Loading...
REVIEWED BLD2021-0037+Structural_Analysis_or_Calculations+1.8.2021_2.17.36_PM+1981323 INC 180 Nickerson St. Suite 302 Seattle, WA 98109 (206) 285-4512(V) (206) 285-0618(F) bmccann@ctengineering.com #20227 Structural Calculations For: SUNRISE OF LYNNWOOD RTU SUPPORT AT 21500 72nd Ave W Edmonds, WA 98026 Client: Evergreen Refrigeration & HVAC 727 S. Kenyon St. Seattle, WA 98108 Design Criteria: IBC 2015 Wind: Wind Speed = 110 mph, Kzt = 1.00 Seismic: Sds = .9 Roof Snow Load = 25 psf C T E N G I N E E R I N G 09/28/202012/23/2020 RECEIVED Jan 12 2021 CITY OF EDMONDS DEVELOPMENT SERVICES DEPARTMENT BLD2021-0037 REVIEWED BY CITY OF EDMONDS RTU TO BE REMOVED AND REPLACED WITH NEW. NO CURB ADAPTER.(E) 2X10 @24 " O.C.(E) PRIMARY BEAM LINESCT ENGINEERING PERFORMED A SITE VISIT ON DECEMBER 10TH, 2020 TO OBSERVE THE EXISTING ROOF FRAMING CONDITIONS. ONE SIDE OF THE EXISTING UNIT RESTS ON THE PRIMARY BEAM LINE AND THE REMAINDER OF THE UNIT SITS ATOP 2X10 JOIST. THE NEW UNIT IS LESS THAN 100 POUNDS HEAVIER THAN THE EXISTING UNIT AND DOES NOT INCREASE THE STRESSES IN THE EXISTING ROOF FRAMING MEMBERS BY MORE THAN THE ALLOWED 5%. WIND LOADS - EQUIPMENT (BLDG H < 60') ASCE 7-10 29.5-1 V 110.0 mph Kd 0.85 -Table 26.6-1 Kzt 1.0 - Kz 0.62 -Table 29.3-1 - Exp B qh 16.3 lb/ft^2 GCrh 1.9 - GCrv 1.5 - Unit dimensions - weight - horizontal and vertical projected areas (inches; pounds; inches^2) RTU L B hc H W-unit W-curb Af1 Af2 Af3 Af4 Ar RTU-1 69 4/5 44 2/7 14 41 747 100 2862 1815 977 620 3091 RTU-2 RTU-3 RTU-4 WIND LOADS - EQUIPMENT (BLDG H < 60') Moments about x-x Axsis @ E1: Wind forces - Overturning moment (lb-in) - Resisting Moment (lb-in) ASCE 10 2.4.1 #7 .6D+.6W - Uplift force (lb) RTU Fh1*(0.6)Fv*(0.6)OM RM Uplift - ASD RTU-1 370 315 14563 9923 105 RTU-2 RTU-3 RTU-4 Moments about y-y Axsis @ E1: Wind forces - Overturning moment (lb-in) - Resisting Moment (lb-in) ASCE 10 2.4.1 #7 .6D+.6W - Uplift force (lb) RTU Fh2*(0.6)Fv*(0.6)OM RM Uplift - ASD RTU-1 235 315 15815 15642 2 RTU-2 RTU-3 RTU-4 Moments about x-x Axsis @ E2: Wind forces - Overturning moment (lb-in) - Resisting Moment (lb-in) ASCE 10 2.4.1 #7 .6D+.6W - Uplift force (lb) RTU Fh3*(0.6)Fv*(0.6)OM RM Uplift - ASD RTU-1 126 315 20625 11252 212 RTU-2 RTU-3 RTU-4 Moments about y-y Axsis @ E2: Wind forces - Overturning moment (lb-in) - Resisting Moment (lb-in) ASCE 10 2.4.1 #7 .6D+.6W - Uplift force (lb) RTU Fh4*(0.6)Fv*(0.6)OM RM Uplift - ASD RTU-1 80 315 19661 17736 28 RTU-2 RTU-3 RTU-4 CONTROLING UPLIFT FORCE - STANDARD SEISMIC CLIPS SUFFICIENT. Trane Precedent Gas/Electric Packaged Rooftop Unit Overview - YSC036G3EMB**000000000000000000000000000 Application Unit Size Supply Fan External Dimensions (in.)Weight EER IEER/SEER DX cooling, gas heat 3 Ton (036)Airflow External Static Pressure Height Width Length Minimum Maximum 12.0 EER 1200 cfm 0.500 in H2O 3.41 ft 3.69 ft 5.82 ft 472.0 lb 747.0 lb Unit Features Unit Electrical Voltage/phase/hertz 208-230/60/3 MCA 19.90 A MOP 30.00 A Controls Unit Controls Electro mechanical controls 3ph Cooling Section Entering Dry Bulb 80.00 F Entering Wet Bulb 67.00 F Ambient Temp 95.00 F Leaving Coil Dry Bulb 57.21 F Leaving Coil Wet Bulb 57.21 F Leaving Unit Dry Bulb 58.99 F Leaving Unit Wet Bulb 57.90 F Refrigeration System Options Leaving Dew Point 57.21 F Capacity Gross Total 36.97 MBh Gross Sensible 29.79 MBh Net Total 35.94 MBh Net Sensible 28.76 MBh Fan Motor Heat 1.03 MBh Refrig Charge-circuit 1 3.2 lb Heating Section Heating Stages 2 Output Heating Capacity 81.00 MBh Output Heating Capacity with Fan 82.25 MBh Heating EAT 70.00 F Heating LAT 132.70 F Heating Temp Rise 62.70 F Fan Section Indoor Fan Data Type FC Centrifugal Drive Type Direct Indoor Fan Performance Airflow 1200 cfm Design ESP 0.500 in H2O Indoor Motor Operating Power 0.40 bhp Indoor Motor Power 0.30 kW Indoor RPM 918 rpm Indoor Fan FLA 0.00 A Outdoor Fan Data Type Propeller Fan Quantity 1 Drive Type Direct Outdoor Fan Performance Condenser Fan FLA 0.00 A Exhaust Fan Data Type FC Centrifugal Drive Type Direct Exhaust Fan Performance Exhaust Fan FLA 0.00 A Compressor Section Power 0.00 kW Circuit 1 RLA 0.00 A Circuit 2 RLA 1.10 A Job Name: GENSCO STOCK Prepared By: GENSCO STOCK Unit Tag: YSC036G3EMB00 Quantity: 1 2018-04-25 21:14:40Z Page 1 of 9 Job Name: GENSCO STOCK Prepared By: GENSCO STOCK Unit Tag: YSC036G3EMB00 Quantity: 1 2018-04-25 21:14:40Z Page 2 of 9 Job Name: GENSCO STOCK Prepared By: GENSCO STOCK Unit Tag: YSC036G3EMB00 Quantity: 1 2018-04-25 21:14:40Z Page 3 of 9 Job Name: GENSCO STOCK Prepared By: GENSCO STOCK Unit Tag: YSC036G3EMB00 Quantity: 1 2018-04-25 21:14:40Z Page 4 of 9 Job Name: GENSCO STOCK Prepared By: GENSCO STOCK Unit Tag: YSC036G3EMB00 Quantity: 1 2018-04-25 21:14:40Z Page 5 of 9 Job Name: GENSCO STOCK Prepared By: GENSCO STOCK Unit Tag: YSC036G3EMB00 Quantity: 1 2018-04-25 21:14:40Z Page 6 of 9 General The units shall be convertible airflow. The operating range shall be between 115°F and 0°F in cooling as standard from the factory for units with microprocessor controls. Operating range for units with electromechanical controls shall be between 115°F and 40°F. Cooling performance shall be rated in accordance with ARI testing procedures. All units shall be factory assembled, internally wired, fully charged with R-410A, and 100 percent run tested to check cooling operation, fan and blower rotation, and control sequence before leaving the factory. Wiring internal to the unit shall be colored and numbered for simplified identification. Units shall be cULus listed and labeled, classified in accordance for Central Cooling Air Conditioners. Casing Unit casing shall be constructed of zinc coated, heavy gauge, galvanized steel. Exterior surfaces shall be cleaned, phosphatized, and finished with a weather-resistant baked enamel finish. Unit's surface shall be tested 672 hours in a salt spray test in compliance with ASTM B117. Cabinet construction shall allow for all maintenance on one side of the unit. Service panels shall have lifting handles and be removed and reinstalled by removing two fasteners while providing a water and air tight seal. All exposed vertical panels and top covers in the indoor air section shall be insulated with a cleanable foil- faced, fire-retardant permanent, odorless glass fiber material. The base of the unit shall be insulated with 1/8 inch, foil-faced, closed-cell insulation. All insulation edges shall be either captured or sealed. The unit's base pan shall have no penetrations within the perimeter of the curb other than the raised 1 1/8 inch high downflow supply/return openings to provide an added water integrity precaution, if the condensate drain backs up. The base of the unit shall have provisions for forklift and crane lifting, with forklift capabilities on three sides of the unit. Unit Top The top cover shall be one piece construction or, where seams exist, it shall be double-hemmed and gasket-sealed. The ribbed top adds extra strength and enhances water removal from unit top. Filters Throwaway filters shall be standard on all units. Optional 2-inch MERV 8 and MERV 13 filters shall also be available. Compressors All units shall have direct-drive, hermetic, scroll type compressors with centrifugal type oil pumps. Motor shall be suction gas-cooled and shall have a voltage utilization range of plus or minus 10 percent of unit nameplate voltage. Internal overloads shall be provided with the scroll compressors. Dual compressors are outstanding for humidity control, light load cooling conditions and system back- up applications. Dual compressors are available on 7½-10 ton models and allow for efficient cooling utilizing 3-stages of compressor operation for all high efficiency models. Indoor Fan The following units shall be equipped with a direct drive plenum fan design (T/YSC120F,T/YHC074F, T/YHC092F,T/YHC102F, 120F). Plenum fan design shall include a backward-curved fan wheel along with an external rotor direct drive variable speed indoor motor. All plenum fan designs will have a variable speed adjustment potentiometer located in the control box. 3 to 5 ton units (high efficiency 3-phase with optional motor) are belt driven, FC centrifugal fans with adjustable motor sheaves. 3 to 5 ton units (standard and high efficiency 3-phase) have multispeed, direct drive motors. All 6 to 8½ ton units (standard efficiency) shall have belt drive motors with an adjustable idler-arm assembly for quick-adjustment to fan belts and motor sheaves. All motors shall be thermally protected. All 10 tons, 6 ton (074), 7½ to 8½ (high efficiency) units have variable speed direct drive motors. All indoor fan motors meet the U.S. Energy Policy Act of 1992 (EPACT). Job Name: GENSCO STOCK Prepared By: GENSCO STOCK Unit Tag: YSC036G3EMB00 Quantity: 1 2018-04-25 21:14:40Z Page 7 of 9 Outdoor Fans The outdoor fan shall be direct-drive, statically and dynamically balanced, draw-through in the vertical discharge position. The fan motor shall be permanently lubricated and shall have built-in thermal overload protection. Evaporator and Condenser Coils Internally finned, 5/16" copper tubes mechanically bonded to a configured aluminum plate fin shall be standard. Evaporator coils are standard for all 3 to 10 ton standard efficiency models. Microchannel condenser coils are standard for all 3 to 10 ton standard efficiency models and 4, 5, 6, 7.5, 8.5 ton high efficiency models. The microchannel type condenser coil is not offered on the 4 and 5 ton dehumidification model. Due to flat streamlined tubes with small ports, and metallurgical tube-to-fin bond, microchannel coil has better heat transfer performance. Microchannel condenser coil can reduce system refrigerant charge by up to 50% because of smaller internal volume, which leads to better compressor reliability. Compact all-aluminum microchannel coils also help to reduce the unit weight. These all aluminum coils are recyclable. Galvanic corrosion is also minimized due to all aluminum construction. Strong aluminum brazed structure provides better fin protection. In addition, flat streamlined tubes also make microchannel coils more dust resistant and easier to clean. Coils shall be leak tested at the factory to ensure the pressure integrity. The evaporator coil and condenser coil shall be leak tested to 600 psig. The assembled unit shall be leak tested to 465 psig. The condenser coil shall have a patent pending 1+1+1 hybrid coil designed with slight gaps for ease of cleaning. A plastic, dual-sloped, removable and reversible condensate drain pan with through-the-base condensate drain is standard. Controls Unit shall be completely factory-wired with necessary controls and contactor pressure lugs or terminal block for power wiring. Unit shall provide an external location for mounting a fused disconnect device. A choice of microprocessor or electromechanical controls shall be available. Microprocessor controls provide for all 24V control functions. The resident control algorithms shall make all heating, cooling, and/or ventilating decisions in response to electronic signals from sensors measuring indoor and outdoor temperatures. The control algorithm maintains accurate temperature control, minimizes drift from set point, and provides better building comfort. A centralized microprocessor shall provide anti- short cycle timing and time delay between compressors to provide a higher level of machine protection. 24-volt electromechanical control circuit shall include control transformer and contactor High Pressure Control All units include High Pressure Cutout as standard. Phase monitor Phase monitor shall provide 100% protection for motors and compressors against problems caused by phase loss, phase imbalance, and phase reversal. Phase monitor is equipped with an LED that provides an ON or FAULT indicator. There are no field adjustments. The module will automatically reset from a fault condition. Refrigerant Circuits Each refrigerant circuit offer thermal expansion valve as standard. Service pressure ports, and refrigerant line filter driers are factory-installed as standard. An area shall be provided for replacement suction line driers. Job Name: GENSCO STOCK Prepared By: GENSCO STOCK Unit Tag: YSC036G3EMB00 Quantity: 1 2018-04-25 21:14:40Z Page 8 of 9 Gas Heating Section The heating section shall have a progressive tubular heat exchanger design using stainless steel burners and corrosion resistant steel throughout. An induced draft combustion blower shall be used to pull the combustion products through the firing tubes. The heater shall use a direct spark ignition (DSI) system. On initial call for heat, the combustion blower shall purge the heat exchanger for 20 seconds before ignition After three unsuccessful ignition attempts, the entire heating system shall be locked out until manually reset at the thermostat/zone sensor. Units shall be suitable for use with natural gas or propane (field-installed kit) and also comply with the California requirement for low NOx emissions (Gas/Electric Only). Job Name: GENSCO STOCK Prepared By: GENSCO STOCK Unit Tag: YSC036G3EMB00 Quantity: 1 2018-04-25 21:14:40Z Page 9 of 9 INC 180 Nickerson St. Suite 302 Seattle, WA 98109 (206) 285-4512(V) (206) 285-0618(F) bmccann@ctengineering.com #20227 Structural Construction Documents For: SUNRISE OF LYNNWOOD RTU SUPPORT AT 21500 72nd Ave W Edmonds, WA 98026 Client: Evergreen Refrigeration & HVAC 727 S. Kenyon St. Seattle, WA 98108 Design Criteria: IBC 2015 Wind: Wind Speed = 110 mph, Kzt = 1.00 Seismic: Sds = .9 Roof Snow Load = 25 psf C T E N G I N E E R I N G 09/28/202012/23/2020 RTU TO BE REMOVED AND REPLACED WITH NEW. NO CURB ADAPTER.(E) 2X10 @24 " O.C.(E) PRIMARY BEAM LINESREFERENCE DETAIL A NEXT SHEET FOR ANCHORAGE REQUIREMENTS. Sunrise of Lynnwood 12/23/2020