UK Office Tel: + 44 (0) 1756 799 773, US Office Tel: + 1 800 422 2525
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Why Fibrelite?

Fibrelite has been at the forefront of composite quality and innovation since 1980 when we designed the world’s first FRP composite manhole cover for the retail petroleum industry. And our high-performance, lightweight and safe-to-lift composite covers – including the unique F900 load-rated trench cover – are now selected by specifiers, architects and engineers worldwide.

Scroll down this page to read more about our trench cover range.

View Our Extensive
Trench Cover Range
F900 load rated Fibreilte covers installed at the UK’s largest por
F900 Fibreilte covers installed at the UK’s largest port
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Fibrelite covers installed in UK’s most iconic theatre
Fibrelite covers installed in UK’s most iconic theatre
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Load Ratings from 3,400lb / 1.5 tonnes to 202,000lb / 90 tonnes
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Super Heavy Duty (E600)
For loads of up to
135,000lb / 60 tonnes
Super Heavy Duty (E600)
For use in areas where high wheel loads are imposed such as loading areas
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Standard Duty (HS20/C250)
For loads of up to
56,000lb / 25 tonnes
Standard Duty (C250)
For use in car parking lots, gas stations, industrial sites and areas with slow moving traffic
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Light Duty (B125)
For loads of up to
28,000lb / 12.5 tonnes
Light Duty (B125)
For use in car parking lots and pedestrian areas where only occasional vehicular access is likely
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Super Light Duty (A15)
For loads of up to
3,400lb / 1.5 tonnes
Super Light Duty (A15)
For use in areas where only pedestrians have access
For loads of up to
202,000lb / 90 tonnes
Extreme Heavy Dty (F900)
For use in areas where extremely high wheel loads are imposed such as docks
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Extreme Heavy Duty (F900)
For loads of up to
90,000lb / 40 tonnes
Heavy Duty (HS25/D400)
For use in areas with frequent bus or heavy truck traffic, including carriage ways, hard shoulders and pedestrian areas
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Heavy Duty (HS25/D400)
For loads of up to
40,000lb / 18 tonnes
Standard Duty US (HS20)
For use in traffic service areas as per AASHTO standard
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Standard Duty US (HS20)
For loads of up to
11,200lb / 5 tonnes
Medium Light Duty
For use in raised curb locations where light vehicular access is a possibility
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Medium Light Duty
Why Choose a Fibrelite Trench Cover?

Although FRP composite covers are now increasingly preferred to the traditional metal or concrete options - not every composite cover is going to perform to the highest standards year after year.

With a Fibrelite trench cover you can be sure that you have a high performance product created via resin transfer molding (RTM) to create a durable, monolithic cover that you can fit-and-forget. What’s more, each one will have been individually engineered under the watchful eye of our technical teams in our own manufacturing facilities in the UK, USA and Malaysia.

Download our European Trench Cover Technical Guide

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Accreditations

Fibrelite has held accreditation to the ISO quality standard (ISO 9001:2008) and British Standards Kitemark since 1998 and this commitment to product excellence enables us to provide the most comprehensive range of high strength modular and custom-made trench covers with the very best strength to weight ratio available in the market today.

Our covers:
  • exceed H20 and H25 load rating standards
  • are BS EN 124 compliant
  • are BSI Kitemark approved products
Technical Resources

Each product is fully supported with dimensional product drawings and installation instructions which you can access by following the links from each product page on this website or by contacting us directly via phone, email or contact form.

Technical Resources
Our Load Test Reports

All our trench covers are independently tested in accordance with BS EN 124 criteria and not only meet but often surpass the relevant class conditions for deflection under load as demonstrated in the reports.

Trench covers supplied for use in the US have also been independently tested to ensure that they meet AASHTO (American Association of State Highway & Transportation Officials) standards.

View our Load Test Reports
Watch the Video

Our Load Test Reports
A Product that Lasts, but Don’t Just Take Our Word for it…

An 18" square, raised cover manufactured and supplied by Fibrelite was put through testing as specified in BS EN 124 after 14 years solid service on a high-traffic forecourt. The test report confirms the cover easily passed and it was notable that the orange color had not faded, indicating that weathering and UV have no or very little impact on the performance of the Fibrelite cover over a sustained period.

Read the Test Report

Testimonials:

Tom Finnegan, Contracts Manager, Dakin Contractors

Jonathan Size, Foster Wilson Architects

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A Product that Lasts, but Don’t Just Take Our Word for it…
Fibrelite in the Press

A quick round up of some of the Fibrelite stories which have made the news around the world. To read more please click here to go to our news page.

Read more about our trench cover installations for water facilities:
Edie.net
Waterworld


Read more about our trench cover installations in a US Data Centre:
Facilitiesnet.com
Jeccomposites.com


Read more about our recent manufacturing performance:
net.composites.com
Composites in Manufacturing
Durability

Designed as a ‘fit-and-forget’ product, our FRP composite covers are maintenance-free, durable and very strong as a matter of course.

Read our Wear Resistance Test Report
(Refer to clause 3.2.1 and 3.2.2, Page 14)

Read our Impact Resistance Test Report
(Refer to clause 4.2, Page 15)

Durable Trench Covers
Fully Conductive Options

Potential electrostatic discharging can be eliminated by using the “fully conductive” Fibrelite cover which uses a metalized fibre within the moulding process to achieve electrical continuity across the entire surface of the cover. Such covers exceed the surface resistivity requirements of PAS26.

The standard calls out for a maximum value of 1 KΩ/cm², the Fibrelite cover actually achieves a value of 0.0144 KΩ/cm².

Read our Conductivity Test Report
(Refer to clause 3.1.5, Page 14)


Fully Conductive Options

Corrosion Resistance

A prime reason for selecting a composite cover is because of its inherent resistance to corrosion making it an obvious choice where water, wastewater or corrosive liquids are involved. They are also ideal where underground infrastructure requires protection from external corrosive compounds such as salt.

Read our Corrosion Resistance Test Report
(Refer to clause 3.1.5 & 4.4, Page 14 & 15)

Corrosion Resistance
Skid Resistance

Independent wet and dry tests carried out by Devon CC Materials Laboratory showed that Fibrelite trench covers – even when wet - had anti-slip properties equivalent to a modern high grade road surface which far exceeds health and safety advisory limits.

Read our Skid Resistance Test Report

A Product that Lasts, but Don’t Just Take Our Word for it…
Heat Resistance

The thermal gradient properties of a composite steam cover significantly reduces the heat transfer from a steam vault to the surface of the cover. Typically the surface temperature of a composite cover is only slightly above ambient temperature, even when subjected to extremely hot temperatures on the underside.

In fact, the best high-quality Fibrelite steam covers maintain their cool-to-touch properties and ability to support vehicular loads even when pushed to a test temperature 400°F.

Read our Heat Resistance Test Report

Heat Resistance
Benefits in Summary
World’s Largest Range

Our trench covers are available in a range of widths from 300mm (12") to 1000mm (40"); a range of lengths from 600mm (24") to 1800mm (72") and depths from: 50mm (2") to 203.2mm (8"). Bespoke sizes are also available. Load ratings available from A15 to F900.

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Heat Resistance
No Risk of Theft

There is no risk of theft with a Fibrelite composite cover as composites have no resale value in the scrap market - so you won’t be left with a dangerous, uncovered hole in the ground.

No Risk of Theft
Ergonomically Designed Lifting Handle

As well as being lightweight – typically a third of the weight of an equivalent-size cover produced in metal or concrete - the ergonomically designed lifting aid has the added benefit of eliminating the risk of back injury and crushed fingers.

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Ergonomically Designed Lifting Handle
Colored Covers for Easy Identification

Fibrelite composite covers can also be molded in virtually any color or color-combination and as the pigment is added into the resin during manufacture, there are no problems with the color scratching or fading over time.

This means that covers can incorporate logos and/or be color-coded to match a facility’s branding or even to identify the specific underground service that can be accessed via a particular cover.

Read our Test Report
(Refer to clauses 3.2.1 to 3.2.3, Page 14)

Custom coloured trench covers - green
Custom coloured trench covers - yellow
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Custom logos 1
Lockable

Locks and restraining bolts available for added security.

Lockable Covers
Bolted covers
Frame or Rebate Installation

Can be installed onto our specialized frame or existing rebate.

Frame Installation
Rebate Installation
Configurations

Covers can be custom molded to accomodate pipework entry, shallow depths with stepped cover profiles, steam and gas release vents, inspection ports and much more.

Apertured covers
Fibrelite covers can be molded and shaped to accommodate almost any trench opening
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Configuration 2
 
Configuration 1
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