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HomeMy WebLinkAbout26-A105 7 Linnell Lane V2sunrun MA -TOWN YARMOUTH SEP 2 i 7()26 Morales Residence Old Kind's Highway 7 Linnell Ln Yarmouth MA USA 02675 Historic District The following revisions have been made to the plans: 1. Modules were relocated to another roof. 2. ESS was changed from Franklin to Powerwall 3 Revisions can be found on the following sheets: 1. PV-1.0 2. PV-2.0 3. PV-2.1 4. PV-3.0 5. PV-4.0 6. PV-5.0 7. PV-5.1 PARFAIT MPANO PV Designer Sunrun 2 6 - Al 05 A �W � =off g N w Ir Wf qqq o O Z q Y W W N—} rah tpy N Ix Lu z W}� $ � W 3 ^a �0.Z n a uj z S U R �~2Zn 2 w C k w m W N— o�" w a w > t9 a i UOro F 4 a N wig Ld LU L O f�; w www.' N 4 Q O J N IW C 6= ¢ z�00z0o w p � w.=z W z W Q d a } p y W V y it 0i Z N4 �` a U'wr. 0a Q� W NZ US Cc, j +r O Oaf m� _ �_ N 3 o40LL �w Z W pN = L E m U a O 6 W DO w W Z O ya �a W Z j coI ma �� a w d LLO U 0 a? 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A structural load evaluation has been completed which compares the loads before and after the panel installation. For this structure, the calculated maximum roof load after PV panel installation is less than the gravity and lateral load analysis triggers as set forth in the IESC. Based on an exterior inspection, this structure is performing adequately under the current loading. Prior to installation of the solar PV system, a Sunrun representative will confirm that the attic roof framing has no unsafe or dangerous conditions present. Any localized items requiring repair will be addressed as a part of the installation by the installing contractor and prior to installation. Structural evaluation of the loading is based on the applicable design criteria listed below. Design Criteria: • MA 10TH ED. CMR 780 (2021 IBC/IEBC), 7-16 ASCE & 2018 NDS • Basic (Category II) Wind Speed V=131 mph, Exposure C • Ground Snow Load = 30 psf, Min Flat Roof Snow Load = 25 psf Based on this evaluation, I certify that the alteration to the existing structure by installation of the PV system meets the requirements of the applicable existing building code provisions adopted/referenced above. Additionally, the PV module assembly and hardware supporting it have been designed according to manufacturer's specifications per the loading criteria referenced above. Installer shall inspect the existing roof framing to verify it is in suitable condition and does not exhibit signs of damage which may diminish the capacity of its members or connections. If damage exists, the installer shall notify the engineer of record prior for guidance to proceeding with installation. Results Summary Hardware Check Includes Uplift Check on Attachment5lFastener, Structure Check Considers Main Structure Orientation Attachment Spacing/Cantilever Configuration Max DCR Result Landscape 40.16 Staggered 86% Pass AR-01 Portrait 22 r 6 Staggered 85% Pass Roofing Material Pitch Structure Check Comp Shingle 27' Pass 225 Bush St. Suite 1400 San Francisco, CA 94104 SEP 7 3 701h Old King s Highway Histodc District t 26- Al 05