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STRUCTURAL ENGINEERS <br />January 20,2011 <br />UniRac <br />1411 Broadway Boulevard NE <br />Albuquerque, New Mexico 87102-1545 <br />TEL: (505) 242-6411 <br />FAX: (505) 242-6412 <br />l/0 / 1§11 <br />IU S3878 / # <br />4 81-13 1*#-- <br />44918* <br />Attn.: Engineering Department, <br />Re: Engineering Certification for UniRac's SolarMount Code-Complaint Installation Manual 227.3 <br />PZSE, Inc.-Structural Engineers has reviewed UniRac's "SolarMount Code-Complaint Installation Manual <br />227.3" published October 2010 and specifically "Part I. Procedure to Determine the Design Wind Load", and <br />"Part II: Procedure to Select Rail Span and Rail Type". <br />The procedures are used to determine the calculation of the design wind force, load combinations, applied <br />loading and rail selection. All information, data and analysis contained within the Installation Manual are based <br />on, and comply with the following: <br />1. 2009 Inteinational Building Code, by International Code Council, Inc., 2009 <br />2. 2010 California Building Code, by California Building Standards Commission, 2011 <br />3, Aluminum Design Manual: Specifications and Guidelines for Aluminum Structures, by The Aluminum <br />Association, 2005 <br />This letter certifies that the structural calculations contained within UniRac's "SolarMount Code-Complaint <br />Installation Manual 227.3 are in compliance with the above Codes. <br />If you have any questions on the above, do not hesitate to call. <br />Sincekly, <br />Paul cher, SE - President <br />8137 Sunset Avenue, Suite 120 • Fair Oaks, (A 95628 • 916.961.3960 + 916.961.3965 1 + WWW.P 5 .COM