOR IIIWI 'ii' ENGINEERING,INC, <br /> Cornerstone Foundation System LLC February 18. 2020 <br /> 140 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 51"), Pre-cast Concrete Masonry Unit Footing (CM U 16" x 16" x 4"). <br /> Composite Board Footing(1 '%"x 6")or Pressure Treated Lumber Footing(2" x 6"). <br /> Dear Norris, <br /> At the request of Cornerstone 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 /> (SFR13-54), Ledge Stone 60 (SFLS-60), Smooth 60 (SFS-60), and Pre-cast Concrete PC-48 Footing (t6" x 48" x 2 <br /> ") Pre-cast Concrete Masonry Unit Footing (CAW 16' x 16" x 4"), Composite Board Footing (1 .5" x 6") or <br /> Pressure Treated lumber Footing (2" x 6") when used in conjunction with Cornerstone Foundation System is <br /> acceptable as a lateral and vertical force resisting system for wind zones 1, I1, and 111 with a "C" exposure and a <br /> seismic design category"DII'', Ss-1 384, Fa=I 0, R=5 lateral loud. In addition, an 80lb./Sq. Ft. roof load and up to a <br /> 30" lateral soil loads may be resisted simultaneously. SERBI-54, MIS-60,and SITS-60 also meet or exceed the design <br /> ( requirements of "poured in place" or "poured concrete runners' type foundation from the "Permanent Foundation <br /> �r Guidebook for manufactured [lousing' 4145.1 Rev. 2 and 4150 I 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, 19IA and VA lending on <br /> Manufactured Housing provided that the SFRB-54, SFLS-60 and SITS-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 /> Manutactured 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 Ibs roof load and 24"soil back fill. <br /> 'Pest results and engineering calculations are available to authorities having jurisdiction when requested. <br /> Mark Ellingson, PE - - <br /> A <br /> Contact <br /> son: Nation: ? ,N 1 �., �'�; y�7 <br /> Cunt tU Person: Norris Strnrnh I 1 <br /> Cornerstone Foundation System LLC ?, — <br /> Phone: (541) 733 5441 <br /> Email: cornerstonefoundationsystent(tdyahoa.com <br /> ON ftR°UL .tit uKA R..lomhi(Mx' <br /> 4ky 4242 Silver Falls Dr. N.,Silverton,OR. 97381 <br /> ph # (503) 873-3184 Fax # (503) N73-3907 <br /> RE. # 13,676 <br /> Page 5 of 13 <br />