Expanded metal fence – Raised and Flattened Types
Expanded metal fence (or expanded steel fence), a high-security and anti-corrosion fence, is made of aluminum, low carbon steel or stainless steel. Its diamond-shaped openings make expanded metal a versatile product for applications such as commercial, industrial, governmental or institutional sites and where the possibility of malevolent incursion. Expanded metal fence includes two types:
Raised expanded metal fence. Expanded metal as it comes from the press after being simultaneously slit and stretched having the strands and bonds form a uniform angle to the original plane of the solid sheet from which it was formed creating an open mesh diamond making one continuous panel that cannot unravel.
Flattened expanded metal fence. Expanded metal which has been cold rolled leaving a flat, smooth surface.
A piece of galvanized raised expanded metal panel on the blue background.
EMF-01: Raised expanded metal fence.A piece of galvanized flattened expanded metal panel on the blue background.
EMF-02: Flattened expanded metal fence.
For improving the high strength, anti-climb and anti-thieves properties and retrofits of ornamental pickets and previous expanded metal fence, it can be designed into following four types:
Chain link fence and expanded metal fence.
Ornamental picket fence and expanded metal fence.
Retrofits of expanded metal fence.
Expanded metal fence construction
Expanded metal fence has four application types.
EMF-03: Four application types of expanded metal fence details.
Expanded metal fence with top rail, intermediate rail and bottom rail.
EMF-04: Expanded metal fence with top rail, intermediate rail and bottom rail can improve its strength and security.
Expanded metal fence is installed with rails including top, bottom, and intermediate rails for adding strength and security of expanded metal mesh panels. Top rail should be installed with 8 in. below the top of the expanded metal mesh panel and the bottom rail should be installed with 8 in. above the bottom of the mesh panel. Construction of an expanded metal fence greater than 10 ft in height requires an intermediate rail.
When two panels are stacked to reach a required height, the upper panel shall overlap the lower panel and be secured to a rail.
In addition to our standard fence, we can design different types according to your use, such as expanded mesh fence with barbed wire, razor wire or bending top.
Expanded metal fence with barbed wires.
EMF-05: Expanded metal fence with barbed wires can improve its anti-climbing ability.Expanded metal fence with bending top.
EMF-06: Expanded metal fence with bending top gives a visual barrier to thieves.
Expanded metal fence specifications
Material: aluminum, low carbon steel and stainless steel.
Treatment coating: painting, galvanized and PVC coating.
Fence framework:
Fences is higher than 8 ft.
Posts and horizontal rails accordance with F1043.
Fittings to the framework: nuts, bolts, vertical posts and horizontal rails, post caps, barb arms, offset line rail clamps.
Fence topping: barbed wire and barbed tape (razor wire).
Barbed wire
12-4-3-14R. 12 gauge twisted strand wire, 4-point, 14 gauge barbs, spaced 3 inches on center.
12-4-5-14R. 12 gauge twisted strand wire, 4-point, 14 gauge barbs, spaced 5 inches on center.
Barbed wire arms for three to six strands of barbed wire to meet the security requirement.
Barbed tape (razor wire):
18/24 in. single coil helical, 0.025 in. thickness.
18/24/30/40/60 in. single coil concertina, 0.025 in. thickness.
24/30 in. double coil concertina, 0.025 in. thickness.
Addition to expanded security fence structure:
Anti-climb panels. Extending above the vertical portion of the fence to prevent circumvention by climbing.
Tunneling barrier panels. Tunneling barrier panels are a below grade barrier intended to prevent tunneling and shall be installed to a specified depth and installed to the vertical fence using the specified system’s attachment method.
Table 1: Expanded Metal Panels Description for Security Fence Use
Description 1?2 in.–13R 1?2 in.–13R (.188) 3?4 in.–9R 3?4 in.–9F 1 in.–7R (.240) 1 1?2 in.–6R
Width of Panel (ft.) 3 ? 6 3 ? 6 3 ? 6 3 ? 6 3 ? 5 3 ? 5
Height of Panel (ft.) 6 ? 12 6 ? 12 6 ? 12 6 ? 12 6 ? 12 6 ? 12
Diamond Dimensions (in.) SWD by LWD 0.500 by 1.20 0.500 by 1.20 0.923 by 2.00 0.923 by 2.10 1.00 by 2.40 1.330 by 3.00
Percent Open Area 57% 25% 68% 63% 52% 63%
Strand Thickness (in.) 0.092 0.09 0.134 0.120 0.170 0.198
Strand Width (in.) 0.096 0.188 0.150 0.164 0.240 0.203
Weight (lbs/ft2) 1.47 2.82 1.80 1.71 3.50 2.50
Weight Galvanized (oz/ft2) 1.73 3.1 1.95 1.86 3.70 2.73
Expanded metal fence mesh panels have nine different categories.
EMF-07: Expanded metal fence with different categories can supply many choices for customers.
Expanded metal fence features
High security. Expanded metal fence can control access to protective places and become barriers such as anti-ram vehicle barrier, perimeter barrier and portable barrier.
Anti-corrosion. Expanded metal fence has three classes:
Class 1—uncoated
Class 2—hot-dip zinc coated (galvanized)
Class 3—Corrosion-resisting steel
Especially class 2 and class 3 have high anti-corrosion performance.
Application
Expanded metal fence systems for applications:
Commercial facilities
Industrial facilities
governmental facilities
institutional facilities
where the possibility of malevolent incursion
However, this type of fence system is not recommended for residential or public recreational facilities such as pools, schools, and kindergartens.
Green expanded metal fence is installed on the highway.
EMF-8: Expanded metal fence on the highway is to keep people secure.Expanded metal fence is installed between garden and forest.
EMF-9: Expanded metal fence between garden and forest is to separate two different areas and prevent tourists from missing.
In addition, expanded metal fence can be used for construction of new expanded metal fence systems and retrofit of chain link fences and retrofit of ornamental picket fence.
Retrofit of chain link fence uses raised expanded metal fence and is installed outside house.
EMF-10: Retrofit of chain link fence uses raised expanded metal fence to increase strength of chain link fence in order to keep people safe.Retrofit of picket fence uses flattened expanded metal fence and is installed outside factory.
EMF-11: Retrofit of ornamental picket fences uses flattened and expanded metal fence to increase anti-thieves property in order to keep factory secure.
Ordering/Specifying Information
When ordering or specifying expanded metal fence systems for security applications, you should supply the following items:
Mesh type.
Finish.
Mesh description.
Fence height.
Post size.
Horizontal rails.
Post spacing.