41 22 00 – CRANES AND HOISTS

Herbert, Rowland & Grubic, Inc. 41 22 00 - 1 000483.0450

SECTION 41 22 00 – CRANES AND HOISTS

PART 1 - GENERAL

1.1 SCOPE

A. Stationary Davit Cranes.

1.2 SYSTEM DESCRIPTION

A. Provide 1 stationary Davit Cranes. The Davit Crane shall include stationary hoist base, davit crane, winch, wire rope, and accessories.

1. Davit Crane: The stationary hoist base shall be located to allow removal of the

Sewage Grinder from the wet well and lift it high enough to unload into a pick-up truck.

1.3 SUBMITTALS

A. Submit under provisions of Section 01 33 00 – Submittal Procedures.

B. Submittals shall also consist of the following:

1. Descriptive literature, bulletins, or other data supportive of the crane equipment’s capability of fulfilling the requirements of this specification.

2. Complete list of equipment with the Manufacturer’s name and model numbers.

3. Operation and Maintenance Data: As defined in Section 01 78 23 – Operation and

Maintenance Data.

4. Submit assembly instructions when shipping equipment.

5. Submit certified test results of load tests for cranes.

1.4 QUALIFICATION

A. Manufacturer shall have a minimum five (5) years experience producing substantially similar equipment.

1.5 QUALITY ASSURANCE

A. Verify hook and lifting heights for each application to assure each system is completely operational over range intended.

1.6 WARRANTY

A. Provide in accordance with Section 01 73 00 – Execution Requirements.

Herbert, Rowland & Grubic, Inc. 41 22 00 - 2 000483.0450

PART 2 - PRODUCTS

2.1 STATIONARY DAVIT CRANE FOR SEWAGE GRINDER

A. Basis of Design Manufactuer/Model: Thern, Inc. Model 5FT25X-E2X.

B. Load Rating:

1. Crane Rating: 2,800 pounds.

2. Winch Configuration: 2,000 pounds (at 20 feet below the floor with 90” reach).

C. Crane:

1. 360 degree rotation.

2. Adjustable Boom Angle using ratchet style screw jack with black defender coating.

3. Adjustable boom reach/height with boom extension:

a. Adjustable hook reach from mast centerline: 54-122 inches.

b. Adjustable hook height from floor: 66 – 150 inches.

4. Welded construction of structural steel pipe and tubing.

5. Gray epoxy coated finish.

6. Stainless steel assembly hardware.

D. Cable: 45 feet, 5/16-inch diameter, stainless steel aircraft cable.

E. Hook: Swivel Hook

F. Electric Winch:

1. 1.5 HP, 115/1/60 VAC motor.

2. Automatic internal mechanical load brake.

3. EHC (Emergency Hand Crank) feature, includes 5/8” square input shaft on the reducer.

4. 20-foot power cord with grounded plug.

a. If 20-foot power cord from manufacturer is not available, provide a 12AWG outdoor extension cord with 3 prong grounded plug ends to provide a minimum 20-foot overall distance from the winch to the electrical outlet.

5. 6-foot NEMA 4 pendant control.

6. Line Speed range from 9 – 16 fpm.

7. Bearing plate to attach to the crane.

8. Gray epoxy coated finish.

9. Stainless steel fasteners to mount winch to crane.

PART 3 - EXECUTION

3.01 INSTALLATION

Herbert, Rowland & Grubic, Inc. 41 22 00 - 3 000483.0450

A. Locate davit crane base installation to ensure davit crane hook coverage is capable of lifting all equipment intended.

1. Provide location, structural moments/reactions, and bolt locations/size of the davit crane base to the precast wet well manufacturer so that the wet well is designed for the intended load.

B. Install davit crane complete with all necessary hardware, according to Shop Drawings, manufacturer’s written instructions, and as specified.

C. Demonstrate davit crane operation by successfully removing all intended equipment from the wet well and reinstalling.

END OF SECTION 41 22 00