Radial (Taintor) Gates Spec Sheet

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General
Gates, hoist, and accessories shall be of the size, material, and construction shown on the manufacturer’s drawings and specified herein. They shall be Hydro Gate overflow-type or breastwall-type radial gates or approved equal. Similar installations shall have operated successfully for ten years or more. All component parts shall be of the type material shown in the “Materials” section of the specification. An installation list showing five similar projects will be required.

Design
Overflow-type gates shall be designed to withstand a water depth of 1 ft greater than the vertical height of the gate. The breastwall-type gate shall be designed to withstand a water depth of 10 ft on the invert. Maximum face deflection shall be 1/360 of the width.

Design loads placed on the structural reinforcing channels shall not induce stresses in excess of those specified in Section 1.5.1.4 of AISC specification for structural steel building. The slenderness ratio of the radial arms shall not exceed 200. The curved face plate shall be ¼ in. minimum.

Gate Face Assembly Drawing
The face assembly shall consist of horizontal structural members and a curved face plate. Horizontal structural members shall be of adequate size and correctly located to transmit the thrust from the face of the gate to the radial arms. The steel face plate shall be attached to the structures by welding. Sufficient holes shall be located around the perimeter of the assembly for attaching the seals.

The side seals and the top seal for breastwall-type gates shall be flat rubber held in place by steel retainer. The bottom seal shall be rubber of the hollow J-seal type.

Radial Arms
The radial arm assemblies shall consist of structural angles welded to a pin plate and punched to match gusset plates welded to the horizontal structural members of the face assembly. Bolts for field assembly shall be provided.

The steel pin plate shall transmit the load from the radial arms to the pivot pin. A steel collar shall be welded to the pin plate to distribute the bearing load on the pin. It shall be match drilled with the pin.

Pins and Pin Bearings
The cold-rolled steel pivot pins shall be sized to transmit the load to the pin bearings. They shall be bolted to the pin plate collar for field assembly.

The cast iron pin bearings shall extend into the concrete and have sufficient surface to properly distribute the full load to the structure. The bearing shall be bored full length for a running fit with the pivot pin.

Welding
Manual welding operators performing welding operations on these gates or accessories shall be qualified either under Section 9, Part A, of the ASME Boiler and Pressure Vessel Code, or under the Standard Qualification Procedure of the American Welding Society. All welds shall have complete fusion with the base metal and shall be free from cracks, oxides, slag inclusions and gas pockets.

Radial Gate Hoist
The hoist shall consist of a hoist base, gears, cable drums, drumshaft, cables, bearing base, and handwheel to operate the radial gate.

Gears shall be cast iron or steel, accurately machined with cut teeth, smooth running with suitable shafts of cold-rolled steel. The cast iron housing shall be machined to receive all shafting and shall hold gears in alignment without binding. All gearing and shafting shall be suitable for auxiliary motor operation.

The hoist shall be furnished with cold-rolled steel drum shaft and two fabricated drums manufactured from pipe. Each drum will have an inner and outer flange to aid in guiding the wire rope. Stainless steel cables and clamps shall be furnished for field connection of the cables to the bottom corners of the gate.

The design of the hoist mechanism shall be such that the radial gate can be operated with no more than 40-lb effort of the 30-in. diameter cast iron handwheel. The direction of rotation to open the gate shall be cast on the handwheel rim.

Anchor bolts shall be provided to attach the hoist and bearing base to the concrete.

When the hoist is to be motorized, the handwheel shall be omitted. The input shaft of the hoist shall be furnished with a key and keyway to attach the electrically operated unit.

Fasteners
All anchor bolts, assembly bolts, screws, nuts, etc., shall be of ample size to safely withstand the forces created by operation of the gate under the specified head. Quantity and size of fasteners shall be as recommended by the manufacturer. Anchor bolts shall be provided with two nuts each to facilitate installation.

Painting
All structurals and other exposed carbon steel surfaces shall be given one coat of manufacturer’s standard paint. The hoist shall be given one coat of machinery enamel.

Drawings for Approval
Drawings showing the dimensions and details required to locate and install the component assemblies shall be submitted for the engineer’s approval before fabrication and shall be certified by a registered professional engineer.

Materials
Materials shall conform to the requirements of the following standards:

Hot-Rolled Steel (Plates, Structurals, Flat Bars)
ASTM A36 or A306, Grade 60

Cold-Rolled Steel (Shafting and Pins)
ASTM A108, Grade 1045

Stainless Steel (Fasteners)
ASTM F593 or F594 Group 1

Cast Iron
ASTM A126, Class B

Rubber
ASTM D2000, Grade 1AA625

Stainless Steel
ASTM A167 or A240, Type 304L

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