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Z-Post 4 Rope System & WRGT-FL

The NCHRP 350 tested Z-Post System and Wire Rope Gating Terminal - Flared (WRGT-FL) utilize a Z shaped post design. Tested to TL-4 on flat grade, it's considered by FHWA to be a TL-3 compliant system when placed on slopes up to 4:1 or flatter. The top rope rests in a slot while the 3 lower woven ropes are positioned at 6" intervals using plastic pegs. The friction from the weave keeps the ropes at design heights, while the force of an impact increases the post/rope friction coefficient resulting in predictable deflections regardless of anchor spacing. Since no hardware connects the ropes to the post it eases maintenance/repairs and results in fewer parts to assemble and inventory.

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WHY Brifen Z-Post TL-4?

  • Patented interwoven cables

    • Creates high rope/post friction and causes each post to act as a “mini-anchor”

    • Better performance on curves

    • Eliminates need for intermediate anchors

    • Deflections are more predictable

    • Limits extent of damage

  • Does not impede drainage and reduces wind row from snow or sand

  • Cost-effective compared to other longitudinal barriers

  • Rarely results in serious injury to vehicle occupants

  • No metal attachments that may create hazardous debris upon impact

  • No field swaging or hardware assembly required to connect ropes

Z-Post Wire Rope Safety Fence (WRSF)

NCHRP 350 TL-4

The Z-Post system is a high-tension median or roadside cable barrier system successfully tested to TL-4 and TL-3 on flat grade and to TL-3 on a 4:1 slope per FHWA Eligibility Letters HSA-10/B-82B, B82-B1 and B-82D. The Length of Need (LON) consists of Galvanized Steel Z-Posts, also called Line Posts, which are placed in socketed concrete foundations or driven steel sockets.

The top rope rests in a slot in the top of the post and the three bottom ropes alternate post sides, while resting on plastic pegs. Line posts also have a plastic excluder and post cap with a reflector attached at required intervals per agency requirements. The woven rope design improves system performance and ease of maintenance while providing predictable deflections regardless of length between terminals.

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Wire Rope Gating Terminal (WRGT-FL)

NCHRP 350 TL-3

Brifen's WRGT-FL flared terminal is crashworthy per FHWA Letter HSSD/CC-86B. It can be located anywhere within the clear zone and has all ropes anchored into one foundation. The WRGT-FL end terminal is made up of four posts with an overall length of 28ft and includes a large concrete foundation (drilled shaft or spread footer) that is offset 2ft away from the nearest traffic.

Site specific soil analysis by a Professional Engineer is imperative for proper foundation sizing to prevent anchor movement and provide adequate factor of safety when rope tension increases at lower temperatures.

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Specs

Z-Post Wire Rope Safety Fence (WRSF)

Safety Rating:

Post Type:

NCHRP 350 TL-4

Z-Series

Wire Rope Gating Terminal (WRGT-FL)

Safety Rating:

Post Type:

NCHRP 350 TL-3

Z-Series

**Product Manual and System Drawings available though the Portal.

Parts List

Main Picture
Part
Part #
Complete WRGT Anchor Assembly Modified
WRGT4
Anchor Plate with Bolts
WRGTA3
Coupler Fitting Assembly
WRGTA1-C
Post 1 Anchor Post-Left Shoulder (TL-3 & TL-4)
F11AL
Post 2 Anchor Post-Left Shoulder (TL-4 Only)
4F11B1L
Post 3 Anchor Post-Left Shoulder (TL-4 Only)
4F11B2L
Post 4 Anchor Post-Left Shoulder (TL-4 Only)
4F11B3L
Retainer Pin
W86
Combination Fitting Assembly
WRGTA1
Prismatic Reflector Amber (For Post Cap)
A82
Z Post Cap
Z80
Z Post Locating Peg
A42
Z Post Excluder
Z41
Z Post Socket - Plastic
Z40P
Z Post Socket - Galvanized Steel
Z40
Z Line Post Socketed Left Shoulder (Wide Slot)
Z15L
Z Line Post Socketed Left Shoulder
Z11L
Cable End Anchor Nut
A74
Mechanical End Anchor Cable Fitting
A71
Cable Spice
A53
Mechanical Threaded Terminal - Right Hand Thread
A54R
Mechanical Threaded Terminal - Left Hand Thread
A54L
Rigging Screw (Turnbuckle)
A52
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