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Home My WebLink AboutB17-1506 000-000-000 (2)SIVA Starling :Madison Lofqui t; Inc. Consulting* Structural.. and Fo-ren.sic. Engineers 5224 -South 39th -Street- Phoenix, Arizona 85040 tel: (602) 438-2500 fax: (602) 438-2505 ROC#291316 www.smleng.com Royal Aire .Inc. January 17, 2018 2530 Zanella Way Suite APae 1 of 2 Chico, CA 95928 - 41771,50( g prRMIT _,,, ,�,T„ nr_vELOPMENT SERVICES 13UTTEwu1V', ---- REVIEWED FO CODE CONIPLIANCE v Attn: Ms. Laura Thayne / g BYE - BU DATE / COUNTY Subject: Ground Mounting System -.Structural Analysis — 5Module . Richard Stewart Residence. PV Array . JAW24 4 2018 744 Laub Rd. DEVELO P*M-ENT Gridley, CA 95948 SERVI(•Es SML Project#270-14 Dear Madam:. We have analyzed the subject ground mounted structure and determined that it is in compliance with the applicable sections of the following Reference Documents: Codes: ASCE/SEI 7-10 Min. Design Loads for Buildings & Other Structures California Building Code, 2016 Edition Other: AC428, Acceptance Criteria for Modular Framing Systems Used to Support PV Modules, dated Effective November 1; 2012 by.ICC-ES Aluminum Design Manual, 2015 Edition IronRidge Exhibit - 0002 The structure is a simple column (pier) and beam (cross pipe) system. The piers &.cross pipes. are 3 inch. standard weight (schedule 40) steel pipes. The tops of the piers are connected in the E -W direction by the cross pipes which cantilever over and extend past the end piers. The cross pipes are connected by proprietary IronRidge XR1000 Rails spanning up and down the slope which cantilever over and extend past the top and bottom cross pipes... The. solar modules are attached to the rails with IronRidge clamps. There are typically two rails per column of modules. . Gravity loads are transferred to the piers and foundations by the rails and cross pipes acting as simple beams. For lateral loads the system is a cantilever structure: The effect of seismic loads (for all design categories A -F) have been determined to be less than the effect due to wind loads in all load conditions and combinations. The pier spacing in the N -S direction is 9'-0". The pier spacing in the E -W direction is 12'-7" and is determined by the structural, design for the specified design criteria below. The governing criteria for the pier spacing is either the spanning capacity of the cross pipes or the cantilever capacity of the pier. The foundations shall be 24" diameter and shall have a depth below finished grade of 5'-5". Starling Madison Lofquist, Inc. Consulting Structural and Forensic Engineers Royal Aire. Inc. January 17, 2018 Ms. Laura Thayne Page 2 of 2 Ground Mounting System— Structural Analysis - 5 Module. Design Criteria: • 1. Panel. Tilt Angle= 25 degrees 2. Wind Exposure =, C .3 Wind Speed= 100 mph 4. Snow Load 0 psf 5. Dead Load (.Weight).=.3'psf .6. Maximum PV Panel Dimension = 65" 7. Topographic (Wind) Factor = 1.0 (no topographic effects) 8. Concrete Weight =.145 pcf /: f c = 2500 psi 9: Skin Friction per 2016 CBC 1810.3.3.1.4 & 5 10..Top l'-0" of soil neglected for Skin Friction 11: Resistance to corrosion and/or sulfate attack, along :with possible adverse effects .due to expansive - soils has not been considered in these` foundation recommendations. ' SML Engineers assumes no liability with regard to these items: 12. Soil conditions shall meet minimum requirements for Class 4. soil per 2016.CBC Table 1806..2. Soil classification is to be.determined and verified by the end user of this certification letter. The analysis assumes that the array,.including.the connections and.associated hardware, are installed in a : workmanlike manner in accordance with the IronRidge Ground Mount Installation Manual and generally accepted standards of construction practice. Verification of PV Module capacity to support the loads associated with the given array shall be the responsibility of the Contractor or Owner and not IronRidge or Starling Madison Lofquist. Please feel free to contact me at your convenience if you have any questions, Respectfully yours, Tres Warner, P.E. AZ�' 2_ Design Division Manager ujC .719 73 t EXP. r= 31 sh c�►.�F°� Starling Madison Lofquist, Inc. Consulting Structural and Forensic Engineers. -2— 1EXHIBIUEX'0-062'•,.. Y��,�� iCONCRETF, n, HWDATION n: -TAILS' Project: Richard Stewart Residence PV Array 744 Laub Rd. � - E DIS Gridley, CA 95948 Gridley, •DEQ f pFES14 A \:f i, 19 I �e , • r .a- Y ar y ai 7A �1�f_iV�Aii �`y, • ' - _ ... - . _ w . _ ... i �� yi.. .' x _... 1 -. e' .. - �...t'25 Deg. CIVIL 3" Dia.. }Y ?- � 4S_r �'.� � � ` �•"��.�i�!,i+....a..ax..ws.^•F�Y= '�n!'...f_•„7 "EQ :r 7GALVANIZED.P.IPE • r ', w -DISTANCE f a - - -- - r } - -Brace Not >'-=—`---.� ''• Required 21-611 Maxi- �� f • r � . - - i . � tya . • .. :. _ �� ?{ FFINAL GRADE . 91_0" ! , CONCRETE_ FOUN®AYION: FOUNDATION • ••,M=':+.W:.,� Ih•:.w DEPTTI;D' iAI:e.Y. wM�.'E:d'.✓ f 1 t• � 1 � I .�:' � - 1511 S Y PIER. DIA ' Note: 21_0" The spacing of this section in the East-West direction shall be 12'-7" max. LOCATION MAP BUTTE COUNTY FEB 0 5 2018 DEVELOPMENT SERVICES 817-) eo* 6 SITE PLAN STEWART RESIDENCE SCALE: NOT TO SCALE NET METERED 5.225 KW PV -------------- T — ------- --- - - I PROPERTY LINE - 82.-1 I 78'-7 1 SCOPE OF WORK: 165' - INSTALL GROUND MOUNT RACKING AND MODULES I AV �f .%'Z®S - TRENCH AND RUN CONDUIT TO EXISTING SUB -PANEL - INSTALL PV COMBINER PANEL - INSTALL 30A 240V BREAKER IN EXISTING SUB -PANEL 236'-8" - INSTALL ENPHASE MICROINVERTRS ON MODULES - COMPLETE MODULE STRINGING AND WIRE RUNS FROM ARRAY TO SUB -PANEL DISCONNECT - INSTALL ADDITIONAL GROUNDING RODS AS NEEDED - INSTALL NEW PV PRODUCTION METER BASE ------------- -------------------PERMIT# DRAWN BY: CRTBUTTE COUNTY DEVELOPMENT SERVICES .....................................................................:......... REVIEWED FOR .............. ... DATE...7/1.9/17............................................ CODE COMPLIANCE ....... REVISION:..2/1/2018......................................... nn 2016 CRC, 2016 CBC, 2016 CFC, 2016 DATE ! I . ` BY J APPLICABLE CODE: CEC, 2016 CGBSC SYSTEM SPECIFICATIONS TABLE OF CONTENTS MODULE: (19) CANADIAN SOLAR CS6K-275M SITE INFORMATION P.1 COVER SHEET .................................................................................................................................................................................... MICROINVERTER ENPHASE 106 -60 -2 -US ADDRESS: 744 LAUB RD bu Uc8S10296 P.2 SITE PLAN .........................:............................................................................................... ROYAL AZIMUTH(S). 180° GRIDLEY, CA: 95948 P.3 MODULE LAYOUT ..................................................................................................... TILT(S) 25° PARCEL 021 230.061 HEATING AIR P.4 MOUNT/TRUSS DETAIL ■ ............................................................................................................. SOLAR ....................................... BUSBAR RATING: 125A JURISDICTION. BUTTE COUNTY P:5 ELECTRICAL SCHEMATIC MAIN BREAKER RATING 100A UTILITY: PG&E P.6 ELECTRICAL NOTES ATTACHMENT TYPE: IRONRIDGE GROUND MOUNT P.7 STICKERS/PLACARDS -r-I`I& --------------------- ------------------------I---------------------------- I I PROPERTY LINES • .. - 78'_7" ._ 10' VEGETATION 8'-2" FREE ZONE MAIN RESIDENCE O o................ ............. BARN lu TOOL SHED }g0 I (NON-PERMANENT. r•,�,t�:.i�+":.•f�'�:,'�_�r�•+:�.pa�t•��x,�,?^r:K'. I STRUCTURE) . (N) AC COMBINER BOX PV ARRAY GARAGE 165' ,1� 0Lfe.-1 I �0 LTRENCHED CONDUIT 125A SUB- PANEL SEPTIC TANK AND I S 4V ilrej ifor, T` LEECH FIELD i . 236'-8" PERMIT # 125A MAIN SERVICE BUTTE COUNTY DEVELOPMENT SERVICES & UTILITY ENTRANCE I REVIEWED FOR f CODE COMPLIANCE SITE PLAN I _ �BY______-- �- Z SCALE: 1' = 25' I DATE- - - - - 7 TABLE OF CONTENTS PV MODULE: (19) CANADIAN SOLAR CS6K-275M T FIRE CODE OFFSET SITE INFORMATION .1 COVER SHEET ' . ............................................................................................... ADDRESS: •.••.•INVERTER TYPE: MICROINVERTER ............ � ••••••• ••••••••••••••••••••••••••••• ............................................................................................. . . . . . . . . . . . . RES, : 744 LAUB RD u�asaoiae P.2 SITE PLAN INVERTER MODEL: ENPHASE IQ6-60-2-US .. ... . . . . . . .............. .. GRIDLEY, CA: 95948 �Y�� P.3.. MODULE LAYOUT , ............................:............. ............................ AZIMUTH(S): 180° .•....PARCEL#. 021-230.061...... ......•_.•. HEATING • AIR • SOLAR P.4 MOUNT/TRUSS•DETAIL• P■ 2 ' ""' JURISDICTION: BUTTE COUNTY P.5 ELECTRICAL SCHEMATIC TILT(S): 25° ................................... UTILITY: PG&E I P..6..ELECTR.ICAL.NOTES ...... ..................... .......: - P.7 STICKERS/PLACARDS 4 (N) PV MODULE. N MODULE LAYOUT L SCALE: 3/8." = 1' VERIFY ALL OBSTRUCTIONS IN THE FIELD. VERIFY ALL DIMENSIONS IN THE FIELD.' WHERE INDICATED ON PLAN, MIN. DIMENSIONS ARE REQUIRED PER, THE "SOLAR' PV INSTALLATION GUIDELINE" PUBLISHED BY THE OFFICE OF THE STATE FIRE MARSHAL. - EXISTING ROOF RAFTERS @ 24" O.C.'PER SITE SURVEY MEASUREMENTS. - PROVIDE RAIL SPLICES AS REQUIRED BY MANUFACTURER'S GUIDELINES. - NO SIGNIFICANT SHADING WILL RESULT FROM EXISTING ROOF OBSTRUCTIONS. - PV-MODULESCANNOT BE INSTALLEDOVER OR BLOCK -ATTIC VENTS, PLUMBING VENTS, FURNACEOR WATER HEATER VENTS ETC. SITE INFORMATION J_ ADDRESS: 744 LAUB. RD ................. ......... GRIDLEY, CA. 95948 ........... PARCEL #: ................. .............................................. 021-230-061 : JURISDICTION: : BUTTE COUNTY ................. .............................................. UTILITY: PG&E lid -T MIES P.1 COVER SHEET . uc 8510296 ROYALAIRM ....................................... P.2 SITE PLAN P..3.. MODULE LAYOUT LAYOUT ........... 4 MOUNT/TRUSS DETAIL - ........................................ ■ HEATINGP AIR SOLAR P.5 ELECTRICAL SCHEMATIC ................................ P;6.. EL.ECT.R.ICAL. NOTE.S. STICKERS/PLACARDS