HomeMy WebLinkAboutWanee, Alex Structural Letter 06.10.2020152 S. Broad St.
Lansdale, PA 19446
(215)361-8040
June 10, 2020
PowerHome Solar919 N. Main StMooresville, NC 28115
RE:Wanee Residence934 Preston Drive, Indianapolis , IN 46280
Client Project #: 934WANE
PFE Project #: 202352
On behalf of PowerHome Solar, Penn Fusion Engineering LLC (PFE) performed a structural analysis of the roof at the abovereferenced location. The purpose of our analysis was to determine if the existing roof system is structurally sufficient tosupport the new photovoltaic modules in addition to the code required design loads. Our analysis is based on the informationprovided by PowerHome Solar and is isolated only to the areas where the modules are intended to be placed.
System Specifications:Panel Specs: (21) Silfab - SILRacking System: Quick Mount PV - QRail Light
The modules are to be located on the following roof planes:
Mounting
Plane
Rafter
Size
Rafter
Spacing
Horizontal
Span
Collar
Ties
Collar Tie
Spacing Sheathing Shingle
Type
Number of
Shingle Layers
Ceiling
Profile
1 Truss 24"33ft. 0in.N/A 0"CDX 1/2"AsphaltShingles 1 Flat
2 2x6 16"14ft. 6in.N/A 0"CDX 1/2"AsphaltShingles 1 Flat
3 2x6 16"14ft. 6in.N/A 0"CDX 1/2"AsphaltShingles 1 Flat
The roof design has been analyzed in accordance with the 2005 Indiana Residential Code (2003 International ResidentialCode) with design loads as follows:
Ground Snow (Pg): 20 psfWind Speed (V): 115 mph
Mounting Plane 1It has been determined by this office that the roof, as specified above, is adequate to support the new PV modules in additionto the code required design loading.
Attach the module rail brackets to the roof with 5/16" lag bolts at 48 on center maximum with staggered penetration suchthat load is distributed evenly among roof members. Provide a minimum of 2" of penetration into the wood members.
Mounting Plane 2It has been determined by this office that the roof, as specified above, is adequate to support the new PV modules in additionto the code required design loading.
Attach the module rail brackets to the roof with 5/16" lag bolts at 48 on center maximum with staggered penetration suchthat load is distributed evenly among roof members. Provide a minimum of 2" of penetration into the wood members.
Mounting Plane 3It has been determined by this office that the roof, as specified above, is adequate to support the new PV modules in additionto the code required design loading.
Attach the module rail brackets to the roof with 5/16" lag bolts at 48 on center maximum with staggered penetration suchthat load is distributed evenly among roof members. Provide a minimum of 2" of penetration into the wood members.
This office has determined that the installation of the PV System as specified above will meet the structural requirements ofthe 2005 Indiana Residential Code when installed in accordance with the manufacture's instructions.
If you have any questions regarding this analysis, please feel free to contact us.
Best Regards,
Penn Fusion Engineering LLC
Andrew D. Leone, P.E.Principal