Exhibit_25 _1_Oct_15.pdf

SECTION 41 22 13 Page 1

SECTION 41 22 13.13

BRIDGE CRANES

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN GEAR MANUFACTURERS ASSOCIATION (AGMA)

AGMA 2001 (2004d) Fundamental Rating Factors and Calculation

Methods for Involute Spur and Helical Gear Teeth

AGMA 2009 (2001b) Bevel Gear Classification, Tolerances and

Measuring Methods

AGMA 2011 (1998a) Cylindrical Wormgearing Tolerance and

Inspection Methods

AGMA 2015-1 (2001) Accuracy Classification System - Tangential

Measurements for Cylindrical Gears

AGMA 6009 (2000a) Standard for Gearmotor Shaft Mounted and

Screw Conveyor Drives

AGMA 6010 (1997f) Standard for Spur, Helical, Herringbone, and

Bevel Enclosed Drives

AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)

AISC 325 (2005) Manual of Steel Construction

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS

(ASHRAE)

ASHRAE 90.1 - IP (2007) Energy Standard for Buildings Except Low-Rise

Residential Buildings, I-P Edition

AMERICAN WELDING SOCIETY (AWS)

AWS D1.1/D1.1M (2008) Structural Welding Code - Steel

AWS D14.1/D14.1M (2005) Welding Industrial and Mill Cranes and Other

Material Handling Equipment

ASME INTERNATIONAL (ASME)

ASME B30.10 (2005) Hooks Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks and Slings

ASME B30.16 (2007) Overhead Hoists (Underhung) Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks and Slings

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ASME B30.17 (2006) Overhead and Gantry Cranes (Top Running Bridge, Single Girder, Underhung Hoists)

ASME B30.2 (2005) Overhead and Gantry Cranes (Top Running

Bridge, Single or Multiple Girder, Top Running Trolley Hoist)

ASME HST-1 (1999; R 2004) Performance Standard for Electric

Chain Hoists

ASME HST-2 (1999; R 2004) Hand Chain Manually Operated Chain

Hoists

ASME HST-3 (1999; R 2004) Manually Lever Operated Chain Hoists

ASME HST-4 (1999; R 2004) Performance Standard for Overhead

Electric Wire Rope Hoists

ASME HST-5 (1999; R 2004) Air Chain Hoists

ASME HST-6 (1999) Air Wire Rope Hoists

ASME NOG-1 (2004) Rules for Construction of Overhead and Gantry

Cranes (Top Running Bridge, Multiple Girder)

ASME NUM-1 (2004) Rules for Construction of Cranes, Monorails, and Hoists with Bridge or Trolley or Hoist of the Underhung Type.

ASTM INTERNATIONAL (ASTM)

ASTM A 1023/ (2007) Standard Specification for Stranded A 1023M Carbon Steel Wire Ropes for General Purposes

ASTM A 159 (1983; R 2006) Standard Specification for Automotive

Gray Iron Castings

ASTM A 275/A 275M (2007) Standard Test Method for Magnetic Particle

Examination of Steel Forgings

ASTM A 325 (2007a) Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength

ASTM A 490 (2008a) Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength

ASTM A 563 (2007a) Standard Specification for Carbon and Alloy

Steel Nuts

ASTM A 668/A 668M (2004) Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use

ASTM A 931 (1996; R 2002) Standard Test Method for Tension

Testing of Wire Ropes and Strand

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ASTM B 438/B 438M (2005) Standard Specification for Sintered Bronze Bearings (Oil Impregnated)

ASTM B 439 (2007) Standard Specification for Iron-Base Sintered

Bearings (Oil-Impregnated)

ASTM B 612 (2000) Standard Specification for Iron Bronze

Sintered Bearings (Oil-Impregnated)

ASTM B 633 (2007) Standard Specification for Electrodeposited

Coatings of Zinc on Iron and Steel

ASTM E 125 (1963; R 2003) Photographs for Magnetic Particle

Indications on Ferrous Castings

ASTM F 436 (2007a) Hardened Steel Washers

ASTM F 959 (2007a) Compressible-Washer-Type Direct Tension

Indicators for Use with Structural Fasteners

CRANE MANUFACTURERS ASSOCIATION OF AMERICA (CMAA)

CMAA 70 (2004) EnviroTop Running and Bridge and Gantry Type Multiple Girder Electric Overhead Traveling Cranes, No. 70

CMAA 74 (2004) Top Running and Under Running Single Girder

Electric Overhead Cranes Utilizing Under Running Trolley Hoist, No. 74

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA 250 (2003) Enclosures for Electrical Equipment (1000

Volts Maximum)

NEMA ICS 2 (2000; Errata 2002; R 2005; Errata 2006) Standard for

Industrial Control and Systems: Controllers, Contractors, and Overload Relays Rated Not More than 2000 Volts AC or 750 Volts DC: Part 8 - Disconnect Devices for Use in Industrial Control Equipment

NEMA ICS 5 (2000) Industrial Control and Systems: Control

Circuit and Pilot Devices

NEMA ICS 6 (1993; R 2006) Standard for Industrial Controls and

Systems Enclosures

NEMA ICS 8 (2000; R 2005) Industrial Control and Systems Crane and Hoist Controllers

NEMA MG 1 (2007; Errata 2008) Standard for Motors and

Generators

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2007; AMD 1 2008) National Electrical Code - 2008 Edition

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THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)

SSPC SP 6 (2000; E 2004) Commercial Blast Cleaning

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

29 CFR 1910 Occupational Safety and Health Standards

29 CFR 1910.147 Control of Hazardous Energy (Lock Out/Tag Out)

29 CFR 1910.179 Overhead and Gantry Cranes

29 CFR 1910.306 Specific Purpose Equipment and Installations

UNDERWRITERS LABORATORIES (UL)

UL 1004 (1994; Rev thru Mar 2006) Electric Motors

UL 1449 (2006) Surge Protective Devices

UL 489 (2002; Rev thru Jun 2006) Standard for Molded-Case

Circuit Breakers, Molded-Case Switches and Circuit- Breaker Enclosures

UL 50 (2007) Standard for Enclosures for Electrical

Equipment

UL 943 (2006; Rev thru Feb 2008) Ground-Fault Circuit-

Interrupters

1.2 DEFINITIONS

a. Crane Bridge: That part of an overhead crane system consisting of girder(s), end trucks, end ties, walkway, and drive mechanism which carries the trolley(s) and travels along the runway rails parallel to the runway.

b. Crane Runway: The track system along which the crane operates horizontally, including track hangar rods, track connection devices, and runway structural supports.

c. Dead Loads: The loads on a structure which remain in a fixed position relative to the structure.

d. Girder: The principal horizontal beam of the crane bridge. It is supported by the crane end trucks. Normally the crane trolley mounted hoist is suspended from the girder below the crane.

e. Live Load: A load which moves relative to the structure under consideration.

f. Pendant: A control for a hoist and/or a crane. The pendant hangs from the hoist or the crane by a cable at a height that is easy for the operator to reach.

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g. Rated Load: For the purpose of this specification the rated load is defined as the maximum working load suspended under the load hook.

Load block and wire ropes, conforming to ASTM A 1023/A 1023M and ASTM A 931 are not included in the rated load.

h. Standard Commercial Cataloged Product: A product which is currently being sold, or previously has been sold, in substantial quantities to the general public, industry or Government in the course of normal business operations. Models, samples, prototypes or experimental units do not meet this definition. The term "cataloged" as specified in this section is defined as "appearing on the manufacturer's published product data sheets. These data sheets should have been published or copyrighted prior to the issue date of this solicitation bearing a document identification number or bulletin number.

i. Top Running Crane: An electric overhead traveling crane that runs on rails on top of support beams. The load is supported by the entire cross-section of the beam.

j. Trolley Mounted Hoist: A combined unit consisting of a wheeled trolley that provides horizontal motion along the bridge girder, and a hoist suspended from the trolley that provides lifting and lowering of a freely suspended load.

k. Under running (Underhung) Crane: An electric overhead traveling crane that is supported by crane end trucks suspended below the crane runway. The load is supported by hanging from the lower flange of a beam.

1.3 SYSTEM DESCRIPTION

The requirements for the crane runway and rail supporting structures are specified in Section 05 12 00, STRUCTURAL STEEL.

1.3.1 Load and Sizing Calculations

Submit complete list of equipment and materials, including manufacturer's descriptive data and technical literature, performance charts and curves, catalog cuts, and installation instructions. Submit calculations verifying the sizing of the bridge girder, end trucks and travel drives. Include seismic analysis of bridge girder and end trucks.

1.3.2 OET Design Criteria

Cranes shall operate in the given spaces and match the runway dimensions and rails indicated. Hook coverage, hook vertical travel, clear hook height, lifting capacity, and load test weight shall not be less than that indicated.

1.3.2.1 General

The hoisting equipment shall include the number and capacity of cranes at the location indicated on the Delivery Order. Also clearly locate and identify each multiple girder hoist and system components.

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1.3.2.2 Classification

Crane shall be designed and constructed to MHI CMAA 70 Class and service as indicated, requirements for operation in hazardous or non hazardous environment with hoist in accordance with ASME HST-1, ASME HST-2, ASME HST- 3, ASME HST-4, ASME HST-5 and ASME HST-6, as indicated.

1.3.2.3 Rated Capacity and Speeds

Provide crane with rated capacity as indicated. Provide auxiliary hoist with rated capacity as indicated. Lower load block or assembly of hook, swivel bearing sheaves, pins and frame suspended by the hoisting ropes are not considered part of the rated capacity. Rated speeds (in fpm) for the hoist, hoist micro-drive, gantry micro-drive, trolley micro-drive, bridge and trolley at the rated load as indicated in the Delivery Order.

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Overhead Electric Traveling (OET) Crane(s); G

Two complete hard copies and one electronic copy in Adobe Acrobat (.pdf) and AutoCAD (.dwg) format on CD or DVD of detail drawings containing complete wiring and schematic diagrams. Diagrams shall indicate each numbered wire, where wire initiates, where wire terminates, and any other details required to demonstrate that the system has been coordinated and will properly function as a unit.

Drawings shall show layout and anchorage of equipment and appurtenances, and equipment relationship to other parts of the work including clearances for maintenance and operation.

Crane runway system; G Complete schematic wiring diagram; G

Description of operation.

SD-03 Product Data

OET Design Criteria; G Overhead Electric Traveling (OET) Crane(s); G Load and Sizing Calculations; G Festoon System; G Runway Electrification System; G Variable Frequency Drives; G Bumpers; G End Stops; G Spare Parts; G

Spare parts data for each different item of material and equipment specified, after approval of the detail drawings and not later than

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1 month prior to the date of beneficial occupancy. The data shall include a complete list of parts and supplies, with current unit prices and source of supply.

Framed Instructions; G

Diagrams, instructions and safety requirements.

Nameplates; G

Including all information called for in NFPA 70, Section 430.7.

Cab Control Station; G Pendant Control Station; G Operator's Cab; G Overloads; G Limit Switches; G

SD-06 Test Reports

Acceptance Testing; G

Test reports in booklet form showing all field tests performed to adjust each component and all field tests performed to prove compliance with the specified performance criteria, upon completion and testing of the installed system. The report shall include the information as required by paragraph ACCEPTANCE TESTING.

Hook Assembly; G

Including Hook Proof Test and Hook and Nut non-destructive Test Report. Include hook material and any heat treatment performed, stamped on the hook shank or documented in certification papers furnished with the hooks. Crane test data recorded on appropriate test record forms suitable for retention for the life of the crane.

SD-07 Certificates

Overload Test Certificate; G No Hazardous Material; G Loss of Power Test; G Crane Runway System; G Certificate of Compliance; G

Including listed Standards.

Wire Ropes; G

Including Manufacturer's Certificate of Breaking Strength.

SD-10 Operation and Maintenance Data

Operation and Maintenance Manuals; G

Two complete hard copies and one electronic copy in Adobe Acrobat (.pdf) format on CD or DVD of operation manuals and maintenance manuals for the equipment furnished. One complete set prior to

SECTION 41 22 13 Page 8 performance testing and the remainder upon acceptance. Operation manuals shall detail the step by step procedures required for system startup, operation and shutdown. Operation manuals shall include the manufacturer's name, model number, parts list, and brief description of all equipment and basic operating features.

Maintenance manuals shall list routine maintenance procedures, possible breakdowns and repairs, and troubleshooting guides.

Maintenance manuals shall include piping and equipment layout and simplified wiring and control diagrams of the system as installed.

Operation and maintenance manuals shall be approved prior to the field training course.

1.5 QUALITY ASSURANCE

1.5.1 Manufacturer Qualification

Overhead Electric Traveling (OET) Crane(s) shall be designed and manufactured by a company with a minimum of 10 years of specialized experience in designing and manufacturing the type of overhead crane required to meet requirements of the Contract Documents.

1.5.2 Pre-Delivery Inspections

Contractor is responsible for performance of quality control inspections, testing and documentation of steel castings, hook assembly and nuclear safety as follows. Submit all crane test data recorded on appropriate test record forms suitable for retention for the life of the crane. Visually inspect and test load-carrying steel castings ASTM A 668/A 668M using the magnetic-particle inspection method per ASTM A 275/A 275M. Reference allowable degree of discontinuities to ASTM E 125, and relationship to service loads and stresses, critical configuration, location and type.

Methods of repairing the discontinuities is subject to review by the Contracting Officer.

1.5.3 Inspection of Hook Assembly

Hook and nut shall be inspected by a magnetic particle type inspection or X rayed prior to delivery. Documentation of hook inspection shall be furnished to Contracting Officer at the field operational testing. As part of the acceptance standard, linear indications will not be allowed. Welding repairs of hook will not be permitted. A hook showing linear indications, damage or deformation will not be accepted, and shall be replaced.

1.5.4 Certificates

Submit an Overload Test Certificate stating that the crane can be periodically load tested to 125 percent (plus 5 to minus 0) of rated load.

Also submit the following certificates:

a. stating that No Hazardous Material is contained within system or components.

b. stating that the system is safe to perform a Loss of Power Test

c. stating that the Crane Runway System conforms to the requirements as specified herein and as specified in Section 05 12 00 STRUCTURAL

STEEL.

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d. Certificate of Compliance with listed Standards.

1.5.5 Overhead Electric Traveling (OET) Crane(s)

a. Submit shop drawings showing the general arrangement of all components in plan, elevation, and end views; hook approaches on all four sides, clearances and principal dimensions, assemblies of hoist, trolley and bridge drives, and complete schematic wiring diagram with description of operation, and Runway Electrification System. Include weights of components and maximum bridge wheel loads and spacing.

b. Shop drawing quality shall be equivalent to the contract drawings accompanying this solicitation.

c. Provide integral schedule of crane components on each drawing.

Provide maximum wheel loads (without impact) and spacing imparted to the crane runway system track beams. Indicate the crane speeds along the runway, the trolley speeds along the bridge girder, and the multiple girder hoist lifting speeds; all speeds indicated are speeds with hoist loaded with rated crane capacity load.

1.5.6 Welding Qualifications and Procedures

Perform welding in accordance with qualified procedures using AWS D14.1/D14.1M as modified. Written welding procedures shall specify the contractor's standard dimensional tolerances for deviation from camber and sweep and not exceed those specified in AWS D14.1/D14.1M. Perform all welding indoors. Qualify welders and welding operators in accordance with AWS D1.1/D1.1M or AWS D14.1/D14.1M. Allowable stress values shall comply with CMAA 70.

1.5.7 Safety Requirements

Comply with the mandatory and advisory safety requirements of ASME

B30.2,ASME B30.10, ASME B30.16, ASME HST-1,ASME HST-4, NFPA 70, 29 CFR 1910,

29 CFR 1910.179, and 29 CFR 1910.306. Nuclear certification, testing, and rules of construction shall be in accordance with 29 CFR 1910.147, and ASME NOG-1 for top running type cranes and ASME NUM-1 for underhung type cranes.

Submit analysis and test reports to Contracting Officer for approval.

1.6 DELIVERY, STORAGE, AND HANDLING

Protect all delivered and stored equipment from the weather, humidity, temperature variations, dirt and dust, and other contaminants.

1.7 FIELD MEASUREMENTS

Before performing any work, contractor shall become familiar with all details of the work, verify all dimensions in the field, and submit a letter describing the results of this verification including discrepancies to the Contracting Officer and crane manufacture.

1.8 EXTRA MATERIALS

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Submit spare parts data for each different item of material and equipment specified and/or as recommended by the manufacturer, after approval of the detail drawings and not later than 2 months prior to the date of beneficial occupancy. Include in data a complete list of parts and supplies, with current unit prices and source of supply. Furnish and deliver one set of manufacturer's recommended spare parts to the site. Suitably package the spare parts for long-term protection and storage. Legibly label the packaging to identify the spare parts. Also include a list of the furnished spare parts in the Maintenance manual.

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 General

Provide materials and equipment which are standard products of manufacturers regularly engaged in the fabrication of complete and totally functional cranes including necessary ancillary equipment.

2.1.2 Nameplates

Secure nameplates to each major component of equipment with the manufacturer's name, address, type or style, model or catalog number, and serial number. Provide two bridge identification plates, one for each side of bridge. Provide noncorrosive metal identification plates with letters which are easily read from the floor, showing a separate number such as BC- 1, BC-2, for each bridge crane.

2.1.3 Prohibited Use of Asbestos Products

Provide materials and products, required for designing and manufacturing cranes, which do not contain asbestos.

2.1.4 Capacity Plates

Two capacity plates indicating the crane capacity in metric tons and tons (tons) are required, one secured to each side of bridge. Fabricate each capacity plate with a steel backing plate and exterior quality/fade-resistant stick-on labels with letters large enough to be easily read from the floor. Place capacity plates in a location visible to pendant operator's position after the crane has been installed.

2.1.5 Safety Warnings

Affix labels in a readable position to each lift block or control pendant in accordance with ASME B30.16, ASME B30.2 and ASME B30.17. Submit safety warnings, diagrams and other framed instructions suitably framed and protected for display as indicated by the Contracting Officer as follows:

a. Design and locate the word "WARNING" or other legend to bring the label to the attention of the operator. Provide durable type warning labels and display the following information concerning safe-operating procedures: Cautionary language against lifting more than the rated load; operating the hoist when the hook is not centered under the hoist; operating hoist with twisted, kinked or damaged rope; operating damaged or malfunctioning hoist; operating a

SECTION 41 22 13 Page 11 rope hoist with a rope that is not properly seated in its hoist drum groove; lifting people; lifting loads over people; and removing or obscuring the warning label.

b. To avoid operation of crane in the wrong direction, affix the words

"FORWARD" and "REVERSE" and accompanying directional arrows in a location on the trolley and bridge which are visible and readable to the operator from pendant station. The words "FORWARD" and "REVERSE" shall agree with the markings on control pendant. Do not indicate directional arrows on control pendant.

2.2 STRUCTURAL MATERIALS

2.2.1 Bolts, Nuts and Washers

High-strength bolted connections shall be SAE Grade 5 bolts with corresponding lock washers, ASTM F 436, nuts ASTM A 563, etc., conforming to requirements of AISC 325 bolts. Bolts, nuts and washers ASTM F 959 shall conform to ASTM A 325 bolts. Galvanized bolts are not acceptable. Do not use ASTM A 490 bolts.

2.2.2 Bridge Girder or Girders

Provide welded structural steel box section, wide flange beam, standard I- Beam, reinforced beam or section fabricated from rolled plates and shapes for bridge girders.

2.2.3 Bridge Rails or Bars

Trolley runway rails, crane girders and other sections shall be straight and true. When loaded with motor driven cranes the deflection of rails shall not exceed 1/800 of the span. Calculate the deflection with the worst case of two loaded bridge cranes located adjacent each other. Make all rail joints flush and true without misalignment of running tread and design to minimize vibration. The gap between adjacent rail ends and the vertical misalignment of running treads shall not exceed 0.0625 inch. Level the bridge rail to a plus-or-minus 1/8 inch at all rail support joints. Fasten bridge rail to top cover plate, wide flange, or centered on flange or offset near web plate for welded box sections, complete with welded clips. Bolt bridge rail joints using standard joint bars. Stagger rail joints. Provide a positive stop at bridge rail ends to prevent creep.

2.2.4 End Ties and Bridge Girder End Connections

Use welded steel box sections for end ties. Provide full depth diaphragms at girder connections and jacking points. Provide horizontal gusset plates at the elevation of top and bottom end tie flanges for connection to girder ends. Make end connections with high-strength bolts. Use body-bound bolts fitted in drilled and reamed holes to maintain the crane square.

2.2.5 Bridge End Trucks

Provide rotating or fixed axle type end trucks fabricated of structural tubes or from structural steel to provide a rigid box section structure.

Provide jacking pads for removal of wheel assemblies.

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2.2.6 Trolley Frame

Provide trolley frame consisting of two structural steel side frames or trucks welded together with one or more structural steel load girts to form a one-piece unit. Provide pads for the use of jacks or wedges when changing truck wheels. Make all trolley yokes and load bars of drop forged, cast or rolled steel.

2.2.7 End Stops and Bumpers

Fit crane runways and bridge girders with structural steel end stops. Fit bridge end trucks and trolley frames with shock-absorbing, spring or hydraulic type bumpers capable of decelerating and stopping the bridge and/or trolley within the limits stated by OSHA and MHI CMAA. Provide trolley end stops of sufficient strength to withstand the impact of a fully loaded trolley moving at 50 percent of maximum rated travel speed. When two bridge cranes are on the same runway, one crane shall be fitted with shock-absorbing bumpers on each end of each end-truck, and the other crane shall have shock-absorbing bumpers as per above on one end only of each end-truck which is the opposite end of the adjacent crane. Fit the other end of the end-truck with a structural steel stop to engage the bumpers of the adjacent crane. Provide bridge bumper stops as specified in Section 05 12 00 STRUCTURAL STEEL. Locate stops to permit maximum bridge and trolley travel.

2.2.8 Footwalks

Set the location and construction of footwalks conforming to ASME B30.2. A full-length structural platform is required on the driver's side of the bridge. Provide checkered steel flooring for platform, double member handrail and a suitable toe-guard, with 30 inch clearance in front of control equipment. Minimum 15 inch clearance is required in front of bridge machinery. Short and full rear platforms and cross over walks are optional.

Provide safety handrails for footwalks.

2.2.9 Runway Rails

Provide runway rail size as specified in Section 05 12 00 STRUCTURAL STEEL, or as recommended by the crane manufacturer.

2.2.10 Operator's Cab

2.2.10.1 Design

Design and construct operator's cab in accordance with CMAA 70 or CMAA 74 and ASME B30.2. Locate cab access to facilitate entry and exit by crane operator. Provide space near cab entrance for storage of a carbon-dioxide, dry chemical, or equivalent hand fire extinguisher.

2.2.10.2 Cab Construction

Provide fixed cab mounted on bridge or trolley mounted cab of the enclosed or open type for outdoor or indoor use, and designed to provide a clear view of the operating floor and hook for operator. Provide cab with a suitable heating unit. Cab shall be located with the operator facing as indicated.

2.2.11 Additional Provisions for Outside Service

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Seal weld structural members on outdoor cranes. Provide crane bridges with parking brakes which will sufficiently hold the crane against a wind pressure of 5 psf for in-service conditions. Provide crane bridges with manually-operated pin locks at each rail, designed to securely anchor the crane against a wind pressure of 30 psf for out-of-service conditions.

2.3 MECHANICAL EQUIPMENT

2.3.1 Variable Frequency Drives

2.3.1.1 Bridge Drives

Provide either the A-1 or A-4 bridge drive arrangement as specified in CMAA 70 or CMAA 74, consisting of a single electric motor mechanically connected through gear reduction and drive shafts to the drive wheels or separate drive motors at each end of bridge. Acceleration and deceleration shall meet the requirements specified in this section. Gears shall conform to applicable AGMA standards. Gear reducers shall be oil tight and fully enclosed with pressure or splash type lubrication. Bridge-travel limit-switches are optional.

2.3.1.2 Trolley Drives

Provide complete trolley drive arrangement with a minimum of two wheels driven by an integral electric motor. Provide drive mechanism which runs in totally enclosed oil bath. Limit switches are optional for drive mechanism.

Provide acceleration and deceleration controls meeting the requirements specified in this section.

2.3.1.3 Micro-Drives

Provide the following crane motions with a separate micro-drive, as indicated: main hoist, auxiliary hoist, trolley drive and/or gantry drive.

The micro-drives are used to precisely position loads. Provide each micro-drive with an electric motor, gear reducer, magnetic coupling clutch and necessary controls. Connect the output shaft of the reducer to an extension of the primary drive high-speed shafting with a magnetic coupling clutch.

Coupling shall normally be disengaged and become engaged only if the micro-drive is required. Provide electrical clutch components, required for proper operation, conforming to the requirements specified in paragraph ELECTRICAL COMPONENTS. Provide magnetic coupling type clutches which engage and disengage the micro-drives from the high speed shafts of the main drive arrangement. Engage the clutch by electromagnet and release by springs.

Provide clutch ratings not less than 150 percent of the micro-motor rated torque as amplified by the intervening gearing. Clutch enclosures shall facilitate easy access for wear inspection of the friction elements and visual examination of the clutch assemblies.

2.3.2 Load Blocks

2.3.2.1 Main and Auxiliary Hoist Load Blocks

Load blocks shall be of welded steel construction. Load blocks shall be provided with hot rolled or forged steel fixed crosshead separate from the sheave pin with swivel mounting for forged steel hook. Each lubrication fitting for sheave pins shall be an independent type recessed within the sheave pin or adequately guarded to prevent damage. The pitch diameter of

SECTION 41 22 13 Page 14 the sheaves shall be not less than 16 times the rope diameter. Sheaves shall be supported by roller type bearings on steel sheave pins. Provisions for external lubrication shall be provided to allow pressure relief and purging of old grease. Sheave blocks shall be constructed to provide maximum personnel safety and to prevent the hoist rope from leaving the sheaves under normal operating condition.

2.3.2.2 Hook Assembly

Hooks shall be single barbed and shall be made of forged steel complying with ASTM A 668. Hook dimensions shall be as shown. Hooks shall be fitted with safety latches designed to preclude inadvertent displacement of slings from the hook saddle. Painting or welding shall not be performed on the hook. Hook nut shall be secured with a removable type set screw or other similar fastener, but shall not be welded. Hooks shall be designed and commercially rated with safety factors in accordance with MHI CMAA. The hook shall be free to rotate through 360 degrees when supporting the rated load.

2.3.3 Hoisting Ropes

Hoisting ropes shall be regular lay, preformed, uncoated, improved plow steel, 6 by 37 construction, with independent wire rope core. Ropes shall be suited to meet the service requirements. Rope socketing or U bolt clip connections shall be made in accordance with clip or rope manufacturer's recommendation, and shall be equal to or greater than the rope strength.

Hoisting ropes shall be the rated capacity load plus the load block weight divided by the number of rope parts, and shall not exceed 20 percent of the certified breaking strength of rope. Hoisting ropes shall be secured to hoist drum so that no less than two wraps of rope remain at each anchorage of hoist drum at the extreme low position (limit switch stop).

2.3.4 Sheaves

Sheaves shall be of cast, forged, rolled, or welded structural steel.

Sheave grooves shall be accurately machined, smoothly finished and free of surface defects.

2.3.5 Hoist Drums

Hoist drums shall be of welded rolled structural steel, cast steel, or seamless steel pipe. Diameter of drum shall be not less than 24 times the diameter of hoist cable. Drums shall be machined and provided with right hand and left hand grooves to take the full run of cable for the required lift without overlapping, plus a minimum of two full wraps of cable when load is on floor. At least one groove shall remain unused when hook is at the highest position. Drum grooves shall be cut from solid stock and have sufficient depth for size of cable required. Drum flanges shall be guarded so that the cable cannot wedge between drum flange and hoist frame.

2.3.6 Gearing

Provide enclosed gear reducers type gearing. Gears and pinions shall be spur, helical, or herringbone type only, and be forged, cast or rolled steel. Open-type gearing is not acceptable. Provide gears and pinions with adequate strength and durability for the crane service class and

SECTION 41 22 13 Page 15 manufactured to AGMA 2001 Quality Class 6 or better precision per AGMA 2009, AGMA 2011, or AGMA 2015-1.

2.3.6.1 Gear Reducers

Provide gear reducers which are standard items of manufacturers regularly engaged in the design and manufacture of gear reducers for Class D and G cranes or integral components of standard hoists or hoist/trolley units of manufacturers regularly engaged in the design and manufacture of hoists or hoist/trolley units for Class A, B or C cranes. Provide gear reducers designed, manufactured and rated in accordance with AGMA 6010, or AGMA 6009 (for trolley drives only), as applicable. Except for final reduction, provide the gear reduction units with fully enclosed in oil-tight housing.

Design gearing to AGMA standards and to operate in an oil bath. Operation shall be smooth and quiet.

2.3.7 Brakes

In addition to the requirements of CMAA 70, provide shoe or disc type brakes with thermal capacity suitable for class and service specified in this section. Shoe or disc brakes shall be spring-set and electrically-released by a continuously rated direct acting magnet. Provide brakes which are self-aligning and easily adjusted for torque setting and lining wear. Brake lining material shall be asbestos free. Provide cast iron brake wheels conforming to ASTM A 159 or the manufacturer's standard high-strength ductile cast-iron brake wheels, provided that the material exhibits wear characteristics in the form of powdered wear particles and is resistant to heat-checking. Disc brakes shall be totally enclosed and have multiple discs with stationary releasing magnets. Provide brake torque easily adjustable over a 2:1 torque range.

2.3.7.1 Hoist Holding Brakes

Each hoist shall be equipped with at least 1 holding brake. Holding brake shall be disc or shoe design, applied to one of the following: motor shaft or gear reducer shaft or rope drum. Braking system shall be designed to have zero hook lowering motion when a raise motion is initiated. Primary brake shall be a spring set, electrically released, disc or shoe type brake.

Brake shall have a minimum torque rating of 150 percent of motor torque.

Brake shall be capable of holding the rated load with zero hook drift.

Primary brake shall be automatically set when controls are released or when power is interrupted. Provisions shall be made to facilitate easy brake adjustment. Hoists shall be furnished with mechanical control braking or a power control braking system. Typical power means include dynamic lowering, eddy current braking, counter torque, regenerative braking, variable frequency, and adjustable or variable voltage.

2.3.7.2 Hoist Control Brake

Each hoist shall be equipped with an integral mechanical load brake of the "Weston" type or multiple disc type. Multiple disc type brake shall be provided with external adjustment for wear or each hoist shall be provided with electrically controlled braking system to prevent overspeeding, as indicated.

2.3.7.3 Trolley Brake

SECTION 41 22 13 Page 16

Trolley braking system shall be provided with spring applied and electrically released shoe brakes or disc brakes or trolley braking system shall be provided with electrically operated and hydraulically operated shoe brakes or disc brakes as indicated. Hydraulic portion of braking system shall be designed so that the shoes will become disengaged by spring pressure and set by hydraulic pressure. Electrical portion of the braking system shall be designed such that the shoes will be spring applied and electrically released. Braking system shall be automatically set when controls are released or power is interrupted. Provisions shall be made to facilitate easy brake adjustment. Brakes shall have a torque rating of at least 50 percent of trolley drive motor rated torque.

2.3.7.4 Bridge Brakes

Bridge braking system shall be provided with a spring applied and electrically released single shoe or disc brake for each bridge drive motor or bridge braking system shall be provided with electrically operated and hydraulically operated shoe or disc brakes as indicated. Hydraulic portion of braking system shall be designed so that the shoes will be disengaged with spring pressure and set with hydraulic pressure. Electrical portion of braking system shall be designed so that the shoes will be spring applied and electrically released. Braking system shall be automatically set when controls are released or power is interrupted. Provisions shall be made to facilitate easy brake adjustment. Brakes shall have a torque rating of at least 50 percent of bridge drive motor rated torque.

2.3.8 Wheels

Provide wheels manufactured of rolled or forged steel. Wheel treads and flanges shall be rim toughened to between 320 and 370 Brinell hardness number. Provide double-flanged bridge and trolley wheels. Trolley and bridge wheels shall have straight treads. Equip wheels with self-aligning double-row spherical roller-bearings of capacity as recommended by bearing manufacturer for design load of trolley or bridge.

2.3.9 Bearings

All bearings, except those subject to a small rocker motion, shall be anti-friction type. Provide a means for lubrication for bearings not considered lifetime lubricated by the manufacturer. Equip equalizer sheaves with sintered oil-impregnated type bushings in accordance with ASTM B 438/B 438M, ASTM B 439, or ASTM B 612.

2.3.10 Anti-Drip Provisions

Design cranes to preclude leakage of lubricants onto the lifted loads, floor, or external grounds. Fit all equipment and components which cannot be made leak-proof with suitable drip pans. Drip pans shall be manufactured of steel and designed to permit removal of collected lubricant.

2.3.11 Lubrication System

Splash type oil lubrication system shall be provided for hoist, trolley and bridge gear cases; an oil pump shall be used on vertical mounted gear cases exceeding two reductions. Oil pumps shall be the reversible type capable of maintaining the same oil flow direction and volume while being driven in either direction. Electric motor driven pumps may be used when input shaft

SECTION 41 22 13 Page 17 speed is too low at any operating condition to ensure adequate oil flow. In such applications, pump shall be energized whenever drive mechanism brakes are released.

2.4 ELECTRICAL COMPONENTS

2.4.1 Control System

Main hoist and auxiliary hoist motion control system shall be single or two speed, with ac magnetic control of ac squirrel cage motor, or single or two speed, with ac magnetic control of ac wound rotor motor. Control shall provide for reversing, and for a mechanical load brake, an automatically controlled eddy current brake, a countertorque control brake, ac stepless secondary saturable reactor control of an ac wound rotor type motor, ac adjustable frequency control of an ac squirrel cage motor, dc magnetic control of a dc series wound motor, or dc variable voltage control of a dc shunt wound motor, as indicated.

2.4.1.1 Travel Control System

Bridge and trolley motion control system shall be single or two speed with ac magnetic control of squirrel cage motors, five speed with dc magnetic control of ac wound rotor motors, ac static stepless secondary saturable reactor control, ac adjustable frequency control, or five speed dc magnetic constant potential control, as indicated.

2.4.1.2 Drive Control System

The main hoist, trolley and bridge micro drive control systems shall be ac or dc magnetic, single speed, reversing, as indicated.

2.4.2 Power Sources

2.4.2.1 System Supply Voltage

Cranes shall be designed to be operated from the power source indicated.

Design energy isolating devices for such machine or equipment to accept a lockout device in accordance with NFPA 70.

2.4.2.2 Transformers

Provide dry type transformers and carry full load continuously at rated voltage and frequency without exceeding an average temperature rise of 115 degrees C above an ambient temperature of 40 degrees C. Provide transformer with totally enclosed case finished with manufacturer's standard coating system. Fully encapsulate transformers, except for those specifically designed for use as an isolation transformer for static power conversion units.

2.4.2.3 Power Rectifiers

Power rectifiers shall be provided where required to convert ac to dc.

Active semiconductor devices shall be silicon type. Rectifiers for motor control system shall be three phase full wave rectifiers. Rectifiers for brakes shall be single phase full wave or three phase full wave rectifiers.

A single rectifier may be used in lieu of several smaller rectifiers; brakes shall be supplied from a different rectifier than the other equipment.

SECTION 41 22 13 Page 18

Protective enclosures shall conform to the requirements of NEMA ICS 6, Type as indicated. Rectifying elements shall be hermetically sealed and mounted on heat sinks cooled by natural convection or by mechanical means. Minimum protection for rectifiers shall consist of transient surge suppressors, and 100,000 AIC current limiting 700V rectifier type fuses in the ac line.

Minimum protection for main power rectifiers shall include a line isolation transformer of the type specifically designed for use with static conversion units. Individual diode sets and thyristors shall be protected by fuses on the ac side. Each rectifier bridge used in brake circuits (including overload protection) shall be rated for continuous duty at a minimum of 150 percent of load rating, and for 1 minute at a minimum of 300 percent of load rating. Each rectifier or SCR bridge used in the dc constant potential control system or in dc variable voltage shall be rated for continuous duty at a minimum of 100 percent of the load rating, and for one minute at a minimum of 200 percent of load rating following 8 hours at 100 percent load.

The dc rated output voltage shall not exceed 460 volts.

2.4.3 Motors

2.4.3.1 General Requirements for Motors

a. Provide motors designed specifically for crane and hoist duty.

Provide drain holes at low points near each end. Provide inspection and service covers with gaskets. Hardware shall be corrosion-resistant. Provide motors conforming to the requirements of NFPA 70, NEMA MG 1 and UL 1004.

b. Motor heaters shall energize when mainline contactor is de-energized, and water heaters de-energize when mainline contactor is de-energized. Provide motors 20 HP and larger with a suitable heater to prevent condensation during long periods of inactivity.

Motor heater shall be an integral component of the hoist and motor manufacturer.

c. Provide one embedded thermal sensitive device in hoist motor windings. Device and associated circuitry shall serve as an alarm activating an amber signal or pilot light visible to control stations when motor temperatures become excessive. Establish set point below the Class B insulation temperature limit. Thermal-sensitive device and associated circuits shall be self-restoring (automatic reset). Two-speed, two-winding motors with a solid-state control are not allowed for creep-speed use.

2.4.3.2 Main and Auxiliary Hoist Motor

Hoist motor shall be dc crane type, dc industrial type or 800 Series dc mill type, single speed; single winding, or two speed; two winding, NEMA design D squirrel cage ac type, wound rotor type ac type, ac squirrel cage type for use in ac adjustable frequency control systems, dc series wound type, or dc shunt wound type as indicated.

2.4.3.3 Bridge and Trolley Drive Motors

Provide ac crane type, dc industrial type, 800 Series dc mill type single-speed; single-winding; two-speed; two-winding; NEMA design B squirrel cage ac type rated wound rotor ac induction type, ac type designed for ac

SECTION 41 22 13 Page 19 adjustable frequency operation, dc series wound type, or dc shunt-wound type bridge and trolley drive motors.

2.4.3.4 Motor Enclosures

Provide motor enclosures that are totally enclosed, non-ventilated (TENV) and conform to NEMA 250.

2.4.3.5 Motor Insulation and Time Rating

2.4.3.6 Bridge and Trolley Motor Insulation and Time Rating

Provide bridge and trolley drive motors with an insulation which has a Class F or Class H rating based on 220 or 258 degrees F motor temperature rise above 103 degrees F ambient with frame size selection based on continuous rating.

2.4.3.7 Micro-Motors

Micro-motors for bridge and trolley drives shall be direct current industrial type, shunt wound motors, industrial type, single-speed; single-winding; ac squirrel cage motor, and conform to the requirements of NEMA MG

1. Provide totally enclosed micro-motor, fan cooled (TEFC), with Class F or H insulation. Motor voltage rating shall comply with system supply voltage rating specified.

2.4.4 Electric Brakes

2.4.4.1 Brakes

a. Electric-hydraulic bridge and trolley brakes shall be dc shunt magnet type equipped with hydraulic actuators manually-operated with a foot-operated master control unit in the operator's cab, and electrically released with the operation of the mainline contactor POWER-OFF pushbutton or power failure.

b. Provide remote control bleeders operable by pushbutton and foot pedal except for power-assisted brake systems. Remote control bleeders shall be complete with pushbutton clearly labeled and located in operator's cab where the operator can easily depress the pushbutton and pump the brake simultaneously. In lieu of the combination electric-hydraulic brakes, separate hydraulic and electric brakes may be provided. Design hydraulic brake system to ensure equal pressure at each brake cylinder.

2.4.4.2 Hoist Brake Time Delay

Provide one of the hoist holding brakes with a time-delay setting (from 1 to 3 seconds). The time-delay shall be initiated upon releasing the control pushbutton or returning the master switch to OFF. Operation of mainline POWER-OFF pushbutton or power failure shall result in each hoist brake's setting without any time-delay.

2.4.4.3 Automatic Stop System

Provide fail-safe spring set electrically-controlled brakes when power is interrupted. Brakes shall be released with a mainline contactor POWER-OFF

SECTION 41 22 13 Page 20 pushbutton or a master switch for the associated drive. Brakes shall automatically stop when there is a power failure. Design electric system to be mechanically released. Provide enclosures for electrical-controlled brake components conforming to NEMA ICS 6, Type as indicated, and NEMA ICS

8. Provide direct current shunt magnetic shoe brakes with an electrical forcing circuit for rapid release of brake. Each shunt coil brake shall be circuited for both conductors to open simultaneously when the brake is de-energized.

2.4.5 Control System

Provide a separate controller for each motor; a duplex type for 2-motor bridge drives and a quadraplex type for 4-motor bridge drives on ac central cranes. When 2-motor bridge drives are furnished and dc magnetic control is required, provide dc series-connected motors. When 4-motor bridge drives are furnished and dc magnetic control is required, provide dc series-parallel connected motors. Provide overload protection conforming to NEMA ICS 2 and NFPA 70. When contactors are used for starting, stopping and reversing, contactors shall be mechanically and electrically interlocked.

2.4.5.1 Control Panels

Fabricate control panels of solid sheet steel designed and constructed to conform to requirements of NEMA ICS 6, Type as indicated. Provide thermostatically-controlled heaters to keep control enclosure temperatures at or above 0 degrees C in each static crane control panel. Hinge and equip control panel doors with gaskets and fitted with key-lock handle design, complete with a single key to open all locks.

2.4.5.2 Main and Auxiliary Hoist Control

One of the below motor control systems shall be used, as indicated on Delivery Order.

a. Hoist motor control system shall provide one speed in each direction with an electrically operated, full magnetic, across the line reversing type starter. Speed contactors shall be used to prevent the operation of high speeds and low speeds.

b. Hoist motor control system shall provide two speeds in each direction with of an electrically operated, full magnetic, across the line reversing type starter. Electrical and mechanical interlocks shall be used to prevent the operation of high speeds and low speeds.

c. Hoist motor control shall provide five speed dc magnetic control of ac wound rotor motor with eddy current braking. Eddy current brake shall provide an adjustable varying artificial loading of wound rotor hoist motor on at least two hoisting points and four lowering points. Operation of hoist shall be prevented upon loss of eddy current brake excitation. Eddy current brake shall be excited with reduced voltage when hoist control is in the OFF position. Positive drive down is required on all lowering points. On first speed point hoisting, hook shall not lower with 100 percent of rated load, and the no load hook speed shall not exceed 30 percent of rated speed.

On first speed point lowering, the full load hook speed shall not exceed 15 percent of synchronous motor speed. A self excited

SECTION 41 22 13 Page 21 alternator shall be mounted on the electric load brake housing to excite load brake if power supply and holding brakes fail.

d. Hoist motor control shall provide five speed dc magnetic control of ac wound rotor motor with a mechanical load brake. First point for hoisting shall provide not more than 40 percent of full load motor torque. First point lowering speed with any load up to rated load shall not exceed more than 80 percent of full load hoisting speed.

Second point lowering shall cause 75 percent of rated load to lower at not more than 50 percent of full load hoisting speed.

e. Hoist motor control shall provide five speed, countertorque control for wound rotor motors. When the control handle is in the fourth and fifth point lowering position there shall be a positive drive down of the hook or load to not less than synchronous speed nor more than 25 percent of synchronous speed with full rated load. This fourth and fifth point for lowering shall provide regenerative braking. All other lowering points shall provide speed retardation by the application of countertorque. Countertorque shall increase as the control handle is moved toward the NEUTRAL or OFF position.

Countertorque secondary resistance control…