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HomeMy WebLinkAboutStructural - 108383_Harris, Martha_REV1CERTIFICATION LETTER Project Address: MARTHA HARRIS Residence 2210 NORTH 43RD STREET, FORT PIERCE, FL 34946 Design Criteria: - Applicable Codes = 2020 FLBC/FLEBC 7th Edition, 2020 FLRC 7th Edition, 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 : 2 x 4 @ 24" OC, Roof DL = 7 psf, Roof LL/SL = 20 psf (Non-PV), Roof LL/SL = 0 psf (PV) To Whom It May Concern, Sincerely, November 2, 2021 RE: 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 10:01:32 AM, 11/2/2021 Roof 1&2 OK ROOF Roof 1&2 RESULTS SUMMARYBARUN CORP MARTHA HARRIS RESIDENCE, 2210 NORTH 43RD STREET,, FORT PIERCE, FL 34946 ROOF MOUNTING PLANE STRUCTURAL EVALUATION (BASED ON IEBC 5% IMPACT CHECK) STANDOFF HARDWARE EVAULATION FOR WIND UPLIFT UPLIFT DCR RESULT 94.1% ROOF PITCH (deg.) 16° Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com 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 No 0 psf Miscellaneous 1.5 psf Total Roof Dead Load R-DL 6.73 psf EXPRESSION Roof Live Load Lo 20.0 psf Member Tributary Area At < 200 sf Roof 1&2 Pitch 4/12 or 16° 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 16° 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 0.90 ps-pv 0.00 REDUCED ROOF LIVE LOAD (Lr) (All other surfaces) MATERIALROOF DEAD LOAD (R-DL) PV SYSTEM DEAD LOAD (PV-DL) BARUN CORP Roof 1&2 LOAD CALCULATION MARTHA HARRIS RESIDENCE, 2210 NORTH 43RD STREET,, FORT PIERCE, FL 34946 VALUE VALUE Comp Roof SLOPED ROOF SNOW LOAD ON PV PANEL SLOPED ROOF SNOW LOAD ON ROOF SNOW LOAD (Unobstructed slippery surfaces) Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com EXISTING 6.73 psf 20.00 psf 0.00 psf EXISTING 21.38 psf 5.85 psf 21.38 psf -49.45%OK 2018 9.73 Roof Live Load (Lr) =0.00 BARUN CORP IEBC 5% IMPACT CHECK Roof 1&2 MARTHA HARRIS RESIDENCE, 2210 NORTH 43RD STREET,, FORT PIERCE, FL 34946 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 =10.81 (DL + SL) / Cd =8.46 Maximum Gravity Load =10.81 0.00 WITH PV PANEL WITH PV PANEL Roof Dead Load (DL) = Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com 152 16° II Gable C 0.85 25 1 3.00 0.95 982.50 4.00 3.40 3.00 3.40 3.00 3.40 ROOF ZONE GCp (-) UPLIFT 1, 2e -2.00 2n, 2r, 3e -3.00 3r -3.60 * 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) 10.20 -90.65 924.67 UPLIFT PRESSURE (psf) PULLOUT FORCE (lbs) -49.59 674.48 -75.26 767.61 Max. X - Spacing (ft) (Zone 2n, 2r, 3e) Effective Wind Area (ft2) Max. Y - Spacing (ft) (Zone 2n, 2r, 3e) 10.20 Max. X - Spacing (ft) (Zone 3r) Effective Wind Area (ft2) Allowable Load (lb) =lbs, S.Pine 2.5" Embedment Max. X - Spacing (ft) (Zone 1, 2e) Effective Wind Area (ft2) Max. Y - Spacing (ft) (Zone 1, 2e) 13.60 a (ft) =4.50 Solar Array Pressure Eq. Factor (γa) =0.60 Hardware Type :SFM INFINITY MICRORAIL WITH UNIRAC SFM INFINITY RAIL-LESS Solar Array Dead Load (psf) =Kz = DESIGN CALCULATIONS qh = 0.00256*Kz*Kzt*Kd*Ke*V2 =47.52 BARUN CORP WIND CALCULATION Roof 1&2 MARTHA HARRIS RESIDENCE, 2210 NORTH 43RD STREET,, FORT PIERCE, FL 34946 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 = Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com