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768 VECUNA RD SOLR23-0004 Structural Letter REV-A 2-27-24Patented. Copyright © 2020-2024 Richard Pantel. All Rights Reserved. Paper or PDF copies of this report may be distributed only to employees of the company listed below under "Prepared for", or to Authorities Having Jursidiction (AHJ's) for their review purposes. This document contains Intellectual Property (IP) created by the Author, and as such, no parts of this calculation report or related data input form(s) may be copied in format, content or intent without permission in writing from the Author. Dis-assembly or reverse engineering of this calculation report or related data input form is strictly prohibited. The Author's contact information is: RPantel@iroofa.solar, web-site: www.iroofa.solar; tel: 908-507-5500. Trademark: iRooF® and iRooFA®. Instant Roof Framing Analysis www.iroofa.solar tel: 540.313.5317 - email: info@iRooFA.solar STRUCTURAL ANALYSIS for the ROOFTOP PV SOLAR INSTALLATION Project: Adam Mcquiston, 768 Vecuna Road, Atlantic Beach, FL 32233 Prepared for: Sunergy 7625 Little Rd Ste 200a - New Port Richey, FL 34654 Calculation Report Index Pages Description Pages Description 1 Cover 2-4 Loading Summary Roof Structural Calculations for PV Solar Installation Roof Structural Calculations for PV Solar Installation 5-9 Location: MP 1 10-14 Location: MP 2 15-19 Location: MP 3 20-24 Location: MP 4 25-25 Snow Loading Calculations 26-33 Truss FEA Calculations Project Number: 66.2921.1, Rev. 0 Report Date: 01/25/2024 Report Prepared by: Richard Pantel, P.E. FL License No. 73222 Sealed 01/25/2024 V240117 ID.L1W7 This item has been digitally signed and sealed by Richard Pantel, P.E. on the date adjacent to the seal. Printed copies of this document are not considered signed and sealed and the signature must be verified on any electronic copies. Cover iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.1 of 25 Loading Summary Exposure and Occupancy Categories B II Wind Loading: v 129 mph ASCE 7-22, Figure 26.5-1 A, B or C [(129 mph, 50 year wind MRI)] qz 25.25 psf pg 4.00659 psf Ground Snow Load pg (ASCE 7-22 Table 7.2-1, Page 56-60) Total Snow Load ps 4.01 psf mm ft in 1,722 5.65 67.80 1,134 3.72 44.65 2.0 21.02 kg lb 20.70 45.64 Roof Panel (Cladding) Loading Summary Module Loading Summary Upward Upward Upward Downward 1 2 3 All lb -247 -372 -526 97 Positive values indicate net downward force Exposure Category (ASCE 7-22 Table 26.7.3, Page 274) Building Use Occupancy / Risk Category (ASCE 7-22 Table 1.5-1, Page 5) Snow Loading Velocity qz, calculated at height z [ASD] Effective snow load on roof and modules Module Data Mitrex: M405-I3H Dimensions Length Roof Zones Support Point Loads Width Area (m^2, ft^2) Net load per module Weight Module Loading Summary R iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.2 of 25 Stanchion Fastener Pull-out and Spacing Calculations ft 2.00 ea 2 ft 4.00 2 in 2 1.10 lb/in 103 lb 376 Fastener details Material Stainless Size M5 lb 400 lb 376 1 2 3 lb 247 372 526 Min tot screw thread embedment depth rq'd in 1.31 1.98 2.80 Net uplift pressure 7. 0.60D - 0.6W psf -10.93 -16.48 -23.28 sf 34.41 22.82 16.16 ft 4.00 4.00 4.00 ft 3.72 ft > 6 > 6 > 6 ft 4.00 4.00 4.00 sf 7.44 7.44 7.44 lb -81 -123 -173 ft 5.65 ft > 6 > 6 4.00 ft 4.00 4.00 4.00 sf 11.30 11.30 11.30 lb -124 -186 -263 Stanchion support threaded fastener sizes are indicated in the Module Loading Summary table above. Lift forces were determined from GCp and other coefficients contained in the ASCE nomographs Safety Factor Net lift per module Maximum module area / support point Factored lift per support point Allowable lift area / support point Landscape Modules Length along rafter Roof Zones Pull-out for M5 threaded fasteners Framing spacing Portrait Modules Length along rafter Max proposed stanchion span Rails / Module Max rail span per framing spacing Max stanchion EW spacing Max stanchion EW spacing # fasteners per stanchion Screw thread embedment depth Factored max fastener uplift capacity Lift calc'ed max stanchion EW spacing Maximum module area / support point Factored lift per support point Lift calc'ed max stanchion EW spacing Max stanchion uplift capacity Max support point uplift capacity Loading Summary R iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.3 of 25 Conclusions We were asked to review the roof of Adam Mcquiston, located at 768 Vecuna Road, Atlantic Beach, FL, by Sunergy, to determine its suitability to support a PV solar system installation. The referenced building's roof structure was field measured by Sunergy. The attached framing analyses reflect the results of those field measurements combined with the PV solar module locations shown on the PV solar roof layout design prepared by Sunergy. Loads are calculated to combine the existing building and environmental loads with the proposed new PV array loads. The K2-Systems CrossRail 44-X racking and K2-Systems Splice Foot XL w/2 bolts stanchions were selected for this project by Sunergy. The racking and support stanchions shall be placed as shown on their plans, dated 09/14/2023, and shall be fastened to the roof framing using fastener sizes indicated in this report. Rack support spacing shall be no more than that shown above. Note that support points for alternating rows shall share the same truss. Intermediate rows shall move the support points laterally to the next truss. 7-10 NE 03.jpg Google Location Map Framing Summary Based upon the attached calculations and in accordance with the FBC 2023 Section R324.4 and the FBC's reference to IBC 2021 Section 1607.12.5.2, the existing roofs' framing systems are capable of supporting the additional loading for the proposed PV solar system along with the existing building and environmental loads. No supplemental roof framing structural supports are required. Minimum required anchorage fastening is described above. Wood fastener notes: 1) Fastener threads must be embedded in the side grain of a roof support structural member or other structural member integrated into the building's structure. 2) Fastener must be located in the middle third of the structural member. 3) Install fasteners with head and where required, washer, flush to material surface (no gap). Do not over-torque. References and Codes: 1) ASCE 7-22 Minimum Design Loads for Buildings and Other Structures 2) IBC 2021 3) FBC 2023 5) American Wood Council, NDS 2018,Table 12.2A, 12.3.3A. 6) American Wood Council, Wood Structural Design, 1992, Figure 6. Loading Summary R iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.4 of 25 Roof Structural Calculations for PV Solar Installation Array AR-1 Location: MP 1 Member:Truss - Total Length 15 ft, Unsupported 15 ft deg.17.00 deg.0.00 ft.28.17 ft.15.00 ft.15.00 Roof Wind Zone Width use, a =3.00 ft Wind Velocity Pressure, q z evaluated at the height z qz=25.25 psf Vasd q z=15.23 psf Basic wind pressure V=129 mph Framing Data 2 # Rafters / Rack Support Width 1 4.00 Rack Support Spacing (ft) in 24.00 48 Max. Rack Support Spacing (in) ft 15.00 1 Max # of mod's / Top truss chord Member * Mem properties based upon field measurements (1) 2x4 Top truss chord 1.15 Uphill Dist Between Mounting Holes (ft) Module Physical Data kg lb psf load 20.70 45.64 2.17 1.27 2.8 0.13 Units Value Description psf 4.40 Truss members' self weight added to FEA analysis Rack Support Spacing and Loading ft 4.0 ft 5.6 sf 11.3 in 1.0 0.08 ft ft 15.00 ft 15.00 Along rafter slope Area / support point Maximum member free span Existing Dead Loads Top truss chord span Ө L W h White 0.12% Across rafters 4 Stanchions Uphill gap between modules Geometric Data Angle of roof plane from horizontal, in degrees Length of roof plane, in feet (meters) Plan view width of roof plane, in feet (meters) Average height of roof above grade, in feet (meters) Rafter / Truss OC Wood source, moisture content Wood type # Framing Members / Support US Spruce ω Angle the solar panel makes with the roof surface Roof Deck & Surface Repetitive Member Factor (Cr) Weight Member Total Length Member Properties Name Module Member Total Length Array AR-1 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.5 of 25 ASCE 7-22 Method for Calculating Uplift on PV Modules Notation Lp = Panel chord length. p = uplift wind pressure γa = Solar panel pressure equalization factor, defined in Fig. 29.4-8. γE = Array edge factor as defined in Section 29.4.4. θ = Angle of plane of roof from horizontal, in degrees. 29.4.4 Rooftop Solar Panels Parallel to the Roof Surface on Buildings of All Heights and Roof Slopes. Ө >= 7 deg TRUE Min.d1: Exposed FALSE Max.d1: Exposed TRUE Use EXPOSED for uplift calculations 1.5(Lp) = 5.58 γE = 1.5 γa = 0.67 p = qh(GCp) (γE) (γa) (lb ∕ft2) (29.4-7) Zones 1 2 3 p, Windload (psf)-25.71 -34.96 -46.29 Array AR-1 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.6 of 25 ASCE 7-22 Chapter 2 Combinations of Loads, Table 2.4, Page 8 (in psf) 1 2 3 1, 2 & 3 Module Upward Module Upward Module Upward Downward 2.30 2.30 2.30 2.30 4.01 4.01 4.01 4.01 -25.71 -34.96 -46.29 7.91 2.4 Combining Nominal Loads Using Allowable Stress Design (in psf) 2.4.1 Basic Combinations. Loads listed herein shall be considered to act in the following combinations; whichever produces the most unfavorable effect in the building, foundation, or structural member being considered. Effects of one or more loads not acting shall be considered. Upward Upward Upward Downward Use this loading combination for DOWNWARD for Proposed PV Dead Load 6.31 6.31 6.31 9.87 71 71 71 112 62 62 62 97 Use this loading combination for UPWARD for Proposed PV Dead Load -10.93 -16.48 -23.28 7.49 -124 -186 -263 85 DOWNWARD Presume loading directly over member. Combined Dead and Wind Pressure Downward Loading Top truss chord span W = wind load Cr Factored Module Support point load (lb) Module Support point load (lb) 6. D + 0.75L - 0.75(0.60W) + 0.75(Lr or S or R) 7. 0.60D - 0.6W S = snow load D = dead load of PV Module + Stanchion Module Support point load (lb) 2.2 SYMBOLS AND NOTATION Zones Combination Formulae Array AR-1 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.7 of 25 PV Module Row Point load loc's from Left support Point Load #'s Module Support Point Load Comment Module Orientation ft from left lb 1 0.67 97 Portrait 1 6.32 0 Support placed on adjoining truss Portrait Array AR-1 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.8 of 25 Truss Data and Loading for MP 1 17.00 Length of roof plane 15.00 Top ridge height above floor plane 4.39 Length of floor plane 14.33 Truss Segments Roof Plane Floor Plane Diagonals Diagonals Mem #Mem Type Mem #Mem Type Mem #Mem Type Mem #Mem Type 1 2x4 3 2x4 5 2x4 7 2x4 2 2x4 4 2x4 6 2x4 2x4 * Loading includes member self weight & roofing materials. w loading = wind & snow on exposed areas Truss Graphing Tools Roof slope (degrees) M1 M2 M3 M4 M5 M6 M7 P1 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0 2 4 6 8 10 12 14 Array AR-1 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.9 of 25 Roof Structural Calculations for PV Solar Installation Array AR-2 Location: MP 2 Member:Truss - Total Length 15 ft, Unsupported 15 ft deg.17.00 deg.0.00 ft.26.17 ft.15.00 ft.15.00 Roof Wind Zone Width use, a =3.00 ft Wind Velocity Pressure, q z evaluated at the height z qz=25.25 psf Vasd q z=15.23 psf Basic wind pressure V=129 mph Framing Data 2 # Rafters / Rack Support Width 1 4.00 Rack Support Spacing (ft) in 24.00 48 Max. Rack Support Spacing (in) ft 15.00 2 Max # of mod's / Top truss chord Member * Mem properties based upon field measurements (1) 2x4 Top truss chord 1.15 Uphill Dist Between Mounting Holes (ft) Module Physical Data kg lb psf load 20.70 45.64 2.17 1.27 2.8 0.13 Units Value Description psf 4.40 Truss members' self weight added to FEA analysis Rack Support Spacing and Loading ft 4.0 ft 5.6 sf 11.3 in 1.0 0.08 ft ft 15.00 ft 15.00 Member Total Length Maximum member free span Top truss chord span Across rafters Along rafter slope Area / support point Uphill gap between modules Roof Deck & Surface Weight Module 4 Stanchions Existing Dead Loads Member Total Length Member Properties Name Repetitive Member Factor (Cr) # Framing Members / Support Rafter / Truss OC Wood type US Spruce Wood source, moisture content White 0.12% W Plan view width of roof plane, in feet (meters) h Average height of roof above grade, in feet (meters) Geometric Data Ө Angle of roof plane from horizontal, in degrees ω Angle the solar panel makes with the roof surface L Length of roof plane, in feet (meters) Array AR-2 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.10 of 25 ASCE 7-22 Method for Calculating Uplift on PV Modules Notation Lp = Panel chord length. p = uplift wind pressure γa = Solar panel pressure equalization factor, defined in Fig. 29.4-8. γE = Array edge factor as defined in Section 29.4.4. θ = Angle of plane of roof from horizontal, in degrees. 29.4.4 Rooftop Solar Panels Parallel to the Roof Surface on Buildings of All Heights and Roof Slopes. Ө >= 7 deg TRUE Min.d1: Exposed FALSE Max.d1: Exposed TRUE Use EXPOSED for uplift calculations 1.5(Lp) = 5.58 γE = 1.5 γa = 0.67 p = qh(GCp) (γE) (γa) (lb ∕ft2) (29.4-7) Zones 1 2 3 p, Windload (psf)-25.71 -34.96 -46.29 Array AR-2 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.11 of 25 ASCE 7-22 Chapter 2 Combinations of Loads, Table 2.4, Page 8 (in psf) 1 2 3 1, 2 & 3 Module Upward Module Upward Module Upward Downward 2.30 2.30 2.30 2.30 4.01 4.01 4.01 4.01 -25.71 -34.96 -46.29 7.91 2.4 Combining Nominal Loads Using Allowable Stress Design (in psf) 2.4.1 Basic Combinations. Loads listed herein shall be considered to act in the following combinations; whichever produces the most unfavorable effect in the building, foundation, or structural member being considered. Effects of one or more loads not acting shall be considered. Upward Upward Upward Downward Use this loading combination for DOWNWARD for Proposed PV Dead Load 6.31 6.31 6.31 9.87 71 71 71 112 62 62 62 97 Use this loading combination for UPWARD for Proposed PV Dead Load -10.93 -16.48 -23.28 7.49 -124 -186 -263 85 DOWNWARD Presume loading directly over member. Combined Dead and Wind Pressure Downward Loading Top truss chord span 7. 0.60D - 0.6W Module Support point load (lb) Combination Formulae 6. D + 0.75L - 0.75(0.60W) + 0.75(Lr or S or R) Module Support point load (lb) Cr Factored Module Support point load (lb) W = wind load S = snow load 2.2 SYMBOLS AND NOTATION D = dead load of PV Module + Stanchion Zones Array AR-2 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.12 of 25 PV Module Row Point load loc's from Left support Point Load #'s Module Support Point Load Comment Module Orientation ft from left lb 1 0.67 97 Portrait 1 6.32 0 Support placed on adjoining truss Portrait 2 6.40 0 Support placed on adjoining truss Portrait 2 12.05 97 Portrait Array AR-2 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.13 of 25 Truss Data and Loading for MP 2 17.00 Length of roof plane 15.00 Top ridge height above floor plane 4.39 Length of floor plane 14.33 Truss Segments Roof Plane Floor Plane Diagonals Diagonals Mem #Mem Type Mem #Mem Type Mem #Mem Type Mem #Mem Type 1 2x4 3 2x4 5 2x4 7 2x4 2 2x4 4 2x4 6 2x4 2x4 * Loading includes member self weight & roofing materials. w loading = wind & snow on exposed areas Truss Graphing Tools Roof slope (degrees) M1 M2 M3 M4 M5 M6 M7 P1 P2 0 1 2 3 4 5 6 7 0 2 4 6 8 10 12 14 Array AR-2 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.14 of 25 Roof Structural Calculations for PV Solar Installation Array AR-3 Location: MP 3 Member:Truss - Total Length 15 ft, Unsupported 15 ft deg.17.00 deg.0.00 ft.32.33 ft.15.00 ft.15.00 Roof Wind Zone Width use, a =3.00 ft Wind Velocity Pressure, q z evaluated at the height z qz=25.25 psf Vasd q z=15.23 psf Basic wind pressure V=129 mph Framing Data 2 # Rafters / Rack Support Width 1 4.00 Rack Support Spacing (ft) in 24.00 48 Max. Rack Support Spacing (in) ft 15.00 2 Max # of mod's / Top truss chord Member * Mem properties based upon field measurements (1) 2x4 Top truss chord 1.15 Uphill Dist Between Mounting Holes (ft) Module Physical Data kg lb psf load 20.70 45.64 2.17 1.27 2.8 0.13 Units Value Description psf 4.40 Truss members' self weight added to FEA analysis Rack Support Spacing and Loading ft 4.0 ft 5.6 sf 11.3 in 1.0 0.08 ft ft 15.00 ft 15.00 Member Total Length Maximum member free span Top truss chord span Across rafters Along rafter slope Area / support point Uphill gap between modules Roof Deck & Surface Weight Module 4 Stanchions Existing Dead Loads Member Total Length Member Properties Name Repetitive Member Factor (Cr) # Framing Members / Support Rafter / Truss OC Wood type US Spruce Wood source, moisture content White 0.12% W Plan view width of roof plane, in feet (meters) h Average height of roof above grade, in feet (meters) Geometric Data Ө Angle of roof plane from horizontal, in degrees ω Angle the solar panel makes with the roof surface L Length of roof plane, in feet (meters) Array AR-3 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.15 of 25 ASCE 7-22 Method for Calculating Uplift on PV Modules Notation Lp = Panel chord length. p = uplift wind pressure γa = Solar panel pressure equalization factor, defined in Fig. 29.4-8. γE = Array edge factor as defined in Section 29.4.4. θ = Angle of plane of roof from horizontal, in degrees. 29.4.4 Rooftop Solar Panels Parallel to the Roof Surface on Buildings of All Heights and Roof Slopes. Ө >= 7 deg TRUE Min.d1: Exposed FALSE Max.d1: Exposed TRUE Use EXPOSED for uplift calculations 1.5(Lp) = 5.58 γE = 1.5 γa = 0.67 p = qh(GCp) (γE) (γa) (lb ∕ft2) (29.4-7) Zones 1 2 3 p, Windload (psf)-25.71 -34.96 -46.29 Array AR-3 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.16 of 25 ASCE 7-22 Chapter 2 Combinations of Loads, Table 2.4, Page 8 (in psf) 1 2 3 1, 2 & 3 Module Upward Module Upward Module Upward Downward 2.30 2.30 2.30 2.30 4.01 4.01 4.01 4.01 -25.71 -34.96 -46.29 7.91 2.4 Combining Nominal Loads Using Allowable Stress Design (in psf) 2.4.1 Basic Combinations. Loads listed herein shall be considered to act in the following combinations; whichever produces the most unfavorable effect in the building, foundation, or structural member being considered. Effects of one or more loads not acting shall be considered. Upward Upward Upward Downward Use this loading combination for DOWNWARD for Proposed PV Dead Load 6.31 6.31 6.31 9.87 71 71 71 112 62 62 62 97 Use this loading combination for UPWARD for Proposed PV Dead Load -10.93 -16.48 -23.28 7.49 -124 -186 -263 85 DOWNWARD Presume loading directly over member. Combined Dead and Wind Pressure Downward Loading Top truss chord span 7. 0.60D - 0.6W Module Support point load (lb) Combination Formulae 6. D + 0.75L - 0.75(0.60W) + 0.75(Lr or S or R) Module Support point load (lb) Cr Factored Module Support point load (lb) W = wind load S = snow load 2.2 SYMBOLS AND NOTATION D = dead load of PV Module + Stanchion Zones Array AR-3 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.17 of 25 PV Module Row Point load loc's from Left support Point Load #'s Module Support Point Load Comment Module Orientation ft from left lb 1 3.67 0 Support placed on adjoining truss Portrait 1 9.32 97 Portrait 2 9.40 97 Portrait 2 15.05 0 Support outside of max stressed section Portrait Array AR-3 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.18 of 25 Truss Data and Loading for MP 3 17.00 Length of roof plane 15.00 Top ridge height above floor plane 4.39 Length of floor plane 14.33 Truss Segments Roof Plane Floor Plane Diagonals Diagonals Mem #Mem Type Mem #Mem Type Mem #Mem Type Mem #Mem Type 1 2x4 3 2x4 5 2x4 7 2x4 2 2x4 4 2x4 6 2x4 2x4 * Loading includes member self weight & roofing materials. w loading = wind & snow on exposed areas Truss Graphing Tools Roof slope (degrees) M1 M2 M3 M4 M5 M6 M7 P1 P2 0 1 2 3 4 5 6 0 2 4 6 8 10 12 14 Array AR-3 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.19 of 25 Roof Structural Calculations for PV Solar Installation Array AR-4 Location: MP 4 Member:Truss - Total Length 15 ft, Unsupported 15 ft deg.17.00 deg.0.00 ft.48.33 ft.15.00 ft.15.00 Roof Wind Zone Width use, a =3.00 ft Wind Velocity Pressure, q z evaluated at the height z qz=25.25 psf Vasd q z=15.23 psf Basic wind pressure V=129 mph Framing Data 2 # Rafters / Rack Support Width 1 4.00 Rack Support Spacing (ft) in 24.00 48 Max. Rack Support Spacing (in) ft 15.00 2 Max # of mod's / Top truss chord Member * Mem properties based upon field measurements (1) 2x4 Top truss chord 1.15 Uphill Dist Between Mounting Holes (ft) Module Physical Data kg lb psf load 20.70 45.64 2.17 1.27 2.8 0.13 Units Value Description psf 4.40 Truss members' self weight added to FEA analysis Rack Support Spacing and Loading ft 4.0 ft 5.6 sf 11.3 in 1.0 0.08 ft ft 15.00 ft 15.00 Member Total Length Maximum member free span Top truss chord span Across rafters Along rafter slope Area / support point Uphill gap between modules Roof Deck & Surface Weight Module 4 Stanchions Existing Dead Loads Member Total Length Member Properties Name Repetitive Member Factor (Cr) # Framing Members / Support Rafter / Truss OC Wood type US Spruce Wood source, moisture content White 0.12% W Plan view width of roof plane, in feet (meters) h Average height of roof above grade, in feet (meters) Geometric Data Ө Angle of roof plane from horizontal, in degrees ω Angle the solar panel makes with the roof surface L Length of roof plane, in feet (meters) Array AR-4 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.20 of 25 ASCE 7-22 Method for Calculating Uplift on PV Modules Notation Lp = Panel chord length. p = uplift wind pressure γa = Solar panel pressure equalization factor, defined in Fig. 29.4-8. γE = Array edge factor as defined in Section 29.4.4. θ = Angle of plane of roof from horizontal, in degrees. 29.4.4 Rooftop Solar Panels Parallel to the Roof Surface on Buildings of All Heights and Roof Slopes. Ө >= 7 deg TRUE Min.d1: Exposed FALSE Max.d1: Exposed TRUE Use EXPOSED for uplift calculations 1.5(Lp) = 5.58 γE = 1.5 γa = 0.67 p = qh(GCp) (γE) (γa) (lb ∕ft2) (29.4-7) Zones 1 2 3 p, Windload (psf)-25.71 -34.96 -46.29 Array AR-4 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.21 of 25 ASCE 7-22 Chapter 2 Combinations of Loads, Table 2.4, Page 8 (in psf) 1 2 3 1, 2 & 3 Module Upward Module Upward Module Upward Downward 2.30 2.30 2.30 2.30 4.01 4.01 4.01 4.01 -25.71 -34.96 -46.29 7.91 2.4 Combining Nominal Loads Using Allowable Stress Design (in psf) 2.4.1 Basic Combinations. Loads listed herein shall be considered to act in the following combinations; whichever produces the most unfavorable effect in the building, foundation, or structural member being considered. Effects of one or more loads not acting shall be considered. Upward Upward Upward Downward Use this loading combination for DOWNWARD for Proposed PV Dead Load 6.31 6.31 6.31 9.87 71 71 71 112 62 62 62 97 Use this loading combination for UPWARD for Proposed PV Dead Load -10.93 -16.48 -23.28 7.49 -124 -186 -263 85 DOWNWARD Presume loading directly over member. Combined Dead and Wind Pressure Downward Loading Top truss chord span 7. 0.60D - 0.6W Module Support point load (lb) Combination Formulae 6. D + 0.75L - 0.75(0.60W) + 0.75(Lr or S or R) Module Support point load (lb) Cr Factored Module Support point load (lb) W = wind load S = snow load 2.2 SYMBOLS AND NOTATION D = dead load of PV Module + Stanchion Zones Array AR-4 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.22 of 25 PV Module Row Point load loc's from Left support Point Load #'s Module Support Point Load Comment Module Orientation ft from left lb 1 2.67 97 Portrait 1 8.32 0 Support placed on adjoining truss Portrait 2 8.40 0 Support placed on adjoining truss Portrait 2 14.05 97 Portrait Array AR-4 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.23 of 25 Truss Data and Loading for MP 4 17.00 Length of roof plane 15.00 Top ridge height above floor plane 4.39 Length of floor plane 14.33 Truss Segments Roof Plane Floor Plane Diagonals Diagonals Mem #Mem Type Mem #Mem Type Mem #Mem Type Mem #Mem Type 1 2x4 3 2x4 5 2x4 7 2x4 2 2x4 4 2x4 6 2x4 2x4 * Loading includes member self weight & roofing materials. w loading = wind & snow on exposed areas Truss Graphing Tools Roof slope (degrees) M1 M2 M3 M4 M5 M6 M7 P1 P2 0 1 2 3 4 5 6 7 0 2 4 6 8 10 12 14 Array AR-4 iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.24 of 25 Snow Loading Analysis where: Fully Exposed Exposure category Ce =0.9 Exposure Factor, Ce (ASCE 7-22 Table 7.3-1, Page 61) Ct =1.0 Thermal Factor, Ct (ASCE 7-22 Table 7.3-2, Page 61) Is =1.0 Snow Importance Factor, Is (ASCE 7-22 Table 1.5-2, Page 5) pg =4.0066 Ground Snow Load pg (ASCE 7-22 Table 7.2-1, Page 56-60) pf =0.7CeCtIsPg Flat Roof Snow Load, pf (ASCE 7-22 Table 7.3-1, Page 61) pf =2.5242 psf but where Pf is not less than the following: Minimum Snow Load pm (ASCE 7-22 Table 7.3.4, Page 62) pm =4.0066 When Pg <=20 psf, then use Pf = Pg x Is pf =4.0066 psf. Resultant Snow pressure to be used with Roof slope factor below ps =Cspf Sloped Roof Snow Load ps (ASCE 7-22 Table 7.4, Page 61) Roof Type Warm Roofs Roof slope factor Cs for Warm Roofs, where Ct = 1.0 Roof surface condition = Slippery Roof Cs =1.00 Roof Slope Factor, Cs (ASCE 7-22 Table 7.4-1a, Page 62) Total Snow Load ps =4.01 psf Roof snow load Snow Loading iRooFATM Copyright © 2020 Richard Pantel. All Rights Reserved.25 of 25