HomeMy WebLinkAboutAPPROVED, Structural Calculation - signedRE:CERTIFICATION LETTER
Project Address: MOHAMMED Residence
8532 COBBLESTONE DRIVE
FORT PIERCE, FL 34945
Design Criteria:
- Applicable Codes = 2020 FLBC 7th Edition, 2018 IEBC/IBC, 2018 IRC, ASCE 7-16 and 2018 NDS
- Risk Category = II
- Wind Speed = 160 mph, Exposure Category C, Partially/Fully Enclosed Method
- Ground Snow Load = 0 psf
- ROOF 1 - 4 : Roof DL = 7 psf, Roof LL/SL = 18 psf (Non-PV), Roof LL/SL = 0 psf (PV)
To Whom It May Concern,
Sincerely,
November 3, 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.
Installer shall verify existing roof framing (including connection) is in suitable condition and does not exhibit any signs of structural
damage or deficiency. Blocking upgrade may be needed on hip roofs. Installation team to confirm this in the field prior to installation.
Installer verification of the mounting planes noted above is required because some or all of the framing was not observed prior to the
structural evaluation performed for this report.
Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com
By Yuri at 7:38:39 PM, 11/3/2021
ROOF 1 - 4 OK
ROOF
ROOF 1 - 4
RESULTS SUMMARYBARUN CORP
MOHAMMED RESIDENCE, 8532 COBBLESTONE DRIVE, FORT PIERCE, FL 34945
ROOF
MOUNTING PLANE STRUCTURAL EVALUATION (BASED ON IEBC 5% IMPACT CHECK)
STANDOFF HARDWARE EVAULATION FOR WIND UPLIFT
UPLIFT DCR
RESULT
79.4%
ROOF PITCH (deg.)
27°
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 - 4 Pitch 6/12 or 27°
Trubutary Area Reduction R1 1
Slope Roof Reduction R2 0.9
Reduced Roof Live Load Lr = Lo (R1) (R2)18.00 psf
Ground Snow Load pg 0
Effective Roof Slope 27°
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 0.72
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 - 4
LOAD CALCULATION
MOHAMMED RESIDENCE, 8532 COBBLESTONE DRIVE, FORT PIERCE, FL 34945
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
18.00 psf
0.00 psf
EXISTING
19.78 psf
5.85 psf
19.78 psf
-45.36%OK
2018
9.73
Roof Live Load (Lr) =0.00
BARUN CORP IEBC 5% IMPACT CHECK
ROOF 1 - 4
MOHAMMED RESIDENCE, 8532 COBBLESTONE DRIVE, FORT PIERCE, FL 34945
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
160 27°
II Hip
C 0.85
30 1
3.00 0.98
982.50
4.00
3.40
4.00
2.70
3.00
1.70
ROOF ZONE GCp (-) UPLIFT
1 & 2e -1.50
2n - 3e -2.50
3r -3.40
* 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) 5.10
-98.86 504.17
UPLIFT PRESSURE (psf) PULLOUT FORCE (lbs)
-42.72 580.95
-72.26 780.45
Max. X - Spacing (ft) (Zone 2n - 3e) Effective Wind Area (ft2)
Max. Y - Spacing (ft) (Zone 2n - 3e) 10.80
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
4.50
Solar Array Pressure Eq. Factor (γa) =0.60
Hardware Type :QMLM-B-12 L-MOUNT
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 =54.72
a (ft) =
BARUN CORP WIND CALCULATION
ROOF 1 - 4
MOHAMMED RESIDENCE, 8532 COBBLESTONE DRIVE, FORT PIERCE, FL 34945
SITE INFORMATION
Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com
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