What Are Traffic Sign Fixing Channels, and How Do They Work?

Traffic sign fixing channels are metal rails that mount traffic signs to posts. They are typically made of aluminum or galvanized steel. They are available in various sizes to accommodate signs of all sizes. Traffic sign fixing channels are essential to road safety, as they help ensure that traffic signs are correctly secured and visible to drivers.

The sign channel is attached to the back of the sign using rivets, screws, or bolts. It is then attached to the post or wall using the same fasteners. They help distribute the sign’s weight evenly and prevent it from twisting or warping.

There are two main types of traffic sign-fixing channel

• U-channel: U-channels are the most common type of traffic sign-fixing channel, using a long U-shaped metal or plastic strip to make it. The sign is inserted into the channel and then secured with bolts or rivets.
• C-channel: C-channels are similar to U-channels but have a closed back; this makes them stronger and more durable than U-channels but also more expensive.

When selecting a mounting channel for a traffic sign, it is crucial to consider the sign’s size and weight, as well as the surface where it will be mounted. For minor, lightweight signs, a U-channel is usually sufficient. However, in high-wind areas, C-channels are a better choice for larger, heavier signs because they are stronger and more durable than other mounting channels.

Benefits of Using Traffic Sign Fixing Channels

Strength and durability: Solid and durable materials, such as aluminum and galvanized steel, make the traffic sign fixing channel capable of withstanding the elements, including wind, rain, and snow.

Standardized Installation: The traffic sign fixing channel is relatively easy to install. It can be attached to signposts using rivets, screws, nuts, or bolts. Consistent use of sign channels simplifies installation across different signs and locations.

Versatility: You can find the traffic sign fixing channel in various sizes to accommodate signs of all sizes. It also allows you to mount signs to different posts, such as steel, aluminum, and wooden poles.

Prevent Detachment: Channels firmly anchor signs to resist strong winds and sudden impacts that could otherwise detach and topple them; this improves roadway safety.

Reduce Vibration: Fixing channels brace signs to minimize vibration that can loosen hardware and cause fatigue failures over time.

Simplify Maintenance: Signs are easily removed and replaced, reusing the same mounting holes, making maintenance workflows easier.

Adjust Positioning: Channels allow some flexibility in vertically adjusting the height or tilt of a sign on the post without needing to redrill.

How to Install Traffic Sign Fixing Channels?

• To install traffic sign fixing channels, you will need the following tools and materials: Traffic sign fixing channels, Sign, Post, Drill, Screwdriver or wrench, Rivet gun (optional), Rivets (optional), Nuts and bolts (optional)
• Please choose the right location for the sign: It should be placed where it is visible to drivers but does not obstruct traffic.
• Use a marker or spray paint to mark the location of the sign post on the ground.
• Drill a hole at the marked location using a drill the same size as the sign post, insert the sign post into the hole and tamp it down firmly.
• Attach the traffic sign fixing channel to the sign plate, and then attach the traffic sign to the post. You can use screws, nuts, or bolts.
• Take time to align and level the sign face properly before final tightening.

Here are some safety precautions to follow when installing traffic sign fixing channels

• It is imperative to wear safety glasses and gloves while working with tools and materials, and this will help protect your eyes and hands from potential harm.
• Be careful when drilling the hole for the sign post. Make sure that the drill bit is sharp and that the drill is level.
• Use caution when lifting and carrying the sign post and the sign.
• Always refer to manufacturer instructions for additional details. Some channels may have supplemental pieces like brackets or fittings for specialized applications.

Maintenance and Inspection

Like with all road infrastructure, periodic inspection and maintenance help maximize the useful life of traffic sign-fixing channels. Recommended practices include:

Visually inspect channels for damage during routine sign checks. Look for cracks, bends, or corrosion.

Ensure channel-to-post connections remain tight. Check for loose fittings or sagging.

Confirm sign faces remain correctly oriented and replace reflectivity as needed.

Spot clean channels with a wire brush and touch up any minor paint chips or corrosion.

Assess signs during severe weather events for evidence of excess vibration or movement.

Sizes and Strength Ratings

Traffic sign fixing channels come in various sizes to accommodate different sign types and wind load conditions. Typical sizes include:

• 60mm uniform channel – For small to mid-sized signs.
• 80mm heavy-duty channel – For larger road signs and high winds.
• 150mm oversized channel – For significant highway signs and signals.

Standard channel lengths range from 0.9m to 7.2m, and workers can cut the channels to size.

Load-bearing capacity is measured by

Thickness: Thicker-gauge steel handles more load but is heavier. 1 to 3mm is typical.

Span: Maximum spacing between 200-600mm mounting hole sets is typical.

Pull-out strength: Resistance against sign ripped out, 300-500N is standard.

When specifying channels, ensure they have suitable strength for the intended sign type and location.

Standards and Code Compliance

Several standards govern traffic sign fixing channels to ensure they uniformly provide adequate support.

The 2009 Edition of the Federal Highway Administration’s Manual on Uniform Traffic Control Devices (MUTCD) in the United States sets performance specs, testing protocols, and application guidance. The American Association of State Highway and Transportation Officials (AASHTO) further details the standards in the Specific Service Requirements.

These specifications define:

• Allowable materials and manufacturing methods
• Minimum thickness and strength ratings
• Maximum bolt-hole spacing and pull-out loads
• Hardware specifications and galvanizing durability
• Wind load factors and test procedures
• Approved post and substrate types

Sign-fixing channels used on public roads must be MUTCD-compliant. Rigorous wind tunnel and climate testing ensure channels meet the standards. FHWA certifies specific channel products that pass.

Internationally, countries follow standards from organizations like the ISO, CEN, or their government transportation agencies. The specifications are similar regarding materials, strength, and durability.