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<br /> <br />July 30, 2014 <br />Neil Erickson <br />Hawaii County Public Works Building Division <br />Aupini Center, 101 Pauahi Street, Suite 7 <br />Hilo, HI 96720 <br />Re: Engineering Certification for the Mounting Systems, Inc. 13/52 Rail Span Chart <br />Dear Mr. Erickson, <br />This letter is to document that I have reviewed the Mounting Systems, Inc. 13/52 rail span chart and I have <br />found that it is in compliance with the requirements for the wind and seismic design for Hawaii County. These <br />requirements are acceptable up to a seismic design category E or less. <br />The effective wind pressure in Hawaii County is governed by a topographic factor, Kzt, a directionality factor, <br />Kd, a wind exposure and a wind speed. The topographic factor, Kzt is assumed to be 1.0 for the most general <br />case. The directionality factor, Kd is 0.85. The wind exposure category is B, C or D. Wind speed varies from 85 <br />mph to 160 mph. <br />This Certification is for gable roof and hipped roof structures with height up to 30 feet and roof angle between 7 <br />degree and 27 degree flush mount installations in 3 roof zones. <br />All systems where the panels are tilted up, and the systems that falls outside the above wind parameters, will <br />require engineering by a licensed Hawaii Structural engineer. <br />Following are typical specifications for the connections to meet the Hawaii County requirements: <br />Attachment Spacing: Mounting Systems, Inc. strongly recommends a maximum span of 8 feet, but in <br />any case, not to exceed the maximum span indicated on the charts. <br />Cantilever: <br />Tables <br />Clearance: m top of roof to bottom of PV panel <br />Roof Connection: <br />Standing Seam Roof: <br />1. ASGU2AL clamp of <br />screws. <br />2. Corrugated Bracket of EcoFasten Solar with #12 x . <br /> <br /> <br />1 of 6 <br /> <br />