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HomeMy WebLinkAboutVivint Mounting Systems Inc 1352 Cert Letter_BlackLineSignature (2) July 30, 2014 Neil Erickson Hawaii County Public Works – Building Division Aupini Center, 101 Pauahi Street, Suite 7 Hilo, HI 96720 Re: Engineering Certification for the Mounting Systems, Inc. 13/52 Rail Span Chart Dear Mr. Erickson, This letter is to document that I have reviewed the Mounting Systems, Inc. 13/52 rail span chart and I have found that it is in compliance with the requirements for the wind and seismic design for Hawaii County. These requirements are acceptable up to a seismic design category E or less. The effective wind pressure in Hawaii County is governed by a topographic factor, Kzt, a directionality factor, Kd, a wind exposure and a wind speed. The topographic factor, Kzt is assumed to be 1.0 for the most general case. The directionality factor, Kd is 0.85. The wind exposure category is B, C or D. Wind speed varies from 85 mph to 160 mph. This Certification is for gable roof and hipped roof structures with height up to 30 feet and roof angle between 7 degree and 27 degree flush mount installations in 3 roof zones. All systems where the panels are tilted up, and the systems that falls outside the above wind parameters, will require engineering by a licensed Hawaii Structural engineer. Following are typical specifications for the connections to meet the Hawaii County requirements: Attachment Spacing: Mounting Systems, Inc. strongly recommends a maximum span of 8 feet, but in any case, not to exceed the maximum span indicated on the charts. Cantilever: Maximum cantilever length is L/3, where “L” is the span noted in the Span Chart Tables Clearance: 2” to 10” clear from top of roof to bottom of PV panel Roof Connection: Standing Seam Roof: 1. ASGU2AL clamp of Alpine SnowGuard with 3/8” stainless steel socket set screws. 2. Corrugated Bracket of EcoFasten Solar with #12 x 1 ½” roofing screws. 1 of 6 Composition Shingle Roof: 1. GreenFaste GF1 of EcoFasten Solar(UER-0216) with 5/16” lag bolt. Tile Roof: 1. Tile Flashing System of EcoFasten Solar with 5/16” hex head lag screw. Corrugated Metal Roof: 1. CorruSlide System of EcoFasten Solar with 1/4”-14x7/8” blazer Flange VRT screws. This letter is to certify the mounting structures and roof attachment to the existing structural members. The requirements of the overall structure need to be in compliance with the following codes: 1. Minimum Design Loads for Building and other Structures, ASCE/SEI 7-05 2. 2006 International Building Code, by International Code Council, Inc. 3. 2005 Aluminum Design Manual, by The Aluminum Association 4. AC428, Acceptance Criteria for Modular Framing Systems Used to support Photovoltaic (PV) Panels, November 1 2012 by ICC-ES 5. Guidelines for Permitting a Residential Photovoltaic (PV) Roof Mounted System, January 1 2013 by County of Hawaii If the roof structure or any other structural component of the mounting structure do not meet with the requirement above, then the installation need to be analyzed and designed by a licensed Hawaii structural engineer. If you have any questions on the above, do not hesitate to call. Sincerely, Paul Zacher, SE - President 2 of 6 0 psf 10 psf 20 psf 30 psf 40 psf 50 psf 60 psf 70 psf 80 psf 90 psf 85 10.0 8.5 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 100 10.0 8.5 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 110 9.5 8.5 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 120 9.0 8.5 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 130 8.0 8.0 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 140 7.5 7.5 6.5 6.0 5.5 5.0 4.5 4.0 4.0 3.5 150 7.0 7.0 6.5 6.0 5.5 5.0 4.5 4.0 4.0 3.5 160 7.0 7.0 6.5 6.0 5.5 5.0 4.5 4.0 4.0 3.5 0 psf 10 psf 20 psf 30 psf 40 psf 50 psf 60 psf 70 psf 80 psf 90 psf 85 9.5 8.5 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 100 9.0 8.5 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 110 8.0 8.0 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 120 7.5 7.5 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 130 7.0 7.0 6.5 6.0 5.5 5.0 4.5 4.0 4.0 3.5 140 6.5 6.5 6.5 5.5 5.0 5.0 4.5 4.0 4.0 3.5 150 6.0 6.0 6.0 5.5 5.0 5.0 4.5 4.0 4.0 3.5 160 6.0 6.0 6.0 5.5 5.0 4.5 4.5 4.0 4.0 3.5 0 psf 10 psf 20 psf 30 psf 40 psf 50 psf 60 psf 70 psf 80 psf 90 psf 85 9.0 8.5 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 100 8.5 8.0 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 110 7.5 7.5 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 120 7.0 7.0 6.5 6.0 5.5 5.0 4.5 4.0 4.0 3.5 130 6.5 6.5 6.5 6.0 5.5 5.0 4.5 4.0 4.0 3.5 140 6.0 6.0 6.0 5.5 5.0 4.5 4.5 4.0 4.0 3.5 150 5.5 5.5 5.5 5.5 5.0 4.5 4.5 4.0 4.0 3.5 160 5.5 5.5 5.5 5.5 5.0 4.5 4.5 4.0 4.0 3.5 a.The table above ONLY includes 13-52 rail capacity check. It does not include roof capacity check b.Wind Importance Factor =1.0 per ASCE 7-05 c.Topographic factor, kzt is 1.0 d.Maximum mean roof height is 30 ft. e.Average parapet height is 0 ft f.Roof pitch is between 7 degree and 27 degree g.Maximum solar panel weight is 60 lbs h.Height of solar panel is between 2" and 10" to roof i.Deflection criteria of L/60 per AC428 Section 4.3 j.The wind speeds above are ASD values k. l.The span length applies to a seismic design category E or less m.Maximum cantilever is L/3 13/52 Rail Zone 1 Span Chart Exposure Wind Speed Ground Snow Load Category B Exposure Wind Speed Ground Snow Load Exposure Wind Speed Ground Snow Load Category C Category D Mounting Systems, Inc. strongly recommends a maximum span of 8 feet, but in any case, not to exceed the maximum span indicated on the chart 3 of 6 0 psf 10 psf 20 psf 30 psf 40 psf 50 psf 60 psf 70 psf 80 psf 90 psf 85 8.5 8.0 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 100 7.5 7.5 7.0 6.0 5.5 5.0 4.5 4.0 4.0 3.5 110 7.0 7.0 6.5 6.0 5.5 5.0 4.5 4.0 4.0 3.5 120 6.5 6.5 6.5 5.5 5.0 5.0 4.5 4.0 4.0 3.5 130 6.0 6.0 6.0 5.5 5.0 4.5 4.5 4.0 4.0 3.5 140 5.5 5.5 5.5 5.5 5.0 4.5 4.5 4.0 4.0 3.5 150 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 160 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 0 psf 10 psf 20 psf 30 psf 40 psf 50 psf 60 psf 70 psf 80 psf 90 psf 85 7.5 7.5 6.5 6.0 5.5 5.0 4.5 4.0 4.0 3.5 100 6.5 6.5 6.5 6.0 5.5 5.0 4.5 4.0 4.0 3.5 110 6.0 6.0 6.0 5.5 5.0 4.5 4.5 4.0 4.0 3.5 120 5.5 5.5 5.5 5.5 5.0 4.5 4.5 4.0 4.0 3.5 130 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 140 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 150 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.0 4.0 3.5 160 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.0 4.0 3.5 0 psf 10 psf 20 psf 30 psf 40 psf 50 psf 60 psf 70 psf 80 psf 90 psf 85 6.5 6.5 6.5 6.0 5.5 5.0 4.5 4.0 4.0 3.5 100 6.0 6.0 6.0 5.5 5.0 4.5 4.5 4.0 4.0 3.5 110 5.5 5.5 5.5 5.5 5.0 4.5 4.5 4.0 4.0 3.5 120 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 130 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 140 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.0 4.0 3.5 150 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 3.5 160 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 3.5 a.The table above ONLY includes 13-52 rail capacity check. It does not include roof capacity check b.Wind Importance Factor =1.0 per ASCE 7-05 c.Topographic factor, kzt is 1.0 d.Maximum mean roof height is 30 ft. e.Average parapet height is 0 ft f.Roof pitch is between 7 degree and 27 degree g.Maximum solar panel weight is 60 lbs h.Height of solar panel is between 2" and 10" to roof i.Deflection criteria of L/60 per AC428 Section 4.3 j.The wind speeds above are ASD values k. l.The span length applies to a seismic design category E or less m.Maximum cantilever is L/3 Category B Category C Category D Exposure Wind Speed Ground Snow Load 13/52 Rail Zone 2 Span Chart Exposure Wind Speed Ground Snow Load Exposure Wind Speed Ground Snow Load Mounting Systems, Inc. strongly recommends a maximum span of 8 feet, but in any case, not to exceed the maximum span indicated on the chart 4 of 6 0 psf 10 psf 20 psf 30 psf 40 psf 50 psf 60 psf 70 psf 80 psf 90 psf 85 6.5 6.5 6.5 6.0 5.5 5.0 4.5 4.0 4.0 3.5 100 6.0 6.0 6.0 5.5 5.0 4.5 4.5 4.0 4.0 3.5 110 5.5 5.5 5.5 5.5 5.0 4.5 4.5 4.0 4.0 3.5 120 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 130 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 140 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.0 4.0 3.5 150 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 3.5 160 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 3.5 0 psf 10 psf 20 psf 30 psf 40 psf 50 psf 60 psf 70 psf 80 psf 90 psf 85 5.5 5.5 5.5 5.5 5.0 4.5 4.5 4.0 4.0 3.5 100 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 110 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 120 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.0 4.0 3.5 130 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 3.5 140 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 3.5 150 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 160 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 0 psf 10 psf 20 psf 30 psf 40 psf 50 psf 60 psf 70 psf 80 psf 90 psf 85 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 100 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.0 4.0 3.5 110 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.0 4.0 3.5 120 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 3.5 130 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 3.5 140 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 150 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 160 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 a.The table above ONLY includes 13-52 rail capacity check. It does not include roof capacity check b.Wind Importance Factor =1.0 per ASCE 7-05 c.Topographic factor, kzt is 1.0 d.Maximum mean roof height is 30 ft. e.Average parapet height is 0 ft f.Roof pitch is between 7 degree and 27 degree g.Maximum solar panel weight is 60 lbs h.Height of solar panel is between 2" and 10" to roof i.Deflection criteria of L/60 per AC428 Section 4.3 j.The wind speeds above are ASD values k. l.The span length applies to a seismic design category E or less m.Maximum cantilever is L/3 Category D Category C Category B Wind Speed Ground Snow Load Wind Speed Ground Snow Load Mounting Systems, Inc. strongly recommends a maximum span of 8 feet, but in any case, not to exceed the maximum span indicated on the chart Exposure Wind Speed Ground Snow Load Exposure 13/52 Rail Zone 3 Span Chart Exposure 5 of 6 Rail Span (ft)70 80 90 100 110 130 150 170 200 240 300 380 480 650 900 3.0 13/52 Rail 3.5 13/52 Rail 4.0 13/52 Rail 4.5 13/52 Rail 5.0 13/52 Rail 5.5 13/52 Rail 6.0 13/52 Rail 6.5 13/52 Rail 7.0 13/52 Rail 7.5 13/52 Rail 8.0 13/52 Rail 8.5 13/52 Rail 9.0 13/52 Rail 9.5 13/52 Rail 10.0 13/52 Rail 13/52 Rail Span (ft) 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 651 598 533 444 402 1101 960 838 756 690 LRFD Allowable Uplift Force (lb) 1764 1480 1243 13/52 Rail LRFD Allowable Uplift Wind Force (plf) 510 480 6 of 6