RR-F-191/2E
3. REQUIREMENTS
3.1 Design. Detailed construction requirements for all gates shall be as specified (see 6.1), and shall meet the applicable requirements of this specification and ASTM F900 for Type I, and II, or ASTM F1184 for Type III, IV, V and VI. Gate frames shall be of welded construction. All gates shall be constructed so that they may be operated by one person.
3.1.1 Color coating and material. When color coating is required the color shall be as specified (see 6.1), and shall match the color specified for chain-link fabric as cited in RR-F-191/1. Steel frames shall be zinc-coated prior to application of color coating. Unless otherwise specified (see 6.1), color coating material shall be at the option of the manufacturer.
3.2 Frames. Gate frames shall be constructed from applicable class, size, and grade members selected from RR-F-191/3 as specified (see 6.1).
3.2.1 Welded zinc-coated frames. When specified (see 6.1), the frames shall be zinc-coated by the hot dip or metal spray method after fabrication. When frames are not zinc coated after fabrication the welds shall be coated with a zinc rich paint or cold zinc spray.
3.2.2 Color coated frames. When color coated frames are required and the frames are of welded construction, all weld areas shall be finished with a suitable rust preventative coating and a matching color final coating.
3.3 Fabric. Gate fabric shall be selected from RR-F-191/1 and shall be of type, size of mesh, gage size of wire, color, and selvage as specified (see 6.1).
3.4 Barbed wire top. When barbed wire top is specified (se 6.1), the end members of the gate frames extend 1 foot above the top horizontal section of the gate frame. Three strands of barbed wire, uniformly spaced, shall be attached by bands, clips or eyebolts.
3.5 Latches, hinges, stops, and keepers. Latches, hinges, stops and keepers shall be zinc-coated steel or color coated over zinc-coated steel as specified (see 6.1). When zinc coating is required, the weight of zinc coating shall be 1.2 ounces per square foot unless otherwise specified (see 6.1).
3.5.1 Single gate latches. Single gate latches shall be fork type, gravity drop bar type with positive locking features, or plunger bar type as specified (see 6.1).
3.5.2 Double gate latches. Latches for double gates shall be fork type latch with center drop rod, or plunger bar type arranged to engage the gate stop, or a positive locking gravity device as specified (see
6.1). Locking devices shall be constructed so that the center drop rod or plunger bar cannot be raised when locked.
3.5.3 Stops. Center gate stop shall be provided for all double gates and shall be suitable for setting in concrete or with anchors for the center drop rod or plunger.
3.5.4 Keepers. Keepers shall be provided for each gate leaf over 5 feet wide. Gate keepers shall consist of a mechanical device for securing the free end of the gate when in full open position.
3.5.5 Gate hinges. Gate hinges shall be of adequate strength for the gate, and shall have large bearing surfaces for clamping or bolting in position. Hinge action shall be such that gates may be easily opened and closed by one person. Hinges shall provide for full 180 degrees (0) swing of gate leaf.
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