Aluminum Fixed Trailer Mounted Attenuator
The RMHs Fixed Rear Guard is a heavy-duty rear underride protection
device specifically engineered for road maintenance vehicles. Its
primary function is to establish a robust passive safety barrier
for work crews—including maintenance, cleaning, and emergency
response teams—temporarily stationed adjacent to active traffic
lanes.
Utilizing a patented aluminum honeycomb energy-absorption
structure, it efficiently absorbs impact energy during rear-end
collisions, effectively preventing smaller vehicles from
underriding the truck bed to protect lives and equipment.

Product Specifications
| Item | Specification |
|---|
| Product Model | Fixed Rear Guard |
| Brand | RMHs |
| Standard Dimensions (W * D * H) | 1850 * 635 * 450 mm (Customizable) |
| Net Weight | 96 kg |
| Main / Energy-Absorbing Material | High-Quality Aluminum Alloy |
| Core Structure | Patented Honeycomb Energy-Absorption Structure |
| Primary Functions | 1. Efficient Impact Energy Absorption (Underride Prevention) 2. High-Intensity Active Warning |
| Installation Method | Suspended Mounting, Bolted to Vehicle Rear |
| Warning System | Engineering Yellow + High-Intensity Reflective Sheeting + Dual LED
Strobe Lights |
| Mobility Design | Bottom Wheels, Side Hand Grips |
| Key Feature | Energy-Absorbing Module Supports Professional Refurbishment and
Reuse |
| Certification | Passed Japanese Road Safety Testing, Complies with International
Standards |
Product Advantages
- Authoritative Certification, Safe & Reliable: All products pass stringent road safety testing in Japan, with
performance complying with international standards, providing
authoritative safety assurance.
- Recoverable Core, Economical & Durable: Features a patented honeycomb energy-absorption structure that can
be professionally refurbished and reused after moderate-intensity
collisions, breaking traditional "disposable" limitations and
significantly reducing long-term ownership costs.
- Active Warning, All-Weather Protection: Integrates high-intensity LED strobe lights and large-area
engineering-grade reflective sheeting to form a dual "active +
passive" warning system, ensuring exceptional visibility in
low-light conditions.
- Lightweight yet Robust, Easy Deployment: Constructed from all-aluminum alloy, achieving optimal balance of
high strength and lightweight design (96kg). Equipped with wheels
and hand grips for quick, single-operator movement and positioning.
- Customizable on Demand, Perfect Compatibility: Offers comprehensive customization services for dimensions, color,
interfaces, and markings, ensuring seamless integration with
various specialized work vehicles.
Core Value: The RMHs "Fixed Rear Guard" is not just a safety device but a
cost-effective long-term investment. It achieves breakthroughs in
critical areas of safety, economy, and adaptability, providing
reliable protection solutions for road work that far exceed
conventional standards.

Performance Comparison
| Comparison Dimension | General Products / Common Industry Points | Core Advantages of RMHs "Fixed Rear Guard" |
|---|
| Safety & Certification | • Relies on manufacturer's self-declaration • Lacks authoritative, verifiable third-party crash test reports • Inconsistent performance and unstable quality | • Backed by Authoritative Certification • All products pass stringent road safety testing in Japan • Performance complies with international standards |
| Core Protection & Cost-Effectiveness | • "Disposable" Design after collisions • Extremely high single-incident costs • Unclear protection rating | • Revolutionary Recoverable Design • Energy-absorption module can be professionally refurbished • Reduces single-incident costs by over 70% |
| All-Weather Warning Effectiveness | • Relies on basic passive reflective sheeting • Warning distance decreases in poor conditions • Reflective sheeting prone to aging and failure | • Dual "Active + Passive" Warning System • High-intensity LED strobe lights and premium reflective sheeting • Exceptional visibility under any lighting condition |
| Long-Term Durability & Usability | • Steel body heavy and prone to rust • Short outdoor service life • Requires 2-3 personnel for movement | • Integrated Lightweight & Durable Construction • All-aluminum alloy body with excellent corrosion resistance • Single-operator efficiency with wheels and hand grips |
| Adaptability & Flexibility | • Limited standard models available • Difficult to match special vehicles or non-standard mounting
points | • Deep Customization Service • Complete personalized solutions for dimensions and interfaces • Perfect compatibility with operational scenarios |

What is an Aluminum Fixed Trailer Mounted Attenuator?
As a mobile anti-collision protection device, it features
high-quality aluminum alloy as its core material and is
specifically designed for trailer mounting. Equipped with an
advanced energy-absorbing structure, it can absorb collision
kinetic energy in a stepped manner when accidental vehicle impacts
occur. This effectively minimizes damages to construction
personnel, road equipment, and the striking vehicle, making it an
essential safety solution for temporary work scenarios such as road
construction and maintenance.
Why Is Aluminum Alloy Selected as the Core Material?
Aluminum alloy stands out as the optimal material choice due to its
three key advantages:
- Lightweight Property: Significantly reduces device self-weight compared to traditional
steel structures, simplifying trailer towing and on-site relocation
while optimizing fuel efficiency.
- Superior Corrosion Resistance: Excellent adaptability to harsh outdoor environments including
high humidity and salt spray, prolonging service life and reducing
maintenance costs.
- High Structural Strength: Fully meets mechanical performance requirements for collision
buffering, ensuring stable deformation and reliable protection
during impacts.
What Is the Core Protection Mechanism?
The device integrates a multi-stage energy-absorbing system that
operates scientifically upon impact: First, the outer buffer beam
dissipates initial impact force, then internal energy-absorbing
boxes and honeycomb aluminum structures compress and deform
progressively, converting kinetic energy into structural
deformation energy. This critical design avoids massive impact
forces from rigid collisions, providing comprehensive protection
for all parties involved.
Key Points for Daily Maintenance
To ensure optimal performance throughout its service life, the
following maintenance measures are recommended:
- Conduct regular inspections to ensure all connection point bolts
remain securely fastened.
- Keep the device surface clean by promptly removing dust and oil
stains to prevent coating damage.
- Immediately replace damaged energy-absorbing components after
collisions—deformed structural parts must not be reused.
Applicable Scenarios
This product is widely applied in various safety-critical
scenarios, including but not limited to:
- Safety protection for temporary construction and maintenance zones
on expressways and national highways
- Safety isolation for municipal road emergency repairs and hazard
clearance sites
- Anti-collision protection for temporary operation points, such as
tunnel entrances and toll station reconstruction/expansion projects