SECTION 14610 BRIDGE CRANES
PART 1 GENERAL
1.1 SECTION INCLUDES
A. Bridge cranes complete with trolleys and hoists.
1.2 REFERENCES
A. ANSI Code B30, 16 - Overhead hoists.
B. Hoist Manufacturers' Institute (HMI):
1. HMI-100-74 - Standard Specifications for Electric Wire Rope Hoists.
C. Crane Manufacturer's Association of America, Inc. (CMAA):
1. CMAA-70 - Specifications for Electric Overhead Traveling Cranes.
2. CMAA-74 - Specifications for Top Running and Under Running Single Girder Electric Overhead Traveling Cranes.
D. Monorail Manufacturer's Association (MMA):
1. Specifications for Underhung Cranes and Monorail Systems.
1.3 DESIGN REQUIREMENTS
A. General Requirements:
1. Design stresses and safety factors in accordance with CMAA and MMA specifications.
B. Detailed Requirements:
1. Provide complete trolley and hoist systems as scheduled below for installation on the monorails where shown on the Drawings.
2. Tag No.: M-60-101-1.
3. Building: Biosolids Drying Building.
4. Location: Dryer Room.
5. Capacity, (ton): 2.
6. Span, (ft): 58.
7. High Hook Elevation, (ft): 677.25.
8. Operating Floor Elevation, (ft): 648.25.
9. Lowest Hook Elevation, (ft): 631.75.
10. Electrical Requirements: Non-Rated.
11. Hoist: Motorized.
12. Trolley: Motorized.
13. Bridge: Motorized.
1.4 SUBMITTALS
A. Shop Drawings: Submit data under provisions of Division 1, including the following:
1. Complete assembly and installation drawings.
2. Descriptive information on material and equipment furnished.
3. Electrical data.
4. All shop drawings relating to track system design and suspension shall be stamped by Professional Engineer registered in the State of Wisconsin.
B. Furnish operation and maintenance manuals under the provisions of Division 1.
C. Submit certificates of proper installation and operator training under the provisions of Division 1.
1.5 DELIVERY, STORAGE AND HANDLING
A. Deliver, store, and handle the equipment under the provisions of Division 1.
1.6 QUALITY ASSURANCE
A. Design and fabricate hoists, trolleys, and crane bridges in accordance with applicable requirements of HMI 100, CMAA 70, CMAA 74, MMA, and OSHA.
B. Proportion parts of mechanisms for stresses that occur during continuous operation, during fabrication, and during erection.
PART 2 PRODUCTS
2.1 ACCEPTABLE MANUFACTURERS
A. Electrolift Inc., Clifton, New Jersey.
B. P&H Morris Material Handling, Milwaukee, Wisconsin
C. R&M Materials Handling Inc., Springfield, Ohio.
D. Or Equal.
2.2 GENERAL
A. All equipment shall be the end product of one hoist and monorail system supplier. The supplier shall be responsible for the complete system including all items covered herein.
2.3 METAL FABRICATION
A. Fabricated metal parts described herein shall conform to Section 05500.
B. Anchor bolts, fasteners, nuts, and washers: 316 stainless steel.
2.4 EQUIPMENT
A. Trolley:
B. Provide trolley as scheduled.
1. Service Class: Class A2 per MMA Specifications.
2. Match capacity of trolley to the capacity of hoist.
3. Trolley type: Single rail to suit crane girder and compatible with hoist supplied under this section.
4. Trolley Frame:
a. Construction: Welded steel, cast steel, or ductile iron.
b. Prevent a drop of more than 1 inch in case of axle failure.
c. Type: Four wheel.
5. Hand-Geared Trolleys:
a. Chain sprocket mounted on the trolley drive shaft.
b. Drive the trolley wheels through a gear and pinion or spur gear arrangement.
c. Chain loop between 4 and 5 feet above the operating level.
6. Motorized Trolley:
a. Trolley operating speed: 25 to 50 ft/min.
b. Fabricate steel side plates and fit with safety lugs and bumper plates.
c. Drive a minimum of two of the four wheels.
d. Provide build-in travel brake.
7. Wheels:
a. Construction: Rolled or forged steel with treads and flanges heat treated, or cast iron wheels with chilled tread.
b. Minimum tread hardness: 425 Brinell.
c. Bearings: Ball or roller.
d. All clearances, wheel loads, and manufacturing tolerances shall be in accordance with MMA Specifications.
8. Wheel Axles:
a. Alloy steel.
b. Accurately machined.
9. Gears:
a. Helical, spur, or herringbone type.
b. Made from rolled or cast steel.
c. Machine cut teeth.
d. 20-degree pressure angle.
e. Ratings shall be in accordance with AGMA Standards, as described in MMA Specifications.
10. Bearings:
a. Combination radial and thrust type.
b. Double-row, angular contact ball bearings, or single-row tapered roller bearings.
c. Prelubricated and sealed.
11. Trolley Brakes:
a. For the motion concerned.
b. Rated torque capacities as specified in MMA Specifications.
12. Provide stops for the trolleys.
C. Crane Bridge
1. Provide a Class A1 crane bridge underhung, single girder unit.
2. Capacity of crane bridges to match capacity of hoists.
3. Wheels: Compatible with monorail.
4. Provide wheel stops at each end to resist impact forces of fully loaded carrier travelling at 50% of rated full load speed.
5. Design girders to resist both vertical and horizontal forces.
6. End trucks:
a. Welded construction with forged high carbon steel wheels mounted on antifriction bearings.
b. Equip end trucks with shock absorbing bumpers and safety lugs.
7. Electrically Operated Trolleys:
a. Operating speeds: 40 to 60 ft/min.
b. Directly connect drive motor through gear reduction to drive wheels.
c. Provide electric brake on bridge drive.
8.
Hand-Geared Trolleys:
a. Chain sprocket mounted on the trolley drive shaft.
b. Drive the trolley wheels through a gear and pinion or spur gear arrangement.
c. Chain loop between 4 and 5 feet above the operating level.
D.
Hoist: 1.
Type: Electric wire rope hoist.
2.
Service class: Class H1 per HMI Specifications.
3.
Lifting rate: 10-15 ft/min.
4.
Provide load blocks, hooks, and sheaves.
5.
Provide dual hoist braking.
6.
Include capacity limit switches to prevent overloading.
7.
8.
Provide adjustable upper and lower safety limit switches for extreme hook
positions.
Construct the rope drum diameter to not less than 24 times the diameter of the
9.
hoisting cable.
Groove the rope drum receive the full lift of the hoisting cable without
10.
overlapping.
Size the rope drum of sufficient size and length so at least two turns of the
11.
hoisting cable remain on the drum with the hook in its low position.
Provide extra flexible, improved plow steel wire rope made especially for hoist
12.
service.
Gearing: Combination helical and spur cut teeth, heat treated, running on
antifriction bearings in oil bath lubrication or permanently lubricated bearings
with splined shafts.
E. Lubricate parts and components such as gear boxes and bearings prior to shipment.
F. Motors:
1. Non-Rated: Provide TENV, 230/460 volt, 3 phase, 60 Hz, squirrel cage, intermittent duty type, with rating of not less than 30 min, 55 ? C rise.
2. Class 1, Division 1: Provide explosion proof NEMA 7, 480 volt, 3 phase, 60 Hz, squirrel cage, intermittent duty type, with rating of not less than 30 min, 55 ? C rise.
2.5 MARKING
A. Permanently mark capacity of hoist, trolley, and bridge on hoist, trolley, and bridge.
2.6 FINISHING
A. Shop and field painting as specified in Section 09900, System No. 5. Verify compatibility of factory and field coats.
2.7 ELECTRICAL EQUIPMENT
A. Furnish all electrical equipment, including motors, motor starters, and controls. All wire on the equipment shall be furnished by the manufacturer, cut to length and installed, as far as practical, before shipment.
B. The electrical equipment shall be in accordance with Division 13, Division 16 and National Electrical Code.
C. Provide as a minimum all electrical equipment as NEMA 12, provide NEMA 7 explosion proof electrical equipment in Class 1, Division 1 areas.
D. Festoon Cable:
1. Flat type.
2. Cable and supports shall be capable of storing in a space of not more than 10 percent of the overall monorail length.
3. Locate power feed on the West wall of the Dryer Building.
E. Handheld Crane Radio Remote Controls:
1. Furnish handheld crane radio remote control with pushbutton type station with momentary contact pushbuttons.
2. Unit shall remotely operate all overhead bridge crane operations..
3. Provide two remote controls, mobile hydraulic equipment, and other industrial machinery (2) hand-held remote transmitters with carrying straps and vinyl slip covers and one (1) pre-wired receiver unit with six feet of cable.
4. Construct hand-held remote transmitter enclosure of high-impact rubber or steel.
5. Provide control of all motions plus emergency "Stop" button that will disconnect power to all motor circuits.
6. Furnish "Start" button as reset.
F. Furnish control panels complete with the following features:
1. Control crane, hoist, and trolley motions by means of magnetic contactors supported on shockproof mountings.
2. Furnish magnetic main contactor for power circuit disconnect with control from emergency Start-Stop buttons in pushbutton station.
3. Provide under voltage protection.
4. Disconnect all motors on power failure.
5. Provide magnetic reversing type starters.
6. Acceleration Control of Trolley Motors: Soft starting characteristics with any load and gentle acceleration throughout cycle.
G. Provide wiring on bridge and trolley utilizing neoprene type SO cables running through rigid conduit whenever possible for adequate protection.
H. Provide safety enclosed rigid bar conductor system for travel length of crane with accessories such as conductor bars, spring actuated collector shoes, hangers and mounting brackets required for operation hoist, trolley, and bridge.
PART 3 EXECUTION
3.1 INSTALLATION
A. Install in accordance with the Drawings, shop drawings, and manufacturer's instruction.
B. Lubricate as required.
C. Verify clearance required for installation of equipment services and hoist, trolley, and crane bridge selected with equipment manufacturer before installation of hoist, trolley, crane bridge, and conductor system.
3.2 MANUFACTURER'S SERVICES
A. Provide manufacturer's services under provisions of Division 1.
B. Minimum Service Requirements:
1. Installation: As required for proper installation.
2. Start-up and field testing: One half day on site.
3. Operator training: One half day on site.
C. Service to Repair Defective Work: Provide during one-year warranty period under the provisions of General Conditions.
END OF SECTION
No comments:
Post a Comment