HomeMy WebLinkAboutCERTIFICATION LETTER1/5
RE:CERTIFICATION LETTER
Project Address: EDUARDO CARDONA RESIDENCE
5409 SUNSET BOULEVARD
FORT PIERCE, FL 34982
Design Criteria:
- Applicable Codes = 2020 FLBC/FLEBC 7th Edition, 2020 FLRC 7th Edition, 2018 IEBC/IBC/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 : Roof DL = 7 psf, Roof LL/SL = 20 psf (Non-PV), Roof LL/SL = 0 psf (PV)
To Whom It May Concern,
Sincerely,
January 5, 2022
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. 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 9:39:32 AM, 1/5/2022
2/5
Roof 1 OK
ROOF
Roof 1
RESULTS SUMMARYBARUN CORP
EDUARDO CARDONA RESIDENCE, 5409 SUNSET BOULEVARD, FORT PIERCE, FL 34982
ROOF
MOUNTING PLANE STRUCTURAL EVALUATION (BASED ON IEBC 5% IMPACT CHECK)
STANDOFF HARDWARE EVALUATION FOR WIND UPLIFT
UPLIFT DCR
RESULT
85.4%
ROOF PITCH (deg.)
18°
Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com
3/5
PV module weight 2.50 psf
Hardware assembly weight 0.50 psf
Total PV System Dead Load PV-DL =3.00 psf
Existing Roofing Material 1 layers 2.50 psf
Underlayment 0.50 psf
Plywood Sheathing 1.50 psf
Framing Weight 0.73 psf
Vaulted ceiling No 0.00 psf
Miscellaneous 1.50 psf
Total Roof Dead Load R-DL =6.73 psf
EXPRESSION
Roof Live Load Lo 20.00 psf
Member Tributary Area At < 200 sf
Roof 1 Pitch 4/12 or 18°
Trubutary Area Reduction R1 1.00
Slope Roof Reduction R2 1.00
Reduced Roof Live Load Lr = Lo (R1) (R2) =20.00 psf
Ground Snow Load pg =0.00
Effective Roof Slope 18°
Snow Importance Factor Is =1.00
Snow Exposure Factor Ce =1.00
Snow Thermal Factor Ct =1.10
Minimum Flat Roof Snow Load pf-min =0.00
Flat Roof Snow Load pf =0.00 psf
Roof Slope Factor Cs-roof =1.00
Sloped Roof Snow Load on Roof ps-roof =0.00 psf
Roof Slope Factor Cs-pv =0.87
Sloped Roof Snow Load on PV Panel ps-pv =0.00 psf
REDUCED ROOF LIVE LOAD (Lr)
VALUE
MATERIAL/ROOFING DETAILS VALUEROOF DEAD LOAD (R-DL)
2 x 4 @ 24 in. O.C.
VALUE
Comp Roof
SNOW LOAD
BARUN CORP Roof 1
LOAD CALCULATION
EDUARDO CARDONA RESIDENCE, 5409 SUNSET BOULEVARD, FORT PIERCE, FL 34982
VALUE
PV SYSTEM DEAD LOAD (PV-DL)
SLOPED ROOF SNOW LOAD ON PV PANEL (Unobstructed Slippery Surfaces)
SLOPED ROOF SNOW LOAD ON ROOF (Non-Slippery Surfaces)
VALUE
VALUE
Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com
4/5
EXISTING
6.73 psf
20.00 psf
0.00 psf
EXISTING
21.38 psf
5.85 psf
21.38 psf
-49.45%OK
2018
BARUN CORP IEBC 5% IMPACT CHECK
Roof 1
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) =9.73
EDUARDO CARDONA RESIDENCE, 5409 SUNSET BOULEVARD, FORT PIERCE, FL 34982
Roof Live Load (Lr) =0.00
Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com
5/5
160 18°
II Gable
C 0.85
15 1
3.00 0.85
982.50 lbs
4.00
3.10
3.00
3.10
3.00
3.10
ROOF ZONE GCp (-) UPLIFT
1 & 2e -2.00
2n - 3e -3.00
3r -3.60
Max. Y - Spacing (ft) (Zone 3r)9.30
-90.22 839.00
UPLIFT PRESSURE (psf) PULLOUT FORCE (lbs)
-49.36 612.05
-74.89 696.51
* Wind calculation is based on ASCE 7-16, 29.4 - C&C, LC#7: 0.6D + 0.6W used.
Max. Y - Spacing (ft) (Zone 2n - 3e)9.30
Max. X - Spacing (ft) (Zone 3r)Effective Wind Area (ft2)
Solar Array Pressure Eq. Factor (γa) =0.60
Allowable Load =S. Pine, 2.5" lag embedment
Max. X - Spacing (ft) (Zone 1 & 2e)Effective Wind Area (ft2)
Max. Y - Spacing (ft) (Zone 1 & 2e)12.40
Max. X - Spacing (ft) (Zone 2n - 3e)Effective Wind Area (ft2)
BARUN CORP WIND UPLIFT CALCULATION
Roof 1
EDUARDO CARDONA RESIDENCE, 5409 SUNSET BOULEVARD, FORT PIERCE, FL 34982
Ultimate Wind Speed (mph) =Roof Pitch (deg.) =
SITE INFORMATION
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
Wind Velocity Press. (qh) = 0.00256*Kz*Kzt*Kd*Ke*V2 =47.29 psf
a (ft) =3.00
Barun Corp | Design and Engineering | 610.202.4506 | chrisk@barun-corp.com | www.barun-corp.com
Coefficients
PLAN
FIGURE 30.3-2B Components and Cladding [h ≤60 ft (h ≤18.3 m)]: External Pressure Coefficients, (GCp ), for Enclosed and Partially
Enclosed Buildings—Gable Roofs, 7°<θ ≤20°