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BARuN CORP
January 27, 2022
RE
Project Address:
Design Criteria:
CERTIFICATION LETTER
CEDRIC ALLWOOD RESIDENCE
48 SILVER OAK DRIVE
PORT ST. LUCIE. FL 34952
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 = 158 mph, Exposure Category C, Partially/Fully Enclosed Method
Ground Snow Load = 0 psf
Roof 1&2 : 2 x 4 @ 24" OC, Roof DL = 12 psf, Roof LL/SL = 20 psf (Non-PV), Roof LL/SL = 0 psf (PV)
To Whom It May Concern,
A job site survey of the existing framing system of the address indicated above was performed . All structural evaluation is based on the
site inspection observations and 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, with blocking upgrades in
Roof 2 (Hip), 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.
Sincerely, wI111'111rr FL
i . 0 YUR!q��'�.
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Yurianto °so- a,� o. N86261
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os�_os ���• STATE OF
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//ZONALE
By Yuri at 6:34:07 AM, 112712022
This item has been electronically signed and sealed by
Yurianto Yurianto, SE, PE. on the date and/or time
stamp shown using a digital signature. Printed copies
of this document are not considered signed and sealed
and the signature must be verified by a 3rd Party
Certificate Authority on any electronic copy.
Barun Corp I Design and Engineering 1610.202.4506 1 chrisk@barun-corp.com I www.barun-corp.com
2/5
BARUN CORP
ImmIrm I
CEDRIC ALLWOOD RESIDENCE, 48 SILVER OAK DRIVE, PORT ST. LUCIE, FL 34952
MOUNTING
•••
PLANE STRUCTURAL EVALUATION (BASED ON IEBC 5% IMPACT CHECK)
•••
' STANDOFF HARDWARE
EVAULATION FOR WIND UPLIFT '
Barun Corp I Design and Engineering 1610.202.4506 1 chrisk@barun-corp.com I www.barun-corp.com
3/5
PV SYSTEM DEAD LOAD
PV module weight
Hardware assembly weight
2.5 psf
0.5 psf
PV-DL 3.00 psf
ROOF DEAD LOAD•
Existing Roofing Material
Comp Roof 3 layers
7.5 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
11.73 psf
REDUCED ••• •EXPRESSION
Roof Live Load
Lo
20.0 psf
Member Tributary Area
At
< 200 sf
Roof 1&2 Pitch
4/12 or 18'
Trubutary Area Reduction
Rl
1
Slope Roof Reduction
Rz
1
Reduced Roof Live Load
Lr = Lo (RI) (R2)
20.00 psf
SNOW LOAD
Ground Snow Load
pg
0
Effective Roof Slope
18'
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
pr
0.00
SLOPED ROOF SNOW LOAD ON PV PANEL (Unobstructed slippery surface1
Roof Slope Factor•
Barun Corp I Design and Engineering 1610.202.4506 1 chrisk@barun-corp.com I www.barun-corp.com
4/5
BPR"MRMPE
IEBC ■ IMPACT
-
Roof 1&2
CEDRIC ALLWOOD RESIDENCE, 48 SILVER OAK DRIVE, PORT ST. LUCIE, FL 34952
Roof Dead Load (DL) =
Roof Dead Load (DL) =
11.73
14.73
Roof Live Load (Lr) =
20.00
0.00
Roof Snow Load (SL) =
0.00
0.00
WITH PV PANEL
(DL + Lr) / Cd =
EXISTING
25.38
16.37
(DL +SL)/Cd=
10.20
12.81
Maximum Gravity Load =
25.38
16.37
Load Increase (%) _
-35.53%
IEBC Provision :
1 2018
OK
psf
psf
psf
psf
psf
psf
The requirements of section 806.2 of 2018 IEBC are met and the structure is permitted to remain unaltered.
Barun Corp I Design and Engineering 1610.202.4506 1 chrisk@barun-corp.com I www.barun-corp.com
5/5
SITE INFORMATION
Ultimate Wind Speed (mph) = 158
Roof Pitch (deg.) =
18°
Risk Category :
II
Roof Type :
Hip
Exposure Category :
C
Kd =
0.85
Mean Roof Height (ft) =
15
Kzt =
1
Solar Array Dead Load (psf) =
3.00
Kz =
0.85
DESIGN CALCULATIONS
qh = 0.00256*Kz*Kzt*Kd*Ke*V2 =
46.11
a (ft) =
3.00
Array Edge Factor (yE) =
1.50
Solar Array Pressure Eq. Factor (ya) =
0.60
Hardware Type :
SFM INFINITY MICRORAIL WITH UNIRAC SFM INFINITY RAIL -LESS
Allowable Load (lb) =
982.50
Ibs, S.Pine 2.5" Embedment
Max. X - Spacing (ft) (Zone 1)
4.00
Effective Wind Area (ft2)
Max. Y - Spacing (ft) (Zone 1)
3.30
13.20
Max. X - Spacing (ft) (Zone 2r)
4.00
Effective Wind Area (ft)
Max. Y - Spacing (ft) (Zone 2r)
3.30
13.20
Max. X - Spacing (ft) (Zone 2e & 3)
4.00
Effective Wind Area (ft)
Max. Y - Spacing (ft) (Zone 2e & 3)
3.30
13.20
ROOFZONE GCp (-) UPLIFT
1 -1.30
UPLIFT PRESSURE (psf) PULLOUTFORCE
-30.66 404.70
2r -1.75
-41.86 552.61
2e & 3 -2.35
-56.81 749.83
* Wind calculation is based on ASCE 7-16, 29.4 - C&C, LC#7: 0.61) + 0.6W used.
-4A to 1D0
•3.8
-3.6
3A
-32
_ -3.a
.22
C]� •2.6
v 2.4
2.G
a� •1.5
E -1.2
-ls
A4
w 400
+0.4
;0A
+A8
+1D
4.5
2A
•31,.gq6
+03
-13
40
1 10 20 50 W 200 5001(100
W (09) 19 (All 0 " (4e "
Effective Wind Area, ft 2(M2)
7 In" -
q •2.8
.0
•2A
.22
-2.08
lb -
•1.4 -
1.2 -
-1.0
A4 - -
-02
0
42
Wb Al AM II
+08
f10
U
-2.9
�
11II
E
L�
+43
417
1
ID 20 50 l0D 200 SDOt000
ft
(8i M (40 teal CK (46=9P
Effective Wind Area, it 2(M2)
e
FIGURE 30.3-2E Components and Cladding [h < 60 ft (h < 18.3 m)): External Pressure Coefficients, (GCp), for Enclosed and Partially
Enclosed Buildings -Hip Roofs, 7° <9 < 20' (Roof)
Barun Corp I Design and Engineering 1610.202.4506 1 chrisk@barun-corp.com I www.barun-corp.com
(E) JACK TRUSS
TOP CHORD
51
[Ey HIP TRUSS
TOPCHORD
(E) PLYWOOD
SHEATHING
(N) VERTICAL2x4 or 2x& 9LOCK
(N) SIMPSON A34 CLIP
AT EACH END OF THE BLOCK
BLOCKING UPGRADE
NTS
INSTALLATION NOTES:
• CUT AND ADD (N) 2x4 (or 2x6) BLOCKING AS
SHOWN IN S1.
FASTEN (N) 2x BLOCKING TO (E) HIP TRUSS TOP
CHORD USING SIMPSON A34 CLIP ON EACH SIDE.
INSTALL BLOCKING AT ALL LOCATIONS THAT REQUIRE
A PV SYSTEM MOUNT/LAG.