Appendix I_Bridge Crane_DISTRO A.pdf

STINFO

SOO # 16904-26-001

ATTACHMENT 1

APPENDIX I

2 March 2026

DISTRIBUTION A: Approved for public release, distribution is unlimited.

IRA-26-1433

Statement of Objectives (SOO)

Attachment 1 – Performance Parameters

Appendix I – Bridge Crane AEDC-Arnold AFB: Raw Water Cooling System Modernization

Bridge Crane Requirements:

General Requirements:

1. Bridge crane shall be in compliance with ASME B30.2, ASME B30.10, and 29 CFR

1910.179 and capable of traversing the full length of the building.

2. Crane shall have a single 20-ton main hook assembly, including the hoist, hook, wire rope, motors, drives, control system, and brakes. Main hook shall be located to the West of the trolley.

3. Crane shall have a single 5-ton auxiliary hook. Auxiliary hook shall be located to the East of the trolley.

4. Dual drive system, in compliance with CMAA 70, shall be provided for the center bridge motors, including motors, brakes, and controls.

5. Trolley drives shall have a minimum of two driven wheels.

6. Variable Frequency Drive (VFD) systems shall be provided for all movements of the bridge, trollies, and hoists. All VFD systems shall have the same manufacturer.

7. Variable speed control shall be provided for the bridge, trollies, and hoists.

a. Bridge Travel Speed: 1.3 ft/min to 125 ft/min

b. Trolley Travel Speed: 0.8 ft/min to 80 ft/min

c. Main Hoist Lift Speed: 0.2 ft/min to 22 ft/min

d. Auxiliary Hoist Lift Speed: 0.4 ft/min to 40 ft/min

8. Compass points shall be clearly indicated on the crane. Compass points shall be coordinated with the button control labels.

9. Crane shall be provided with a manually activated warning bell and flashing LED warning beacons in accordance with ASME B30.2 that will be automatically activated during bridge or trolley movement.

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10. Entire bridge crane, including beams and support brackets, shall be completely supported by the building structure.

11. Crane assembly, including runway, bridge, trollies, hoists, beams, brackets, and other support structures, shall maintain the following clearance:

a. Overhead Clearance: 3 in

b. Horizontal Clearance: 2 in

12. Crane shall be provided with three LED light fixtures. Fixtures shall be mounted beneath the crane bridge and shall be serviceable from walkways.

13. Trollies shall include a minimum of five swivel eye fall arrest anchorages.

a. Each anchorage shall be rated for a minimum of 10,000 lbs.

b. Anchorages shall be sized and positioned to allow two workers to attach to them simultaneously and use 6 ft fall arrest lanyards to maintain 100% tie-off while gaining access to mechanical and electrical components for inspection, maintenance, and servicing.

14. Minimum of two 120 V, 20A duplex power outlets, with ground fault circuit interruption in accordance with UL 943, shall be provided along the bridge.

15. Ladder access to the bridge walkway shall be provided.

Mechanical Component Requirements:

16. If required, gear reducers for the trollies shall be designed, manufactured, and rated in accordance with AGMA 6013-B16 and satisfy the following:

a. Gear reducers shall be enclosed and fabricated from forged, cast, or rolled steel components.

b. Gears and pinions shall be spur, helical, or herringbone.

c. Gears shall operate in an oil bath.

17. Open gears and pinions shall be manufactured in compliance with AGMA 2001-D04

Quality Class 6 or better in accordance with AGMA 2011-B14. All open gears shall be provided with a removable safety guard for inspection and servicing.

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18. Hoisting ropes shall meet the following:

a. Domestic regular lay, pre-formed, uncoated, extra-improved plow steel, 6 x 37 construction with independent wire-rope core.

b. Rated capacity load plus the load block weight divided by the number of parts of rope shall not exceed 20% of the certified breaking strength of the rope.

c. Secured to the hoist drum such that no less than three full wraps of rope remain at each anchorage to the hoist drum at the lowest allowable position.

19. Load blocks shall be constructed of steel and meet the following:

a. Load blocks shall include an unpainted, single barbed, forged hook in compliance with ASTM A668. Hooks shall be designed and rated in compliance with ASME

B30.10 and CMAA 70.

b. Hook shall be fitted with safety latches designed to prevent inadvertent displacement of slings from the hook saddle.

c. Hook shall be free to rotate 360° when supporting a test load up to 131.25% of the rated capacity.

d. Hook nut with a set screw, or similar fastener, shall be provided in a plane parallele to the longitudinal axis of the hook shank. Hook nut shall not be welded.

e. Hook and nut shall be capable of being completely disassembled to provide access to all surface of the hook and nut.

20. Brakes shall be provided for the bridge, trollies, and hoists and shall meet the following:

a. Shoe or disc type rated for Class C service as defined in CMAA 70

b. Wheels shall be fabricated of cast iron in compliance with ASTM A159 or other

Government-approved high-strength ductile cast iron.

c. Spring set, and electrically released by a continuously rated direct-acting magnet.

d. Self-aligning with an automatic wear compensation mechanism.

e. Torque shall be adjustable over a 2:1 torque range.

f. Disc brakes shall be totally enclosed with multiple discs and stationary-releasing magnets.

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g. Hoist brakes shall be adjustable to 50% of rated capacity and have an externally accessible means of manual release.

21. Equalizer sheaves shall be equipped with sintered oil-impregnated bushings in compliance with ASTM B438 or ASTM B439.

22. Equipment and components that cannot be made leak-proof shall be fitted with drip pans to prevent leakage of lubricants onto the lifted load or the floor. Drain pans shall be constructed of steel with provisions to remove the collected lubricant.

23. Splash-type oil lubrication systems shall be provided for the bridge, trolley, and hoist gear cases and shall meet the following:

a. Oil pump shall be provided on vertically mounted gear cases exceeding two reductions.

b. Oil pumps shall be capable of maintaining oil flow while the gearbox is being driven in either direction.

c. Electric pumps that energize when the drive mechanism brakes are released may be used when the shaft speed is insufficient to ensure adequate oil flow.

Electrical Component Requirements:

24. Crane power supply shall be 480 VAC, 3 Phase, 60 Hz.

25. All electrical equipment shall be rated for a minimum of 40,000 AIC unless otherwise approved by the Government.

a. Main line disconnect shall be provided, including a circuit breaker, contactor, and control circuit, such that all crane motion will be stopped due to low voltage, overload, fuse failure, or operation of the Emergency Stop button.

b. Surge protection shall be in compliance with UL 1449.

c. Circuit breakers shall be in compliance with UL 489.

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26. Bridge, trollies, and hoists shall be provided with limit switches at either end of allowable travel.

a. Bridge and trolley limit switches shall be heavy-duty, quick-break, double-pole, double-throw in compliance with NEMA ICS 2 with NEMA Type 3R housings.

b. Hoist upper limit switches shall consist of one rolling-type, adjustable-geared, control circuit interrupting switch with a secondary weight-operated limit switch that interrupts power to all hoist motor conductors and sets the hoist brake.

c. Hoist lower limit switch shall be a rotating-type, adjustable-geared, control cirtuit interrupting switch.

d. Geared limit switches shall automatically reset and interruption of motion in one direction shall not prevent motion in the opposite direction.

27. Crane electrification shall meet the following:

a. Heavy-duty, 4-wire, insulated conductor rail with tandem sliding-shoe collectors shall be provided for the runway.

b. Festooned, insulated cables supported by wheeled carriers running in a messenger track shall be provided for the trolley and hoists. Cable loops shall not extend below the high hook position and cables shall be protected from abrasion, kinking, or excessive twisting.

c. Festooned, insulated cables supported by wheeled carriers running in a messenger track shall be provided for the pendant. Cable loops shall not extend below the high hook position and cables shall be protected from abrasion, kinking, or excessive twisting. The pendent shall move along the bridge independent of the trolley.

28. Motors shall be in compliance with NFPA 70, NEMA MG-1, and UL 1004-1 and meet the following:

a. Drain holes shall be provided at low points on each end.

b. Motors shall have inspection and service covers with gaskets.

c. Hoist drive motors shall be low-slip, totally enclosed, AC motors rated for continuous duty and fitting with auxiliary cooling fans.

d. Hoist drive motor windings shall have one self-restoring and one automatic-reset thermal-sensitive device.

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e. Hoist drive motors shall be capable of providing full torque at zero speed.

f. Hoist drive motors shall have Class HHH insulation in accordance with NEMA

MG-1.

g. Bridge and trolley motors shall be totally enclosed, AC motors.

h. Bridge and trolley motors shall have Class H insulation in accordance with NEMA

MG-1.

29. Hoist motors shall be provided with electric brakes that meet the following:

a. Electric brakes shall be housed in NEMA ICS 6 Type 12 enclosures.

b. Electric brakes shall be automatically applied when power is interrupted or a full or partial loss of one phase of power occurs. Electric brakes shall be manually released.

Controls Requirements:

30. Primary control shall be provided by a single remote control station that allows for complete, independent, and simultaneous operation of all crane functions.

a. Control station shall include two transmitters, with a single crane-mounted receiver, with synchronous transmission encoding and decoding.

b. Frequency shall comply with FCC Part 15.

31. Secondary control shall be provided by a single pendant operator capable of operating all bridge, trolley, and hoist movements.

32. Selector switch or transfer relay shall be provided in an accessible location to allow for selection of primary or secondary control.

33. All crane motions shall have a minimum of three selectable speeds for operation.

34. Each control system shall include the following:

a. Emergency Stop Button

b. Emergency Stop Reset Button

c. Warning Bell Push Button