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Specifications / te2oz08"- co3 750 / 5-J a,d L v , • Structural Calculations for Seismic Connection of Roof top Mechanical Units for WinCo - Tigard Project located in: Tigard, Oregon for Reliable HVAC Inc. 6600 NW Whitney Rd, Suite C Vancouver, Washington 98665 fkv C ruR G ' ° r James G. Pierson, Inc. 1 . - , .,• go 10:�w � �q A. GG • James G. Pierson, Inc. Consulting Structural Engineers 320 S.W. STARK SUITE 535 PORTLAND, OR. 97204 (503) 226 -1286 FAX 226 -3130 September 2008 Seismic Design Forces on Mechanical Units Task: Determine the lateral forces (seismic) and required connections for roof top mechanical units installed on a wood framed or steel roof structures. The vertical adequacy of the structure for the weight of the mechanical unit, resulting snow drift, and other dead and live loads is beyond the scope of this lateral analysis and unless specifically noted in • other sections of this calculation package is the responsibility of others. References: 2006 IBC (2007 OSSC) Section 1621 - Architectural, Mechanical and Electrical Component Design Requirements ASCE 7 -05 Section 13.6 for mechanical components and systems Criteria: Seismic Design Category D, Component Importance Factor Ip = 1.00 SDS = 1.1 or less (covers all of Oregon/Washington and will be conservative for most jurisdictions. For instance, for Portland, Oregon Sds = 0.75 Application of OSSC Requirements: Section 13.3.1 - Seismic Forces Total design F = 0.40 RS I ( 1 + 2 h I W lateral force: p DS p / Eq. 13.3 -1 F > 0.3S p p p I W F and < 1.6S p W p p Except that: Eq. 13.3 -2, -3 Table 13.6 -1 - Horizontal Force Factors, a and R HVAC systems. - a = 1.0 and R = 2.5 Load Combinations - Members and the connection design shall use the load combinations and factors specified in Section 2.3.2. The reliability /redundancy factor may be taken as 1.0 and Fp is substituted for QE. • Overturning check - continued: Assume Center of gravity of unit and curb is located at center of height. The following forces apply to allowable stress stability calculations using Equation 16 -18 as modified for Qe Unit - 0.68 D = .68 (5100) = 3468 lbs E = 26951bs Curb - 0.68 D = .68 (550) = 374 lbs E = 290lbs MECHANICAL UNIT 64° 1150 1..135 4590 LB5 ROOF 12° 190 L55 495 LB5 C/C FLANGE BEARING Compute Stability about bottom of curb Overturning Moment = 2695 lbs x 44" = 118,580 in -lbs 290 lbs x 6" = 1,740 in -lbs Total Overturning Moment = 120,320 in -lbs Restoring Moment = (3468 lbs + 374 lbs) x 43" = 165,206 in -lbs Safety Factor Against Overturning = 165,206 / 120,320 = 1.37 From this calculation, it is demonstrated that a typically proportioned mechanical unit is ordinarily stable against overturning without benefit of hold down anchors. Overturning will generally not be a problem unless the height of the unit is greater than two times the width. • • Overturning check - continued: The prior calculations show appropriate formulas for calculating seismic forces of rigidly attach roof top mechanical units which can be summarized as: Strength design FP 0.528 W, Working Stress = E /1.4 Thus, using working stress methods, the horizontal force to be resisted by positive mechanical connections (NO FRICTION) is finally equal to 0.528/1.4 = 37.7% of unit + curb weight. It has been illustrated that overturn stability is usually not a problem & need not be specifically investigated until the height of the unit exceeds its width by more than two times. Base connections provided for horizontal forces will generally be effective in resisting overturning forces & can add to stability of taller units. • Example of unit with height = 2 times width: Unit weight = 1000 lbs • Curb weight = 100 lbs 54- Overturning Moment: (37.7 lbs)(6 ") +(377 lbs)(56 ") = 21,338 in -lbs MECHANICAL UNIT Restoring Moment: (using 0.68D) (680 lbs + 68 lbs)(25 ") = 18,700 in -lbs 343 LBS soo LBS In this example, the unit requires connections to resist overturn moment of: 21,338 - 18,700 = 2,638 in -lbs. ROOF Since the base width is 50 inches, a connector 12" < 34.3 LB5 which provides 100 lbs of tensile strength will eo LBS provide an overturn resistance of: C/C FLANGE BEARING 100 lbs x 50" = 5,000 in -lbs Thus, a single 100 pound connection is sufficient to provide stability against overturn • Base Connection From Curb to Roof Diaphragm: For typical roof top units, seismic attachment becomes a relatively simple matter of making a positive connection from the standard steel channel curb into the roof diaphragm system. For a wood roof system, it will ordinarily be more convenient to use working stress values for connector designs. Generally it will not be necessary to go beyond the connector (screw or lag) design as the relatively small horizontal forces can be absorbed by the roof diaphragm. Most mechanical curbs come pre - punched for base screw of lags, and many mechanical subcontractors will habitually use lag screws for this attachment. Often these lag screws are found to be 3/8" diameter, apparently stemming from standard plumbing/mechanical braces & brackets fabricated for "SMACNA" standard applications. The use of 3/8" diameter lags is unnecessary (but certainly acceptable) and smaller connectors are also acceptable. Examples of Suitable Connectors: • Simpson SDS 1/4 x 2 screw Shear Capacity in D.F. 303 lb with 10 gage side plate 327 lb with 3 gage side plate 2002 NDS 1/4" Dia. Lag Screw G = 0.49 D.F. Z = 220 lb ZpERp.= 160 w /10 gage plate Z = 260 lb ZpERp.= 190 w/3 gage plate 2002 NDS #14 Gage Cut Thread Wood Screw D = 0.242 G = 0.49 D.F. Z = 1821b w /10 gage plate Z = 221 lb w/3 gage plate The lowest value found above is 160 lbs for perp. to grain installation of 1/4" diameter lag. For seismic shear this value would be 1.33(160 lbs) = 213 lbs . Thus it seems prudent to construct a table using a conservative value of 150 lbs per connector, • to allow for any imperfections of connection installation such as minimal penetration or edge • • distances, and base the table on the following screws or lags. #14 x 2 -1/2" Cut Thread Wood Screw 1/4" Dia. x 2 -1/2" min. Standard Lag Screw Simpson SDS 1/4" x 2 -1/2" Hex Head Wood Screw • • • • Design Lateral Force: Fp= 0.40a Sds 1p /Rp[1 +2z/h]Wp = 0.528Wp Fp need not exceed 1.6 Sds Ip Wp = 1.76 Wp Fp shall not be less than 0.3 Sds Ip Wp = 0.33 Wp The design will be controlled by Fp = 0.528 Wp Overturning: Overturning will be controlled by Equation 2.3.2 -7 of the Basic Load Combinations for Strength Design which is: 0.9D +E In this equation, according to ASCE 7 the value of E shall include E= pQe- 0.2SdsD= 1.0Qe - [0.2x 1.1 xD] = Qe -0.22D Therefore, when substituting Qe Equation 16 -18 becomes 0.68 D + E Continue with a generic Working Stress Method overturning analysis using a York unit (Y14ACO4N2KDCCB) to illustrate specific aspects of design. This unit may not be used on this particular project but is used to investigate overturning issues. By inspection, overturning is more critical in the width of the unit as the unit is more than twice and long as wide. The design calculations are therefore: Weight of unit with accessories is 5100 lbs = Wp Seismic Force of unit Fp = 0.528 Wp 2693 lbs Weight of standard curb (estimated) 550 lbs = Wp Seismic Force of curb Fp = 0.528 Wp 290 lbs • • o® 0 4 4 0 0 0o c I I I I I I I I 1 1 i o Di O - - t ^: ^;iry;. -y, „.,..7. -: i% ± ? ? g c {n , — .... — - _ _ _ 4. (:i:: %: ' iJ* %•:..L• •: : •:.•:: ;: 1::. .. (..... :.L•i •:::.; .. q p .. � ..., ., .,1. , !. , % ; i; , yy� ry i ii n i; ! i : : ; ; :� 1-': • : ::' . � � ; : ! ' .. : .. ..- •:. � l.1:•:;:•9S i: .. :! : .: -- . :: ,! {;: l i:i ; ; i; %!.; : i':: !. •_ :.; i : E90' ::: -. - i ::•: •i ::J. ££ '`99V :• ::• • i•.-.:--:i %. .. (i(ae, • .- .• y: F .. gee - -.._ . 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R- 410A,R -22 Item: B1 Qty: 1 Tag(s): RTU -2 (_ . • B • • W3 W6 • W ����il��'�rir ;, ►''`1 W2 W IRZ..\,- � :1111;► ', - .. Ili �,, i ij•� 1 %� ' FLUE HOOD W4 W5 CENTER OF GRAVITY • UNTT WEI HT CORNER'WEIGHT CENTER OFGRAVnY SHIPPING NET W1 W2 W3 W4 • W5 W6 A B 481.0 b `885A 1b 710.0 b 175.0 b 81.0 b '129.0 lb '107.0 lb . 68.0 11) 22' 25 CLEARANCE TO COMBUSTIBLE MATERIAL RECOMMENDED SERVICE CLEARANCE BOTTOM 0 UNIT WITH OA. DAMPE3i/ECON. WITH 2 POS. DANDER BACK SIDE 1' BACK SIDE I? 24• • LEFT SIDE 6' LEFT SIDE 36' 42' RIGHT SIDE 8' RIGHT SIDE 42' FRONT SIDE 1? FRONT SIDE 42' TOP 36' r i FLO = Furnished by Trane / Installed by Others Trane Equipment Submittal Page f9 of 24 • Winco May 27, 2008 Weight, Clearance & Rigging Diagram - Packaged Rooftop, Cooling I Heating Units Item: Al Qty: 1 Tag(s): RTU -1 • t 44 04 • )10 . ..• •: am/ /� Ilk; 134 .>,,,,,...," . CLEARANCE NOTES: 1. HORIZONTAL AND DOWNFLOW UNITS. 4B, ALL SIZES. • 2. CONDENSER COIL IS LOCATED AT THE I i END AND SIDE OF THE UNIT. .. 72- • 96' —1 3. CLEARANCES ON MULTIPLE UNIT INSTALLATIONS ARE DISTANCES BETWEEN UNITS. 4. ECONO / EXHAUST END MULTIPE - UNITS 144'. I 5. CONDENSER COIL END/SIDE 197 TO _ L I 6. SERVICE SIDE ACCESS 96 - C � I 48' :0 7/16" — —1 • VT. y .44 5 I -- 1 -- -- -- J BASIC UNIT WEIGHT 4 075.0 l . OPTIONAL COMPONENTS CORNER WADING PERCENTS POWER DWAUST /' ` BARO. RELIEF '110.0 m SERVICE VALVES 18.0 lb --) A 0 C D E F ECONOMIZER ( 260.0 lb ` TNRU -BASE ELECTRICAL HI-OFF SUP. FAN 21 22 12 18 17 12 MANUAL DAMPERS ` • J GFI WITH DISCON. SWITCH ' DISC. SWITCH INLET GUIDE VANES HI-EFF COND COIL V.FD ' WEIGHT NOTES: . 1. BASIC UNIT WEIGHT INCLUDES MINIMUM HORSEPOWER SUPPLY FAN MOTOR AND STANDARD EFFICIENCY 2 -ROW CONDENSER COIL. 2. OPTIONAL HIGH EFFICIENCY MOTOR WEIGHTS ARE IN ADDITION TO THE STANDARD MOTOR WEIGHTS INCLUDED IN THE ASIC UNIT WEIGHT 3. OPTIONAL HIGH EFFICIENCY 3-ROW CONDENSER COIL WEIGHTS ARE IN ADDITION TO THE STANDARD 4. 2-ROW COIL WEIGHT INCLUDED IN THE BASIC UNIT WEIGHT 5. WHEN AN OPTIONAL HIGH EFFICIENCY SUPPLY FAN MOTOR IS SELECTED, THE WEIGHT SHOWN SHOULD BE ADDED TO THE BASIC UNIT WEIGHT. 6. WHEN AN OPTIONAL HIGH EFFICIENCY CONDENSER COIL IS SELECTED, THE WEIGHT SHOWN SHOULD BE ADDED TO THE BASIC UNIT WEIGHT. 7. THE ACTUAL WEIGHT IS STAMPED ON THE UNIT NAMEPLATE. 8. THE WEIGHT SHOWN REPRESENT THE TYPICAL UNIT OPERTING WEIGHT FOR THE UNIT SELECTED . 9. DESIGN SPECIAL WEIGHT ARE NOT INCLUDED IN THE SUBMITTAL. I • . RD = Furnished by Trane / Installed by Others .. Trains Equipm Submittal - Page 10 of 24 • . a . . uuu; NNECTION NIT t0 FASTENECH ?IONCATION P TS OF ROP UNIT ER BUT NSS ROOF . ATTACHMENT • VZ 1 HVAC UNIT PRE -FAB CURB BY • r ` . • 0, uvu NAILER CONNECTION OF STEEL 0 v� \./ u FLASHI CHANNEL CURB TO STEEL ROOF v \/ DECK. SEE SCHEDULE BELOW 5 u v v . AND UNIT MANUFACTURERS / RIGID INSULATION • RECOMMENDATIONS. % \/v u DISTRIBUTE SCREWS EQUALLY 0 v v AROUND PERIMETER OF CURB / \./ \/ \./ ROOFING - SEE ARCH \/ v \/ CANT ST - SEE ARCH NOTE: • COORDINATE EXACT % v DETAIL WITH HVAC UNIT \/ \./ \/ MANUFACTURER 0 v v v �1 vuu BLOCK MATERIAL FOR i u v \.../ ADDITIONAL SUPPORT IF v v DRAWINGS ROOF DECK REQUIRED. SEE STRUCTURAL RAWINGS r '• ∎�� ROOF FRA MEMBER MAXIMUM WEIGHT OF HORIZONTAL SEISMIC MINIMUM NUMBER OF MECH. UNIT • CURB FORCE GENERATED SCREWS FROM D DECK (POUNDS) (POUNDS) • • 1000 343 4 1500 514 6 • 2000 686 6 • 2500 851 8 • - 3000 . 1029 . - 8 • • . - 4000 1311 . • 10 . 5000 1114 12 6000 2051 . 15 CONNECTORS ARE TO BE INSTALLED THROUGH THE BOTTOM FLANGE OF THE STEEL CURB SECTION AND INTO THE STEEL ROOF DECK. VERTICAL SUPPORT OF THE WEIGHT OF THE MECHANICAL UNIT IS A SEPARATE CONSIDERATION, AND SHALL BE PROVIDED FOR BY ARRANGEMENT OF ROOF STRUCTURAL FRAMING NOT SHOWN SPECIFICALLY BY THIS TABLE OR DETAIL APPROVED CONNECTORS INCLUDE THE FOLLOWING. $10 SELF TAPPING SCREWS • SEISMIC . CONNECTION ROOFTOP .MECH. UNITS • { - /%G <e200 0-c . •`'e - -c: Y == Air Commodities /Oregon. . • , A DIVISION OF AIR COMMODITIES INC. HEATING • VENTILATING • AIR CONDITIONING EQUIPMENT .t :. - - ys T'C :4 - :;1 1, 5 '. .-':; ' t ^. .1:f. 1:. ., • :�: �,,. : £.:K t- _ ._;4.' tit PROJECT: r� :" e fr i ▪ 0 te a. a ',f'1 . 't:::i t` r� '� ' }.. '-' Gez ."3 :. - :i_'�'i7:':; . , : e ; : ' . sG PR OfD ' ECT: a l ' r X� Mp » 17 c_�"; v 4.. Yif. '� =':{ :�F'_�i: • _^' y i a_.= ' r•: ' .Y ;[ n. ti -a te':: �.� . .. f_ , . .` : : ! ;v ? .\+''. µ,::_wi .,f: a . 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'.. tie ♦sr"1 VAkigiA.,r,.:;.'_.•: .� .... , ,...:_ �'.,: ' ^i '� j F .fit'i, =C`�': q .+r1; :1:• ,`l C�i �. - _ ?a :; 1: , ' .' ITEM SUBMITTED: L' 3'It � 7 � y �T g� :: f : :. :: _ ��ii.. .�4(pp �� ] 11 MA. ' - i i;.::::�:t! 5 Wit:::: >::: 1P,'�ir ...) ' i .4.- i+CW ll.^.•f . n- m7d,'- -t4,- - n:kr'3.:5:`•i, :;': I'•:"i: �r .. . -. ,,.,, ' . s: i::5i�i• 'i rit. ( .. ▪ ” ` MANUFACTURER: REZNOR of c ' 'ice,'. 'iNG {: l ' "" ”' ::, {please see attached literature} ., : G ; s,. .r:. ; .Ivl1`. .'.. 4.-.0.7.,.t.,.-*: rJ' .• ^.i J J i I' =r �l J-• •.- ...) 1500 N.E. SANDY BOULEVARD, PORTLAND, OR 97232 — (503) 238 -6900 FAX: (503) 238 -8764 1- 800 -575 -2473 • 4 • Unit Schedule Ext. Voltage . Line _ Reznor MBH Fuel Fan SP & No. Qty Unit Tags Model-Size Output Type HP RPM CFM °WC Phase Unit Notes 1 2 UH -1 & UH -2 EGHB-20 0 0 0 • Unit Notes: 1) 2) 3) 4) 5) Y Date: 06/24/2008 Job Name: WINCO Location: ,, Unit Tag: UH -1 & UH -2 EGHB-20 electric prop fan unit heater, horiz (all kw) or down discharge (up to 30 kw), i fan motor, mtg brackets AK7E 480/3 voltage IC11 Internal Thermostat w /Adj Dial The bill of material above Is all that is being submitted for acceptance. Supporting pages attached may have other options not Included in the fisting above. They are not being offered for this submittal. r L:A �.s ;.i.)�._ �-`sT ,y].'f;: �1:.�. ..- - ' �;'r%c' i :-.t `'�^.: 4.1 .;•. - r z ' - • ; 7 -..ci - • = 5 ie5}a:,i :G ' i : F.. . at;_ ' •::: c . -'l . r::+ ,: Fac - -_"4 Tx` c-i'*r` - M1.743 <.::.. Ss • 1:�--es :. - rs .-'�;i4 -:..: f` :i 3 �"..-._-. F.; . r. f ". .�,,:...- . 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" •�'•t ~ .. = 3 Y i.: . , ^a:'L]:�Ect. d.� R S "`�faTi�1 ^wS ..J T 12iL'� +� �� tin. .L= e .�4.: , ��_• „ 1: :1F7[:. ^ - Y�.LL. w - A ' '� - i *yam s 7, : 1a : gip = r. Ce • • • - showroom warehouse stairwell factory - i Features Color - Standard: almond. - - Finish - Standard: epoxy /polyester powder paint Voltage - 208V, 240V, 277V, 347V, 480V, 600V, 1 or 3- phase. Construction - 18 and 20-gauge steel. - Adjustable louvers to direct air flow. - High -limit temperature control with automatic reset • _ Fan • Motor mounted in cold compartment - Thermally - protected motor. - Totally enclosed and factory- lubricated ball bearing motor (except for 15 to 25 kW at 208V/240V). - 58 dBA fan (2 -10 kW), 67 dBA fan (15 -30 kW) and 77 dBA fan (40-60 kW). - Fan delay purges heater of residual heat Heating element - Durable tubular heating elements; stainless steel (2 -10 kW); finned (15 -60 kW). - Concentric disposition of heating elements. Control - All models have a factory- installed contactor. - 208V /240V control circuit standard (with transformer if necessary). - Also available with 24V relay, with or without transformer. - Optional built -in thermostat - 120V control circuit available. - Installation - Horizontal wall or ceiling mounting using 1 of 2 - supplied brackets which allow 360' rotation'. - - Vertical mounting using 4 threaded rods 1/2 in. X 13 UNC (not included). - Diffuser cones available. - Large and easily accessible control compartment - Maximum recommended height (horizontal): 2 -10 kW: 8 ft. (2.4 m); 15 -30 kW: 10 ft (3 m); 40-60 kW: 15 ft (4.5 m). - Protective screen allows lower mounting height (except 40-60 kW). - Minimum height of 8 ft. 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''. • . . • ' . . • • . .. • . • 40rfrPo'',4diti i... •-••• -•:---. .- - .. • ••• • " . . • • ' . •• .•• ..•..• . .. • . • . '' ''' ir'sk-R gliwrP ss ;.... :_• , • • : ... : .' - • -.... - • . • - - ... . . .. .. s,s!,4 t s e....stan,i-i,s.,si ': •-• • -- -- • - : .- • ' .. • - ' • • .. • • • • ., si4stisOls.1,5i_isisgi; .... .s•••••• : • •••••• • • • - -i hIst:ORtil.. ' ' I . ■-..,••• . ..._.,/ . • . . ... [Page Too Large for OCR Processing] [Page Too Large for OCR Processing] [Page Too Large for OCR Processing] 1 k,,V C 2wcc '3:),c) City of Tigard, Oregon • 13125 SW Hall Blvd. • Tigard, OR 97223 July 1, 2008 1111 s RE: MECHANICAL TI T I GARD Proiect Information Building Permit: MEC2008 -00320 Construction Type: 2 -B Tenant Name: lame St.° Occupancy Type: M Address: 7501 SW Dartmouth Rd. Occupant Load: 2269 Area: NA Stories: 1 The plan review was performed under the State of Oregon Mechanical Specialty Code (OMSC) 2007 edition; and the State of Oregon Fire Code (OFC) 2007 edition. The following corrections need to be submitted for review prior to issuing of the permit 1) Provide structural drawings showing all connectors, design and calculations for seismic connections of RTU's to curb and curb to roof . 2) Provide calculations for design of roof framing for support of vertical loads from RTU's. When responding, provide an itemized letter stating in what way each numbered issue has been addressed in the revision. When submitting revised drawings or additional information, please attach a copy of the enclosed City of Tigard, Letter of Transmittal. The letter of transmittal assists the City of Tigard in tracking and processing the documents. Respectfu , an Nelson, Senior Plans Examiner (503) 718 -2436 dann ©tigard- .or.gov Phone: 503.639.4171 • Fax: 503.684.7297 • www.tigard- or.gov • TTY Relay: 503.684.2772