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HomeMy WebLinkAboutLETTER - STRUCTURAL EVALUATION OF LOADING1/8 RE:CERTIFICATION LETTER Project Address: AGOSTINELLI RESIDENCE 5100 PINETREE DRIVE FORT PIERCE, FL 34982 Design Criteria: - Applicable Codes = 2020 FLBC/FLEBC 7th Edition, 2020 FLRC 7th Edition, 2018 IEBC/IBC, ASCE 7-16 and 2018 NDS - Risk Category = II - Wind Speed = 152 mph, Exposure Category C, Partially/Fully Enclosed Method - Ground Snow Load = 0 psf - ROOF 1 : 2 x 4 @ 24" OC, Roof DL = 6 psf, Roof LL/SL = 19 psf (Non-PV), Roof LL/SL = 0 psf (PV) - ROOF 2 : 2 x 4 @ 24" OC, Roof DL = 10 psf, Roof LL/SL = 20 psf (Non-PV), Roof LL/SL = 0 psf (PV) To Whom It May Concern, Sincerely, December 15, 2021 Yuri Yurianto, S.E., P.E. A structural evaluation of loading was conducted for the above address based on the design criteria listed above. Existing roof structural framing has been reviewed for additional loading due to installation of PV Solar System on the roof. The structural review applies to the sections of roof that is directly supporting the solar PV system. Based on this evaluation, I certify that the alteration to the existing structure by installation of the PV system meets the prescriptive compliance requirements of the applicable existing building and/or new building provisions adopted/referenced above. Additionally, the PV module assembly including attachment hardware has been reviewed to be in accordance with the manufacturer’s specifications and to meet and/or exceed the requirements set forth by the referenced codes. Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com By Yuri at 7:15:34 AM, 12/16/2021 2/8 ROOF 1 OK ROOF 2 OK ROOF ROOF 1 ROOF 2 STANDOFF HARDWARE EVAULATION FOR WIND UPLIFT UPLIFT DCR RESULT 73.6% 56.3% ROOF PITCH (deg.) 23° 2° RESULTS SUMMARYBARUN CORP AGOSTINELLI RESIDENCE, 5100 PINETREE DRIVE, FORT PIERCE, FL 34982 ROOF MOUNTING PLANE STRUCTURAL EVALUATION (BASED ON IEBC 5% IMPACT CHECK) Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com 3/8 PV module weight 2.5 psf Hardware assembly weight 0.5 psf PV-DL 3.00 psf Existing Roofing Material 1 layers 1.5 psf Underlayment 0.5 psf Plywood Sheathing 1.5 psf Framing Weight 2 x 4 @ 24 in. O.C.0.73 psf Vaulted ceiling No 0 psf Miscellaneous 1.5 psf Total Roof Dead Load R-DL 5.73 psf EXPRESSION Roof Live Load Lo 20.0 psf Member Tributary Area At < 200 sf ROOF 1 Pitch 5/12 or 23° Trubutary Area Reduction R1 1 Slope Roof Reduction R2 0.95 Reduced Roof Live Load Lr = Lo (R1) (R2)19.00 psf Ground Snow Load pg 0 Effective Roof Slope 23° Snow Importance Factor Is 1.0 Snow Exposure Factor Ce 1.0 Snow Thermal Factor Ct 1.1 Minimum Flat Roof Snow Load pf-min 0 Flat Roof Snow Load pf 0.00 Roof Slope Factor Cs-roof 0.78 ps-roof 0.00 Roof Slope Factor Cs-pv 0.78 ps-pv 0.00 (Unobstructed slippery surfaces) BARUN CORP ROOF 1 LOAD CALCULATION AGOSTINELLI RESIDENCE, 5100 PINETREE DRIVE, FORT PIERCE, FL 34982 VALUE VALUE Trap Metal Roof SLOPED ROOF SNOW LOAD ON PV PANEL SLOPED ROOF SNOW LOAD ON ROOF SNOW LOAD REDUCED ROOF LIVE LOAD (Lr) (All other surfaces) MATERIALROOF DEAD LOAD (R-DL) PV SYSTEM DEAD LOAD (PV-DL) Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com 4/8 EXISTING 5.73 psf 19.00 psf 0.00 psf EXISTING 19.78 psf 4.98 psf 19.78 psf -50.97%OK 2018 AGOSTINELLI RESIDENCE, 5100 PINETREE DRIVE, FORT PIERCE, FL 34982 Roof Snow Load (SL) = The requirements of section 806.2 of 2018 IEBC are met and the structure is permitted to remain unaltered. IEBC Provision : Load Increase (%) = (DL + Lr) / Cd =9.70 (DL + SL) / Cd =7.59 Maximum Gravity Load =9.70 0.00 WITH PV PANEL WITH PV PANEL Roof Dead Load (DL) =8.73 Roof Live Load (Lr) =0.00 BARUN CORP IEBC 5% IMPACT CHECK ROOF 1 Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com 5/8 152 23° II Gable C 0.85 15 1 3.00 0.85 300.00 1.50 3.25 1.50 2.63 1.50 1.63 ROOF ZONE GCp (-) UPLIFT 1 & 2e -1.50 2n - 3e -2.50 3r -3.60 BARUN CORP WIND CALCULATION ROOF 1 AGOSTINELLI RESIDENCE, 5100 PINETREE DRIVE, FORT PIERCE, FL 34982 SITE INFORMATION Ultimate Wind Speed (mph) = Roof Pitch (deg.) = Risk Category :Roof Type : Array Edge Factor (γE) =1.50 Exposure Category :Kd = Mean Roof Height (ft) =Kzt = Solar Array Dead Load (psf) =Kz = DESIGN CALCULATIONS qh = 0.00256*Kz*Kzt*Kd*Ke*V2 =42.68 a (ft) =4.50 Solar Array Pressure Eq. Factor (γa) =0.60 Hardware Type :S-5-N/S-5-N MINI CLAMP Allowable Load (lb) =lbs Max. X - Spacing (ft) (Zone 1 & 2e)Effective Wind Area (ft2) Max. Y - Spacing (ft) (Zone 1 & 2e)4.88 Max. X - Spacing (ft) (Zone 2n - 3e)Effective Wind Area (ft2) Max. Y - Spacing (ft) (Zone 2n - 3e)3.95 Max. X - Spacing (ft) (Zone 3r)Effective Wind Area (ft2) * Wind calculation is based on ASCE 7-16, 29.4 - C&C, LC#7: 0.6D + 0.6W used. Max. Y - Spacing (ft) (Zone 3r)2.45 -81.31 198.80 UPLIFT PRESSURE (psf) PULLOUT FORCE (lbs) -32.91 160.44 -55.96 220.75 Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com 6/8 PV module weight 2.5 psf Hardware assembly weight 0.5 psf PV-DL 3.00 psf Existing Roofing Material 1 layers 2.5 psf Underlayment 0.5 psf Plywood Sheathing 1.5 psf Framing Weight 2 x 4 @ 24 in. O.C.0.73 psf Vaulted ceiling Yes 3 psf Miscellaneous 1.5 psf Total Roof Dead Load R-DL 9.73 psf EXPRESSION Roof Live Load Lo 20.0 psf Member Tributary Area At < 200 sf ROOF 2 Pitch 1/12 or 2° Trubutary Area Reduction R1 1 Slope Roof Reduction R2 1 Reduced Roof Live Load Lr = Lo (R1) (R2)20.00 psf Ground Snow Load pg 0 Effective Roof Slope 2° Snow Importance Factor Is 1.0 Snow Exposure Factor Ce 1.0 Snow Thermal Factor Ct 1.1 Minimum Flat Roof Snow Load pf-min 0 Flat Roof Snow Load pf 0.00 . Roof Slope Factor Cs-roof 1.00 ps-roof 0.00 Roof Slope Factor Cs-pv 1.00 ps-pv 0.00 VALUE (All other surfaces) (Unobstructed slippery surfaces) SNOW LOAD SLOPED ROOF SNOW LOAD ON ROOF SLOPED ROOF SNOW LOAD ON PV PANEL BARUN CORP LOAD CALCULATION ROOF 2 AGOSTINELLI RESIDENCE, 5100 PINETREE DRIVE, FORT PIERCE, FL 34982 REDUCED ROOF LIVE LOAD (Lr) Comp Roof VALUE PV SYSTEM DEAD LOAD (PV-DL) ROOF DEAD LOAD (R-DL)MATERIAL Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com 7/8 EXISTING 9.73 psf 20.00 psf 0.00 psf EXISTING 23.78 psf 8.46 psf 23.78 psf -40.53%OK 2018IEBC Provision : The requirements of section 806.2 of 2018 IEBC are met and the structure is permitted to remain unaltered. (DL + SL) / Cd =11.07 Maximum Gravity Load =14.14 Load Increase (%) = WITH PV PANEL Roof Dead Load (DL) =12.73 Roof Live Load (Lr) =0.00 Roof Snow Load (SL) =0.00 WITH PV PANEL (DL + Lr) / Cd =14.14 AGOSTINELLI RESIDENCE, 5100 PINETREE DRIVE, FORT PIERCE, FL 34982 BARUN CORP IEBC 5% IMPACT CHECK ROOF 2 Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com 8/8 152 2° II Flat C 0.85 2 1 3.00 0.85 982.50 4.00 3.40 4.00 2.70 3.00 1.70 ROOF ZONE GCp (-) UPLIFT 1'-0.90 1 & 2 -2.30 3 -3.20 BARUN CORP WIND CALCULATION ROOF 2 AGOSTINELLI RESIDENCE, 5100 PINETREE DRIVE, FORT PIERCE, FL 34982 SITE INFORMATION Ultimate Wind Speed (mph) = Roof Pitch (deg.) = Risk Category :Roof Type : Array Edge Factor (γE) =1.50 Exposure Category :Kd = Mean Roof Height (ft) =Kzt = Solar Array Dead Load (psf) =Kz = DESIGN CALCULATIONS qh = 0.00256*Kz*Kzt*Kd*Ke*V2 =42.68 a (ft) =3.00 Solar Array Pressure Eq. Factor (γa) =0.60 Hardware Type :UNIRAC 2-Piece Aluminum Standoffs Allowable Load (lb) =lbs, S.Pine 2.5" Embedment Max. X - Spacing (ft) (Zone 1')Effective Wind Area (ft2) Max. Y - Spacing (ft) (Zone 1')13.60 Max. X - Spacing (ft) (Zone 1 & 2)Effective Wind Area (ft2) Max. Y - Spacing (ft) (Zone 1 & 2)10.80 Max. X - Spacing (ft) (Zone 3)Effective Wind Area (ft2) Max. Y - Spacing (ft) (Zone 3)5.10 -71.95 366.93 * Wind calculation is based on ASCE 7-16, 29.4 - C&C, LC#7: 0.6D + 0.6W used. UPLIFT PRESSURE (psf) PULLOUT FORCE (lbs) -18.94 257.61 -51.21 553.02 Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com