TI Design Standards_v1_Chapter 3_Sept 2012.pdf

Tactical Infrastructure Design Standards September 2012 (Version V.1)

Chapter 3 – Gate Design Standards

Chapter 3 –

Gate Design Standards

INTENTIONALLY LEFT BLANK

CHAPTER 3 - GATE DESIGN STANDARDS

SECTION 1. GATES TYPES

SECTION 2. MANUALLY OPERATED GATE DESIGN STANDARDS

2.1 MANUALLY OPERATED GATE TYPES

2.1.1 Primary Pedestrian Fence Vehicle Gate (Type G-1)

2.1.2 Primary Pedestrian Fence Personnel Bollard Gate (Type G-2)

2.1.3 Primary Pedestrian Fence Personnel Picket Gate (Type G-3)

2.1.4 Secondary Fence Vehicle GAte (Type G-4)

2.1.5 Secondary Fence Personnel Gate (Type G-5)

2.1.6 Tertiary Fence Gate (Type G-6)

2.1.7 Sliding Vehicle Gate (Type SG-1)

2.2 MANUALLY OPERATED GATE DESIGN CRITERIA

2.2.1 General Design Criteria

2.2.2 Swing Gate Design Criteria

2.2.3 Slide Gate Design Criteria (20 Feet Clear Opening or Less)

2.2.4 Slide Gate Design Criteria (More than 20 Feet Clear Opening)

SECTION 3. AUTOMATED/MOTORIZED PRIMARY PEDESTRIAN FENCE VEHICLE GATES DESIGN

STANDARDS 56

SECTION 4. DRAINGE GATE DESIGN STANDARDS

4.1 DRAINAGE GATE DESIGN CRITERIA

SECTION 5. GATE DRAINAGE PROTECTION DESIGN STANDARDS

SECTION 1. GATES TYPES

When vehicle, personnel or drainage gates (See Figure 32 – Drainage Gates in Type 3 Primary PF) are required to be integrated into any type of TI fence, design criteria, requirements and construction materials established for the surrounding TI fence shall be seamless through the gate structure. CBP utilizes both manual and automated/mechanized gates with their TI fence systems as conditions dictate.

Figure 32 - Drainage Gates in Type 3 Primary PF

SECTION 2.MANUALLY OPERATED GATE DESIGN STANDARDS

Gates shall be secured to the TI fence type by HSS 6x6x3/16 steel tubes that slide through HSS 7x7x3/16 steel tube sleeves, unless specifically noted or detailed otherwise. Manually operated gates shall be locked into place using puck locks with a steel enclosure to protect the puck locks from damage. Gates shall typically be supported using 30 inches wide concrete trench foundations to depths that match the adjacent TI fence type unless Geotechnical conditions require additional foundation capacity. See

Appendix B, Fence & Gate Standard Details, for standard gate details for the various gate types. See

Appendix A, Standard Specifications for standard specifications.

2.1 MANUALLY OPERATED GATE TYPES

2.1.1 PRIMARY PEDESTRIAN FENCE VEHICLE GATE (TYPE G-1)

G-1 Vehicle Gate is used with primary pedestrian fence and consists of an 18-inch high double swing gates without a center post. Gate construction consists of vertical HSS

6x6x3/16 steel tubes (bollards) and HSS 12x12x1/4 steel tube gate posts. Additional members include horizontal HSS 6x6x3/16 steel tube members, HSS 7x7x1/4 slide rail sleeves, ½-inch by 4-inch steel bar, 11-gage steel sheathing, and gate hinges. The G-1 gate provides an opening width of 13 feet 8 inches. The gate bollards are not rotated but maintain a 4-inch maximum clearance between any bollards. The 11-gage steel sheathing is 5 feet in height and is continuous across the top of the gate structure. The sheathing is attached to the bollards using a ½-inch by 4-inch steel bar and a notched 4-inch by 4-inch by ¼-inch steel angle. To meet the anti-perch criteria, the columns are either mitered at 45 degrees and a plate is tack welded on. Latching is accomplished with three concrete filled HSS 6x6x3/16 steel tubes being slid through the slide rail sleeves and six puck lock assemblies. The lock assemblies are located on the U.S. side of the fence.

2.1.2 PRIMARY PEDESTRIAN FENCE PERSONNEL BOLLARD GATE (TYPE G-2)

G-2 Pedestrian Gate is used with primary pedestrian bollard fence and consists of an 18-foot high single swing gate. Gate construction consists of vertical HSS 6x6x3/16 steel tubes (bollards) and HSS 12x12x1/4 steel tube gate posts. Additional members include horizontal HSS 6x6x3/16 steel tube members, HSS 7x7x1/4 slide rail sleeves, ½-inch by

4-inch steel bar, 11-gage steel sheathing, and gate hinges. The G-2 gate provides an opening width of 5 feet 2 inches. The gate bollards are not rotated but maintain a 4-inch maximum clearance between any bollards. The 11-gage steel sheathing is 5 feet in height and is continuous across the top of the gate structure. The sheathing is attached to the bollards using a ½-inch by 4-inch steel bar and a notched 4-inch by 4-inch by ¼-inch steel angle. To meet the anti-perch criteria, the columns are mitered at 45 degrees and a plate is tack welded on. The gate is supported by a 6-foot deep by 30-inch wide reinforced concrete trench footing. Latching is accomplished with two concrete filled

HSS 6x6x3/16 steel tubes being slid through the slide rail sleeves and four puck lock assemblies. The lock assemblies are located on the U.S. side of the fence.

2.1.3 PRIMARY PEDESTRIAN FENCE PERSONNEL PICKET GATE (TYPE G-3)

G-3 Personnel Gate is used with primary pedestrian picket fence and consists of an 18-foot high single swing gate. Gate construction consists of vertical HSS 6x6x3/16 steel tubes (frame), 1-inch square steel bar pickets, and HSS 12x12x1/4 steel tube gate posts.

Additional members include horizontal HSS 6x6x3/16 steel tube bottom member, HSS

2x4x3/16 rails, HSS 7x7x1/4 slide rail sleeves, and gate hinges. The G-3 gate provides an opening width of 5 feet 2 inches. Pickets are placed on the Mexican side of the gate and spaced to maintain a 3-inch maximum gap. To meet the anti-perch criteria, the columns and vertical tube members are either mitered at 45 degrees and a plate is tack welded

on. The gate is supported by a 6-foot deep by 30-inch wide reinforced concrete trench footing. Latching is accomplished with two concrete filled HSS 6x6x3/16 steel tubes being slid through the slide rail sleeves and four puck lock assemblies. The lock assemblies are located on the U.S. side of the fence.

2.1.4 SECONDARY FENCE VEHICLE GATE (TYPE G-4)

G-4 Vehicle Gate is used with SF and consists of a 15–foot high double swing gates without a center post. Gate construction consists of vertical and horizontal HSS

6x6x3/16 steel tubes (frame), HSS 3x3x3/16 steel rails, and HSS 12x12x1/4 steel tube gate posts. Additional members include HSS 3x3x3/16 diagonal steel tube members, 6 gage wire mesh with ¼-inch by 2-inch by 4-inch steel plate weld tabs and gate hinges. The G-

4 gate provides an opening width of 15 feet. Wire mesh or perforated panel is located on the Mexican side of the gate and the hinges are located on the U.S. side in line with the horizontal HSS 6x6x3/16 steel tube frame members. The gate is supported by a 4-foot deep by 30-inch wide reinforced concrete trench footing. Latching is accomplished with a single lock assembly located at the center of the gate on the U.S. side of the fence.

This gate is not designed for vehicle impact loading, and steel tube members are not filled with concrete and reinforcing steel.

2.1.5 SECONDARY FENCE PERSONNEL GATE (TYPE G-5)

G-5 Personnel Gate is used with SF and consists of a 15-foot high single swing gate. Gate construction consists of vertical and horizontal HSS 6x6x3/16 steel tubes (frame), HSS

3x3x3/16 steel rails, and HSS 6x6x3/16 steel tube gate posts. Additional members include

6 gage wire mesh or perforated panel with ¼-inch by 2-inch by 4-inch steel plate weld tabs, and gate hinges. The G-5 gate provides an opening width of 5 feet 8 inches. Wire mesh is located on the Mexican side of the gate and the hinges are located on the U.S.

side. The gate is supported by a 4-foot deep by 30-inch wide reinforced concrete trench footing. Latching is accomplished with HSS 5x5x3/16 slide rail sleeves, a single HSS

4x4x3/16 slide rail, and a single puck lock assembly located on the U.S. side of the fence.

This gate is not designed for vehicle impact loading, and steel tube members are not filled with concrete and reinforcing steel.

2.1.6 TERTIARY FENCE GATE (TYPE G-6)

G-6 Gate is used with TF and consists of 10-f00t high single or double swing gate. Gate construction consists of ASTM F900 circular steel frame, 3/8-inch truss rods, and chain link fabric. Gate posts are ASTM F900 circular or square steel and sized based on the opening width of the gate. Gate is supported by concrete shaft footing which is 3 feet 10 inches to 4 feet 4 inches deep by 16 inches to 24 inches in diameter depending on gate post size. The single swing gate has a latch while the double swing gate uses a latch and drop rod with a drop rod foundation to securely close the gates.

2.1.7 SLIDING VEHICLE GATE (TYPE SG-1)

A sliding vehicle gate can be used in PF or SF and consists of a 17–foot high by 22–foot wide sliding gate panel supported on an overhead rail and provides a 20-foot wide clear opening. All sliding gates shall have a single operating panel capable of sliding from completely closed to completely open (20 feet) and back to completely closed. Gates shall be capable of manual operation from both the U.S. and Mexico side of the gate by a single person using reasonable force. Gate panels are constructed of HHS 5x5x3/16 steel tube for both vertical and horizontal members, 1-inch square solid steel bar pickets, and wheeled truck assemblies. Gate columns are placed on both sides of the gate opening and protected by crash columns on each side of the clear opening. Gate columns and additional vertical members, typically HHS 6x6x3/16 steel tube, provide support to the overhead rail which is of solid steel construction with no splice over its entire length. If used with PF, gate columns and additional vertical members are to be concrete filled to 10 inches above the top of footing and the gate constructed for vehicle impact loading conditions. Gate panel members are not to be filled with concrete. The sliding gate is supported by a 36-inch wide reinforced concrete trench footing. A locking mechanism is provided for both the completely closed and open gate positions and locks are to be located on the U.S. side of the gate.

2.2 MANUALLY OPERATED GATE DESIGN CRITERIA

Gates shall adhere to all design criteria as established under the fence type the gate is to be integrated into. In addition, gates shall conform to the following:

2.2.1 GENERAL DESIGN CRITERIA

Design of manually operated gates shall utilize Swing Gate Standard Details (Types

G-1 through G-5) and Sliding Vehicle Gate Standard Detail (Type SG-1), located in

Appendix B, Fence & Gate Standard Details.

Gate framing shall be designed to resist the critical loading case and shall not allow any more than ¼-inch deflection by mesh or pickets when acted on by a 100-pound point load.

Vehicular gates that require larger than 20-foot wide clear openings shall require special design analysis and direction on a project-by-project basis.

Provide locking mechanisms shall be provided for gates when gate is in both the completely closed and completely open positions.

The lock for the gate in the closed position shall be located on the U.S. side of the fence. When the PF gate is not on the border, the lock shall be accessible from both sides of the fence. When the gate is in the closed and locked position, the lock shall be concealed from view from the Mexico side of the fence. Hand holes with sliding cover plates shall be used for completely covering and accessing the lock from the Mexico side of the fence.

2.2.2 SWING GATE DESIGN CRITERIA

Swing gates shall open to the north, unless otherwise approved by CBP.

Swing gates shall be able to swing from closed position to the north face of the fence and back to closed position.

Vehicle swing gates shall be double leaf, and personnel swing gates shall be single leaf.

Swing gates shall use hinges in the appropriate quantity that are capable of supporting the gate leaf with less than a ¼-inch deflection at any point.

All swing gates shall be capable of manual operation by a single person using reasonable effort. Reasonable effort is defined as a horizontal force of approximately 75 pounds applied to the gate.

Primary Pedestrian Fence Vehicle Gate (Type G-1) shall be installed in the primary pedestrian fence at Border Monuments in the State of Arizona, see Appendix D, Miscellaneous Standard Details.

Primary Pedestrian Fence Personnel Gates (Type G-2 or G-3) shall be installed in the primary pedestrian fence at Border Monuments in the States of New Mexico and California, see Appendix D, Miscellaneous Standard Details.

2.2.3 SLIDE GATE DESIGN CRITERIA (20 FEET CLEAR OPENING OR LESS)

Sliding gates shall have a single operating panel capable of sliding from completely closed (no more than a 4-inch clear gap between gate and fence) to completely open (clear opening) and back to completely closed (no more than a 4-inch clear gap between gate and fence).

Sliding gates shall be operable by a single person weighing 120 pounds pulling/pushing the gate to the open/closed position.

Sliding gate panels shall hang in-place; ground mounted load supporting tracks shall not be permitted.

Slide gate overhead track(s) shall be of solid steel construction, shall be galvanized to prevent rust to allow for a smooth track surface, and shall provide guide for gate wheeled truck assembly. The track shall be accessible for cleaning.

Sliding gate panels shall slide smoothly along an overhead track through use of wheeled truck assemblies. Each wheeled truck assembly shall have the ability to pivot in both the horizontal and vertical planes at all times. Wheel truck assembles shall be protected from debris and shall be of all solid steel construction.

Gate crash columns shall be placed on each end of the sliding gate clear opening to protect against vehicular impact and to assist in maintaining gate panel connection to the overhead track (PF only).

Mount guide roller so as to each crash column to cushion gate panel from impact with crash columns. Protect roller axles from debris obstructions (PF only).

2.2.4 SLIDE GATE DESIGN CRITERIA (MORE THAN 20 FEET CLEAR OPENING)

It is permissible to assume that the sliding gate will not be required to be opened or closed during wind events over 50 mph.

Sliding gates shall have a single operating panel capable of sliding from completely closed (no more than 4-inch clear gap between gate and fence) to completely open

(clear opening) and back to completely closed (no more than 4-inch clear gap between gate and fence).

Sliding gates shall be operable by a system of chains and gears connected to a turn wheel (non-electric). The turn wheel shall be geared to be operable by a single person exerting a force of no more than 25 pounds.

Sliding gate panel shall hang in place and be supported by ground mounted load bearing tracks.

Sliding gate panel interior vertical members shall be HSS 6x6x3/16 rotated 45 degrees and spaced at 4-inches clear between members.

Sliding gate panel shall be hollow structural sections to the size and section required to meet the structural loading requirements.

Sliding gate panel members do not have to be filled with concrete or rebar.

Sliding gate overhead track(s) shall be of solid steel construction, shall be galvanized to prevent rust to allow for a smooth track surface, and shall provide guide for gate wheeled truck assembly. The track shall be accessible for cleaning.

Sliding gate panels shall slide smoothly along an overhead track through use of wheeled truck assemblies. Each wheeled truck assembly shall have the ability to pivot in both the horizontal and vertical planes at all times. Wheel truck assembles shall be protected from debris and shall be of all solid steel construction.

Ground mounted tracks shall be channel embedded into concrete foundation. The track shall be accessible for cleaning.

Gate crash columns shall be placed on each end of the sliding gate clear opening to protect against vehicular impact and to assist in maintaining gate panel connection to the overhead track (PF only).

Drop rod style crash columns shall be integrated into the sliding gate panel and placed between end crash columns to protect against vehicular impact and to assist in maintaining gate panel connection to the overhead track (PF only).

Mount guide roller to each crash column so as to cushion gate panel from impact with crash columns. Protect roller axles from debris obstructions (PF only).

Any frame systems, whether parallel or perpendicular to the primary PF, required for the operation of the sliding gate panel shall have anti-perch measures integrated into the design.

SECTION 3. AUTOMATED/MOTORIZED PRIMARY PEDESTRIAN FENCE VEHICLE GATES

DESIGN STANDARDS

PF vehicle gates that require key pads shall conform to all design criteria as established under separate

CBP developed design standards. These gates are operated by key pads installed at the gate and/or by radio frequency controls carried by the Border Patrol field agents. Each gate has key pad controllers provided on both the U.S. and Mexico side of the gate and each key pad is installed in an all-weather tamperproof steel and/or concrete enclosure to control motorized gates. A sensor control system shall stop the gate if an obstruction is detected that will interfere with the operation of the gate. The locking and unlocking system shall be electronic and operate in conjunction with the open and close mechanism. The primary electrical system shall have a battery back-up system capable of maintaining electronic locking mechanism, controls, and indicator lights for a minimum period of 12 hours. A backup mechanical means is also provided to lock the gate in either the completely open or completely closed position if conditions require it. In the event of a power failure, the gate drive system shall disconnect automatically so the gate can be operated and locked manually. For a full description of the requirements and specifications, see Appendix G, Automated/Motorized Primary Pedestrian Fence

Vehicle Gate.

SECTION 4.DRAINGE GATE DESIGN STANDARDS

Drainage Gate (Type DG-1) consists of swing gates mounted on a fixed post. The drainage gate structure consists of vertical HSS 6x6x3/16 steel tubes (bollards), 11-gage solid steel plate (steel sheathing) at the top, and HSS 12x12x1/4 steel tube gate posts. Additional members include HSS 8x8x1/4 steel tube header placed over the drainage gate, HSS 7x7x3/16 slide rail sleeve, puck locks, and barrel hinges. While the primary pedestrian fence may be 18 feet or higher, the gate height is dependent on the watershed conditions and analysis of the drainage conveyance at the proposed gate location. For ease of construction and aesthetic appeal, a 6-foot high gate opening should be used for required clear drainage openings of 6 feet or less, and 11-foot high gate openings should be used for required clear drainage openings of 11 feet or less. The design engineer shall specify the number of drainage swing gates required for a given location. Each gate shall have a minimum of 8 feet of horizontal clear width. The gate bollards are not rotated and spacing is 5 inches of maximum clearance between any two bollards. The bollards above the steel tube header shall be rotated so as to be oriented on the diagonal relative to the fence alignment, with maximum 4-inch spacing. The 11-gage steel sheathing is 5 feet in height and is continuous across the top of the gate structure. The sheathing is attached to the rotated bollards using a

½-inch by 4-inch steel bar and a notched 4-inch by 4-inch by ¼-inch steel angle. To meet the anti-perch criteria, the bollards at the top of the gate structure and the gate posts shall be mitered at 45 degrees and a plate is tack welded on. Drainage gates shall typically be supported using 30-inch wide concrete trench foundations to depths that match the adjacent TI fence type unless Geotechnical conditions require additional foundation capacity. Latching is accomplished with concrete filled steel tube slide rails being slid through the slide rail sleeves. Each gate receives two slide rails and four puck lock assemblies, with all located on the U.S. side of the fence.

4.1 DRAINAGE GATE DESIGN CRITERIA

Gates shall adhere to all design criteria as established under the respective fence type into which the gate is being inserted. In addition, gates shall conform to the following:

Design of drainage gates shall utilize Drainage Gate Standard Details (Type DG-1).

Locking mechanisms shall be provided for gates when they are in both the completely closed and completely open positions.

Clear spacing between gate vertical members shall not exceed 5 inches.

SECTION 5.GATE DRAINAGE PROTECTION DESIGN STANDARDS

Any alteration to existing conditions requires consideration of drainage effects as they relate to the installation or improvement of primary pedestrian, secondary, tertiary fence gates (TI gates). TI gates shall be protected from erosion due to stormwater run-off and allow the conveyance of stormwater run-off design across the site. In addition, any TI gates constructed or improved within the Roosevelt

Reservation, or 60 feet north of the land border, as well as any TI fence constructed within the Rio

Grande and Colorado River floodplains, are required to comply with various border related treaties between the U.S. and Mexico. For general drainage design criteria that shall be used for sizing erosion protection and conveyance measures as well as USIBWC treaty requirements are discussed in Chapter

1, Road, Bridge & Signage Design Standards, Section 7.1, USIBWC Floodplain and Section 7.2, General Drainage.