B01__Draft_SOW_SH_Dam_17-ton_power_trolley_hoist_1.pdf

BUREAU OF RECLAMATION

NORTHERN CALIFORNIA AREA OFFICE

PROVIDE A MODERN REPLACEMENT OF EXISTING 17 TON WIRE ROPE

TROLLEY CRANE.

1.0 BACKGROUND

The Northern California Area Office (NCAO) has a need to replace an existing wire rope trolley crane with a modern version, equivalent in capacity and capable of working on the existing rail system location and use existing lifting beam and lower guides.

2.0 SCOPE

Purchase replacement modern 17-ton rated wire rope trolley crane with remote operating controls for the Shasta Dam Freight Tower. The contractor will supply new trolley crane, remove old trolley crane, install new trolley crane, and load / functional test new trolley crane. The contractor should anticipate that the paint on the existing trolley crane is lead based.

3.0 OBJECTIVES

The supplier / contractor shall:

1) Supply a modern 17-ton wire rope trolley crane. Designed to meet CMAA ‘C’ Moderate

Service requirements and all applicable OSHA requirements.

a) See attached original Specification 1605-D Sections 7 and 8 This can be used as a basis to design modern version of trolley crane but adhering to design requirements in original spec. Contractor can design and build crane using modern materials, parts, and engineering practices if function is the same as original specification.

2) The new trolley crane will be in a standard indoor industrial environment. Ambient temps can vary from 42F to 130F. Trolley Crane must be designed to work in this environment.

3) Fit new trolley crane in existing footprint of existing crane Dwg (214-D-7223)

a) New trolley crane must respect these prints dimensions and specifications to be considered equal in design.

b) 9’-6” Trolley travel, speed approx. 0 - 25 feet per minute infinitely variable travel speed

c) Hoist requirements

i) 450’ Hoist Travel speed 0 - 20 feet per minute infinitely variable hoisting speed

ii) Trolley crane hoist is required to have a true vertical lift.

iii) Hoist Drum will have to use overlapped wire rope to fit in existing footprint. Hoist drum must have method to spool cable neatly during overlap (See Section 60 of original specification and photo attachment showing bump over tabs installed on existing hoist drum). Contractor must show method they intend on using to ensure wire rope overlaps neatly.

iv) The capacity of the lower systems shall be that the unit will not be heated above 200F or otherwise damaged when lowering a 17-ton load twice in rapid succession (see

Section 58 of original specification). If necessary, an external cooling system will need to be furnished to maintain max temp below 200F.

(1) The Hoist Tower will get very hot during summer months this will need to be taken into consideration when design hoist mechanism.

d) Reuse only the existing rail system.

i) 40#ASCE Rail

4) The existing hoist block and wire ropes on existing trolley crane will twist while lifting heavy loads if not used with existing lifting beam and load block anti rotation device which was added to original designed load block. (See attached photos of lifting beam and modified load block)

a) Contractor will need to perform an engineering study to determine if same style of wire rope originally specified should be used on new hoist or if alternate lay wire rope or hammered steel wire rope would be better for this application. The objective is to determine which style of rope would reduce twisting of load block during lifting heavy loads and overlap on hoist drum the best.

i) Existing wire Rope is 7/8” 6 x 37 wire rope, high grade plow steel, uncoated, fiber core.

b) New load block must be designed with anti-rotation device like existing load block that when used conjunction with lifting beam prevent heavy loads causing the load block to spin and twist wire ropes.

c) Provide a lockable hook block with four locks at 90 degrees.

d) Design new hook to work with existing lifting frame. (See photo attachment and dwgs)

5) Trolley crane will have both a mechanical and electromechanical brake system on hoist.

6) Trolley crane will have VFD drives on all motors. All Motors will be designed for 460-volt 3 phase 60 cycle current. Max Amp load of crane to not exceed 60 amps.

7) Provide a modern enclosed power supply system for the 17-ton trolley crane from the existing electrical connections, provide a cable reel to provide power to trolley.

8) Design the 17-ton trolley crane controls to have remote handheld radio controllers and a detachable pendent back-up controller.

a) Controllers shall have Pitch Catch functionality to allow upper level operator to give crane function control to lower level operator during landing of loads or vices versa.

9) Provide an indication system on handheld controller or mounted to upper-level wall display panel for floor locations when reaching elevations of 975, 875 and 775. (See section 79 of original specifications)

10) Paint new crane yellow color

11) Contractor will be responsible for removing the existing trolley crane. Removal from the facility and proper disposal of the components.

a) Primer on existing hoist is lead based.

12) Contractor will install the new wire rope trolley crane, load test to 125% of rated requirement and provide certification of the test.

a) Contractor to provide load weights.

b) Perform full travel test of crane at full load with two complete cycles of a 17ton load from top of hoist to 750 level back-to-back.

13) Contractor will provide a printed manual and an electronic version consisting of:

a) Operators’ manual

b) Maintenance manual

c) Parts manual

d) Manufacture as built drawings.

14) Contractor will provide a turnover training on new trolley crane

4.0 REFERENCES

• 17-ton hoist SPEC 1605 D

• 17-ton hoist dwg package

• 17-ton hoist photos

• Hoist Tower photos

5.0 SHIPPING AND DELIVERY

a. The supplier shall include all shipping costs in the contract.

b. Delivery and work will be conducted at:

16349 Shasta Dam Blvd

Shasta Lake City, CA 96019

6.0 GOVERNMENT FURNISH PROPERTY

NONE.

7.0 SECURITY

Delivery driver will check – in with security prior to attempting delivery of parts at Shasta Dam

8.0 PLACE OF PERFORMANCE

Shasta Dam Freight Tower

16349 Shasta Dam Blvd

Shasta Lake City, CA 96019

9.0 PERIOD OF PERFORMANCE

Twelve (12) Months from date of award