BSOL2015-0004 Structural CalcsLi
1.
INNOVATIVE 29970 Technology Drive, Suite 108
IS[ STRUCTURAL Murrieta, CA 92563
t ENGINEERING Phone: (951) 600-0032
Fax: (951) 600-0036
Structural Calculations for:
I Auerbach Residence I
Photovoltaic Array Addition
54170 Avenida Cortez
La Quinta, CA 92253
Owner/DeveloQer.
New Day Solar
23811 Washington Ave. Suite C 110 #224
Murrieta, CA 92562
January 28, 2015
ISE Job#: 15 -
INNOVATIVE 29970 Technology Drive, Suite 108
STRUCTURAL Murrieta, CA 92563
ENGINEERING Phone: (951) 600-0032
Fax: (951) 600-0036
n.., . n...... _:..,.,,,�-R0OF-'-C—.W I-FOR�fI'OC/5E
Check Photovoltaic Array Addition at Buildings - 2013 California Building Code (CBC)
Roof Type: Asphalt Shingle roofing over 1/2" sheathing over 2k Rafters over 5/8" gypsum board
Live Load:
Dead Load:
:20.0 psf
Roofing Material:
2.0
psf
Sheathing:
1.5
psf
Roof Framing Members:
1.5
psf
Drywall:
3.0
psf
Insulation:
1.0
psf
Miscellaneous:
1.0
psf
Solar Array & Rack System
2.89
psf.
Roof Dead Load w/o Solar Array =
10.00
Ipsf
Roof Dead Load at Solar Array =
12.89
psf
Total Roof Load W/o Solar Array 1 30.0 Ipsf
Total Roof Load at Solar Array = 32.9 psf
Area of Solar Array Addition (for gravity check) =[4731
fe
Total Area of. Affected Trusses (for gravity check)ft2
Area of Solar Array Addition (for seismic check) =ft2Total
Area of Affected Roof (for seismic check) =ft2
Check Additional Gravity Loads on Trusses:
- Additional Load Applied
Over < 50% of Roof Area
Total Load Increase at.Affected Trusses= 1.19 psf
Percentage of Total Load Increase = E3.95% < 5.0% OK
:. Per CBC 3403.3:Additional Solar Array
Weight is Structurally Acce table
Check Additional Gravity Loads on Lateral Resisting System:
Dead Load Increase at Entire Roof = 0.45 psf
Prct. Dead Load Increase on Entire Roof= 4.48% < 10.0% OK
'. Per'CBC'34014,Additional Solar Array
'L'ateral Load'is=Si6JIcWrall Acceptable..
r
.:...�...a.....[.n.'�.ta.W:�.i.:.av:..::-:.-.�.r.r.na,.....ivoY;Lt44•':k.«.b.�fiuWu�Y.a:..l'J-i.:•::�,S,i:::+.,;�: iti. �i�:�:.: �... �'rNw..�;
INNOVATIVE 29970 Technology Drive, Suite 108
STRUCTURAL Murrieta, CA 92563
E N G I N E E R I N G (951) 600-0032, (951) 600-0036 Fax
1
ROOF MOUNTED 50LAK FANEL5
FArthaviAlrP Dprnlen nor Ar-%rF 7-1L] 1
Site Class =
D
Per Table 1613A.3.2
Latitude, deg Longitude, deg
Short Period 5.A., 55 =
1.500
U5G5
33.6551 -116.3181
Site Coefficient, F, =
1.00
Table 1613A.3.3(1)
5m6- F,5, =
1.50
EQ 16A-37
5D5 = 2/3.5me =
1.00
EQ 16A-39
Importance Factor, 1p =
1.00
Section 13.1.3
Height of Equipment, z =
11.00
ft
Height of Roof, h =
12.00
ft
Weight of Panels to each Mount, Wp =
37.80
117E,
a =
1.00
Table 13.6-1
RP =1
2.50
Table 13.6-1
Determine. Fp. 5eismic Design Force (5TRENGTH LEVEL)
Fp = (0.4ap5D5WP)(1+2z/h) / (RP/IP) =
17
Ib6 EQ.13.3-1
[Not Greater Than:] Fp=1.65D5WPIP =
60
I176 EQ 13.3-2
[Not Le6s Than:] Fp = 0.35D5WPlp =
11
lbs EQ 13.3-3
Therefore, Use Fp =
17
Ib6 at each Roof Mount Bracket
IS[1 N N 0 VAT I.V E 1 29970 Technology Drive, Suite 108
STRUCTURAL Murrieta, CA 92563
ENGINEERING (951) 60D-0032,,(951) 600-0036 Fax
ROOF MOUNTED SOLAR PANELS
Com onentc and Cladding -Wind -Load Design er ASCE 7-10, 30.4.2 h<60,ft
:r�..�..•_......,;: ;'.... - - .:. _, - .. . - ... ... -. � ,^?. .x a u�aJ�:-�^;...dr.r.,i :.-:,moi .w
Design Parameters
Design Wind Velocity (36 Gu6t), V = 110 mph
Wind Exposure =
Mean Panel Height =
Total Effective Area of Typical Array =
Panel Area to Each 5upport =
Angle of Panels —
"a'"=
C
11.00
194
18
12
4.25
Determine Wind Force at Each Roof Mount
0.00256 K, Kn Ke I =
KZ =
Kn =
Ka =
1 =
13.4
psf Load case 0.6'W
Table 30:3-1, Page 317
Figure 26.8-1, Page 252-253
Table 26.6-1; Page 250
0.85
10
0.85
1.00
GCP (Zone 1) =
0.45
1.00
Per Figures 30.41 thru 30.47
GCP (Zone 2)=
0.45
-Ilko
Per Figures 30:4-1 thry 30.1-7
GCP (Zone 3)=
0:50
-2.40
(NO PANELS IN.ZONE 3 FOR THIS PROJECT)
(+.) P = qy (GCP - GCP;) =I
psf, Positive Wind (10 psf min) - Worst Case
10.0 1
-21.5
Lateral Load at Each Mount =
37
-80
Ib6
Compression / Uplift at Each Mount =
176
--.3-76-7dIbs
Rauf_ Mmirt /a s=whed'to romfWw.% 1ny A.iwfine b" w/(f) &76-x 3-1/ZrrLV Div/t w/M/n. 2° thrnwd
Embed
Allowable Load6 for'5/16",Dtameter.;Lag Screw ;erthg,2012kNDS
(Table 11.2A) Withdrswl= 266 Ib/in x 2" x: (Cd =1.6) = 851 I1'6
(Table 11K) Shear= 140 lb x (Cd = 1.6) = 224 lbs
soLARARRAYArTACHMENTMETHOD/a smvaURALLYAL4XPTA&E////I/