Jordan Bolibol - Stamped Engineering Letter FlatDomus, Donius Structural Engineering, LLO
-S T{ R EJ C T U R A L P_O. Box 560
Broomfield, CO 80088
{ a i N F F Ti i lei G. T. 1. C 5 0-864-7055
projects damusstfuc_com
January A, 2075
71W Blue. Raven Solar
1403 North Research ih ", WIdi V 1
(]rrrn, UI. ZSWJ!
Subject_ Cei-Tifiiration I etrer
Bulibul FkriOuncc
151Ra Pfes+rnTT Loop SF
Yelm, WA- g8597
to Whonr It May Cuncrru,
A jubsite observa Gun of the condition of the cxistirrg f rarnirrg systcnr was perf urwrd by ark audit tram EPI Blur Raven 5olat as a
rrqurst frnrn Donau'. STnirrura I F ngineeringr All reviaw iS based on these ohservations and the design criteria I isted helaw and
urrly droned Valid if pruvidrd infurmaHupp is true and acYuratr=.
On the above referenced project, the root structural training has been reviewed For additional Ioadlrig due to the Instalratlon of
the solar PV addition to Lhu roof. 1 hu sLrucLurul resriuwr only applicn Lo the suCLiurr of thu roof tha is dirudiy sappurtirrg Lhw solar
PV system and its supporting elements. The observed root traming Is described below. It field candltlons dlfter, contractor to
rrutify engincYr pp fur to star king cunstrudiun_
Tic ruul Arur:ture ul �MP1) cunsists ul curnpusitiun shirrglu on ruui plywu4d that Is supported by pre-manuiactu red trusses that
a re spaced at @ 24"o.c.. The top chords, sloped at 23 degrees, are 2M sections, Cie horrom rho rds are 2x4 sertlorm and the weh
rnumber s u rc Zx4 sections. 1 he tr uss morn bu rs are conncctud by Acel gusset pl ates. The max uns upported projected horlxontol
rap chord span is appmximat,-. ly fi'-4"•
The existing roof fra ming syrsrem of (M P1) is judged to he adequate to withstand the load ing imposed by the insda Illation of the
solar panels. No reinforcement Is necessary.
11W SpUdrlYOFtell' SUlar StLM&1U fs-Amuld bu kept at YZ" o.l_ FUr Iirrrdsiapu Lipid 48"U.c. lei pup trLiitoricntuLiun,wltll i] staggered
pattern to ensure proper dlstrlbution of loads.
The scope of this report Is strictly Ilmlted to an evaluatlon of the tastener attafhment, underlying framing and Supporting
st ructurr on ly. 1 h u u ttu rhnocn is to the rxistirrg sir uctur a ar a rcyuir ud to be In a staggered patte rn to ensure proper dlArl bution
of loading. All panersr ranking and hardware shall he installed per manufarturcr spcdficotiuros and within specified dcsigrr
llm Itations. All waterprooting sha II be provided by the manutacturer. DomuS Stn,r.Tural F ngineerirrg assu mes no Fes pondhi liry
for misuse or improper installation of the solar PV pa nets or ranking.
ae5ijm Criteria:
• Appllcable Codes = 2021 IB IRC, ASCE 7-16
• Roof Dead Load 7 psf (MP1�
• Root Live Load = 20 pst
• Wind Speed = 114 mph �Vult)r Exposure C
• Roof Snnw I oad 25 psf
■ Attuchmcnt= 1 1014 Wood Screws wiLh 1_fS iror:h min_ cvnbcdrnu-.nT
depth, at spacing shower above.
11IL-aw auntact me with arty Further questions or cancer rrs r egarding this prajvrL
Sincerely,
Jahn Calvert, P.E.
Projer.T Fnginerzr
t AL - C,4
Digitally signed
by John A. Calvert
Date: 20 ,01.0
10.10.20-07r00'
Bolbol Yelm WA 1
Domus, Donius Structural Engineering, LLO
T{ R EJC T U R A L P_O. Box 560
Broomfield, CO 80088
{ a i N F F Ti i lei G. T. 1. C 5 0-864-7055
projects domusstfuc_com
Untvity Leading
Roof SAOvl LOW Calkull iom
pg = Ground Snow Load =
2h_ll pil
N = 0.7 C. Cr l Po
(A.S T7 - rq 7-1)
C, Fzpmure rartnr
1
(Asa --I - I Due 1-2)
C, = Tfremml Fwr m =
1
(ASf3E7 TAW 7.3)
I = Irr�p lance Factor =
1
pF Flat FZmf Snow Load =
75 0 psf
fk = C..R
(ASC.E7 Eq 7 2)
C3 = Slope Factor =
100
pi = Sloped Roof Snow Load =
ao psf
PV Dmd Lead = 3 psf (Per Blue Raven Solitrl
A PdJustad irr 1:1 I )ACrzA Mr�A
:125 PST
PV System Weight
Waght of I'V Spleitt (I ler Blue Raven S;olar)
3.4 par
X Standoff Spa nq
d 00 ff
Y Rtandrdf Npa anp
6 M ff
5landoll I nbulery Area =
24.33 alt
Point Loads of Standoffs
73 lb
Nnre- PV srandoffs era ataggared to insure pw4w dLarributian of loading
Roof Live Load = 20 paf
Note: Reef live load i9 romoved in area's covered by f'Y array.
Roof {lead Load (MP1 )
Composition Shingle
4.00 psf
I {twl I'Ipw�Yxl
7 60 psf
2M Tap Chords @ 24'o.c.
U.73 psf
Vaulted Ceiling
U 60 psf (C.ailinn Not Vardtad)
Miu4xllanwuj
0 27 psf
TolaI Roof aL (MP1M
7.0 psf
Pl. Adlusled 1n 21 f?pgmn SlnCA
7.63 pef
Bolbal Yelm WA 2
(),N1 IT ;i Domus Stfuctural Engineering, Lt_C
P.O. Bost 560
'I' ! L T 1t L c' Broomfield,CO 80038
1 ,L ]l T rti G I i c' 53G Sfr4-705�
projects Odom usstruc.corn
Wlnd Calculatlona
Per ASCE 7•16 Components and Cladding
Input Variables
Wind Speed
i W mph
Lx�' Cawgcry
c;
RD01 Shape
Gable Rea!
Rani AciFe
73 dWFeb
Mean RDDf 14eighi
24 A
Elkw.bw- Wod Aim
21.311
GmundClewalion
Oft
Design Wind Premu re C alculatians
qh 00V.rG' KZ' K7l' Kd' Ke'W2
(Fq 26 W 1)
Kz ([)Pwm CDM$Dw* 0-9d
ruble30.3-1)
M {TopoFaphic Fadm 100
LFig 26 9 1 �
Kd (Wind Lkucbxwhly FadM = QM
r f abk. 26.& 1)
Ke (Ground Llew� FaCM = 1-01)
V (Ucagn Wind SpxxA = 110 mph
(Fig. W.b4A)
Risk Caleg = II
Cable 1.5-1)
qh 23 75 pri
ShMoff Uplift Calculnflum-Porkrot
Torre 1
7cne 7
zum 3
Vix ilrm.
ya=
6.67
0.T7
0w
067
GGP =
-1.4t�
-2.41
-3.14
0.44
Up1ih Pressure =
45.1 prf
-44.1 gef
-58-8 psf
7.1 psf
ASU Uplft F nni w _
-13.9 p9f
-26.4 g9f
-35-3 psf
9A psf
% Standaffff Spacing =
4-0011
4.00 IF[
2.67 ft
Y9hindaHAp.-ing
908111
3N11
304ft
Tlihulary Area -
24.33 sqH
12-17 sit
S 11 sgfl
nand I andfn at wbnrksnf
73Ih
37Ib
74lb
Footing Uplift (4.60+0-SW) _
-293 lb
-3W lb
-272 11b
Standoff VpliR Cslculstions4-andarapb
/car. 1
zuic 2
Zane 3
f asihw
y, =
069
a T9
0M
0.69
GCP =
-IA59
-2.48
3 N.
046
Uptifl Prmmre
24 4 INf
445 iS IN r
- 0.9 Pgf
7-6 PSF
A8U Upkit Pn_m.Rjru �OAW�=
-14.7 p9f
-29.0 g9f
-36.5 paf
9-b psf
X 5handufl5padr%l
6-4U 11
6.00 ft
4A0 IL
Y 9fandaff Ape.-ing
350fi
117511
1.75 it
InbularyAim
21.O0bglt
W50sgll
700sgfl
dead Load on uM&rnent =
63 lb.
32 b
21 th
Footing Uplift (4.SNO-M) _
470 lb
-275 lb
-2431 h
9landoff UpliftChedl
Ma;omum Dwe n l Ipit 300 b
61unduif Upldl Caprnaly = 4W lb
4W i.� capaeily - 300 lb demand Therefore, OK
Fastener Capedty Check
!-sums = 2 - m 1-' VVuud k5utws
Nunberof fasteners= 2
bAKAoiunl Ucplh = 1.15 in.
Pullout Capacity f er rnch = M b
F.whnerC--paary fOSb
wJ F.8- oR 1.'u a UC L u1 $-& bW b
SW lb cip w* > 3W lb demand Therefore, OK
(Fig- 30 3)
(Eq. 29.4-7)
(FKl 30 3}
(Eq. 29.4-Y)
Bollbol Yelm VVA 3
Domu
-S T{ R 1JC T U R A L
{ a i N F F Ti i lei G. T. 1. C.
Framing Clieck
IMP11
Donius Structural Engineering, LLO
P_O. Box 560
Broomfield, CO 80088
51}-864-7056
projects darnusstruc_com
PASS
w _ 72 plt
1]esd Lowd
f 6 Qyl
I IV Luad
3.3 pyl
Snow Load
25_� psf
ZO l aµ Chords @4 24'a_c.
C,ovaminj� load Cnmbo
(}I + S1
Meruber 5µsn = 6 - 9'
Total Load
36_9 psf
Member Properlfes
Member Sixes
S (103)
1 [inr4]
Lumber Sp1Gr Member Spacing
2x4
3.06
i 36
DFtr2 @ 24'o.c.
Check Banding Stress
Fb (p3i) = Ft x Cd x Cl x C r (NDS Tables 4.3.1)
4 x 1.15 x 1.t� x 115
Ahmed bending Strm = 1 f8b.a µor
Maximum Wmenl = W2)16
= 408-N d 0
= 4907.106 irrJf
Actual Banding Stress = (Maximum Murneril) IS
= 1i14U_f Pa
Allowed f Actual - 69,7% Wressed - Therefore, UK
Check Deflection
AlmwA f}allaction (Total I oad)
, :;.I' (F i [''Cil oo psi Pfrrr Nfi9}
045e
Deflecrinn C. toda f qmd on
IwoOnuous Span
Artual Dnfleclinn (Toral I nad)
W1 Ai) J (1 M511-1I)
0163 in
11497 > 11180 Therefore OK
Alowed Dolfection (Live Load) = U240
0.337 in
Actual Dcflec- an (Live Load) _ WLh4) J (18.a"S"1)
0.114 in
Wii 'o L1240 Therefore Olt
Check Shear
Member Area = 5.3 W2 Fv (psi) = 100 psi (NDS Table 4A)
Plluwed Shear = Fv' A = 34 b Max Shear M = w' L12 = 2421b
Allowed } Actual - 2,5.7% Stressed - Therefore, OK
Bolibal Yelm WA 4
Domus, Donius Structural Engineering, LLO
T{ R 1JC T U R A L P_O. Box 560
Broomfield, CO 80088
{ a i N F F Ti i lei G. T. 1. C'. 5 0-864-7055
projects damusstfuc_com
Laterar Check
Existing Weight of Effsctad Building
Level
Area Weight;psf
wal-Ohl (Ib}
Root
146ti sl 7 6 pnf
$117i lb
Ceiling
14W9 A ti.0 psf
8814 lb
Wwd Sidiny
100 II b.0 per
20M lb {8' U' Wall Height}
Inl Walls
100 ft 1 64 pal I
P5%O lb
Existing Weight of Effected Building
24W Ih
P roposed Weight of PV Syslem
Wevyhl 01 I IV System �i'er BILKA Fawn Solari
9.0 pu1
Apprux Area of i lrupa+ed FV Splern
24W A
Approxim ale Total Weight of PV System
e97 lb
10% Comparison
10% of Existing Building Witight [All awed1 24551b
Approximate Weight of PV System (Actudl 1497 lb
PeroentIncrease 3 7%
2456 1b f 0971b, Therefore OK
Bolrbol Yelm WA 5
I 0mu
k I- KLCT U K A L
Appsndlx A- Gomm Notes
GENERAL
Donius Structural Engineering, LLC
P_O. Box 560
Broomfield, CO 80088
51}-864-7056
projects damusstruc_com
r The a tractor Shall veniy all tllmenpow property selCadCs, AI 1.111 KA CCAM-, cluvakwti arxi sac eunditxnis butui u
starting work and sl►all nVify D olds; �Anrchral CrLxreenng_ LLCOT anyd6suepuricns
d, NI repW CMWJLL4lrn5 npxerent I km iF, Strurheal E-n.rpwwtrq. L L C'S hest professional jutlgment based upon irTdustry
SLlfrlant4
♦ AuAAvc any eunllids Enk Hw d)aMrKjrs Wth chorus Shudurdl Ergirw-xq uq, I I t: her ". pmrp.erlinq with cnFul aidnn
F L he tlrcxln rnlflla ir-M rnr IN% prc*wl Ji Irsled nn the irsr paele rrl the report IS based on fire erigineers best Xxgernent
amVor prowlded by ft ATC oouncll. At U spmmc requests aW tllrrer. Pk.Lersu arltdct 4jur knnri it Dw dcaiyri crkrid mixis to
be moll W.
r A sits mit vrds rKA phy hilly raxludud by 6unrrrs Sbudwal EighxxLrirxl, l I 1, 1 hP arfrrmpanyinq r alail arnns and
ccrtilicatiun ac pruvkkxd wrlh Dw uwk-nlandirrg That the sac bulldirrg wri r"uJruchm sLandarcLs nwh-.tan 3rr.P.pramp. Lem nr
1K)USI y standards. It Shall be the COMCM respXrSOLly to i0entily any rregularltles such as Inoanslstenk framffV
conditions, waler tlamage, We damage, aacketl, split or noticeably Wee" framing members.
* 1 krrrrJS Rhaidun1 l--Wrrr wmwj j, I L C w neat resfinristle rrir fmykwj L safely rrrrawres or ffqularrms r her rnmrarter sJiall
rke_vgn, cmx turf and mLwOmn all safehrri safety devires KwAKU)q srrq anrF harr ragnd , aqtA t7P mAery rP.-4mnsRrle inr
woof MV to aN kreaL state and federal safety mid r"h slandards, lams and regulWom. Tkle oanhaclor shah take
mcessary precautions to mallrtaln and Insure ttie Integrity oT Me sbudure dunrTg c:msbrlctton. n a kirw Jlt Is FOW by One oT
fhe c wWWors or SukoWactWs employees_ or any one else. "contractorwN IrKk-=fly, dlelend and hotel foie ownerantl
Oarms Strudural ErKoneennq, LLC Irmm less of airy and aA such claims-
* Any and all wakL'IT}I ucrring Iwll LrC pi uyklud IJy AIL' owbaOix. Nxim SUucbmal Enylneurip g, LLC is rKA it.-4 l6I:Ar= her
warripnxdnq
* All h fhw. re Mall lie Insrafk?d pgr manutadurer giw-11r Vwxir4.and wrlhln _ mc.ff l deilgR 1r1 Utalm% 1 hwmj5 :ihur.ft al
t.rgirreenng. LLL' a55Ume5 no re5pon5iVirly Tor InoDrTeCdy Ii-PsLI P.0 haRhyare rr harrK are in:Jalk-d ouLr nl C-e.
rrrdnldduror s7acc�fraGorn.
USER RELJANCE
• Uwws Snelural EnglrweFVV, LLC was engaged by Blue Raven Saar (L wr rr� to FW.dfXm rhos Wne :mem I h1% rffkV and
the Inrormatton 1t►erean, are far me exdusNe use OP the CIIerg. This repaid hw4 rm Mim. purlxMe and spas not he relied upon.
La used, by aq ellYta per m or enlity wtllKxA the wngen ccr►seril of fkrnus Slinictural EnglfwWrPg, LLC. Thkd palUes that
obldrn Uus i LVA. +x the inrunualk n rwMk skan lww no iiylib ur warm w ur w-umCYy againA Dwrxn Shuclurdf
Sx3rrK!L!rirrg, LLC, YIs uflicurs Em orrQYryxcs.
ROOF MOUNTED ARRAYS
• Ir an ana" oT a suppating slucIft Is Included In olio scope oT nark the structural assessment only applies to Me secUDn
aTthe roof that Is dredly uppordng die Vopmed solar PV system.
r NogmcWral ffTffbm rm be W Tor 4nldult, ctc., unkssspeMcMyshawm Wain [>rtarmdten approval V Imutimm of
my additiaial iwAmL c1c.
F tt Is assumed that a standard quality of oanstrucbm care was used to oorr%lrurr me arkKLV dudrng a sJuM he the
corrtradors responslbllrtyto MW verrry any mid at ftwFiiing mefters sl4porEM me prgxF,-d 1JV arxyare o aA irate
condition The oWradu s1hall dell Inspect W KCLstarrdard mmtrucW mown%. qqw; fit eery mr, mrM. ire dxwgP, F]c rood
FKXN engineer ll any cwiprarnlmed rnateflal is Tound on site prior to slarurxl fit rnjrJnn
* rr is amrmed Ihat nwP. Rave peen nn ark]ihmal kiarls (FFVAL`, nr WP egLPViK.yrl~ dcMLwrdi IiWrs of roofing, e' Q added to
the Miildinq over the fixrse of "- stnidurek hntrrrp I he ronhadrr arrdkw cikYik atidll weydy tliis wrUr ULc pruprLYty urmey
arxt irony I kmis S1nirhral Fngneennq. L 1 C rr aMlwmal triad hail bpe1L added to tlx-Aijduru alrudcly.
F 0exlb4e utilrty omnedlons atust W and al airy 61JIkIIrrg selsmlc fdr►l.
* Care slrr; Al he rakfm In eaurre Sot PV anays fla nr}t predi". drainW. of rain water.
F Unless othetwsse noted, omslr=m makmal shall Ire everuy list 1buked ri plamA Lwk hair -A km-i or wors. LuaLls-.JEA rxit
momd the allowable fording Tor the suppMrig ntalrbers and mew 4clrrructms.
d, NI laps rir mind wxev+s at the rr}nt she• he stanlesE srewJ ,anrl insta M MI:11 lg fJ1e ffkM 113 oT the dimensional w knh oT the
Treming frrcrnbers.
r Ali racamms shall he a minirreim rq W .away horn any hiss panel err hinge pints_ truss plates arwx memo& eilm. meld
veYrty Iriratm rrl lasienem olio to slartrg rrristnrrrrm hll Tmrrrrers Shall be pre-dMIM to avoid SpInng ensting llum ef.
* Orirnus Sbudurdi Er4rLening, LLC r neat i u-il"i AL tuf dumnJE c efierK of cxknw chwMuig ri sJrdutl nn ert the F^f array
lair any damage to dorwirs" decks, roofs. walkways, Iarldiscaplrg, allbffMes, pets, people, etc.. If SnOw guards are
requested by W cuMormr, ndlty Dams Strucl:Lft Erkgmering. LLC.
Bollbol Yelm WA 6