Fibrelyte®
Lightweight but robust, Fibrelyte’s Tier 8 load rating makes it the ideal underground enclosure for use in light-duty pedestrian applications.
Your Project Deserves Expert Attention

Overview
Lightweight Yet Durable Tier 8 Enclosure
Lightweight but robust, the Fibrelyte Tier 8 enclosure is designed to provide utility access in turf, walkway and other light-duty pedestrian applications, while also providing protection against incidental traffic from commercial landscape equipment and light trucks.
Built from a strong yet light polyester/fiberglass/calcium carbonite composite material, Fibrelyte offers weight comparable to plastic but delivers a greater strength-to-weight ratio than equivalent plastics that meet Tier 8 load ratings.
Fibrelyte is quick, simple and safe to deliver, handle and install, while also enabling on-site modifications to be carried out quickly with no need for specialist tools.
Need different performance? Find out which of our underground enclosures gives you the load rating you need: Underground Enclosure Load Ratings
Benefits
Lightweight yet durable
Fibrelyte was developed by our materials science experts to deliver Tier 8 load ratings—up to 8,000 lbs of vertical load and up to 600 lbs/ft2 of lateral load—in a lightweight unit.
Flared walls provide additional lateral strength, while also increasing below-ground volume.
Fibrelyte’s composite covers can meet up to 20,000 lbs of vertical loading, making them a valuable alternative to traditional Tier 8 polymer concrete covers.
Deliver, handle and install quickly and easily
Fibrelyte’s lightweight material composition makes manual handling easy, fast and safe.
Delivery, on-site handling and installation are straightforward and quick.
Modify easily in the field
Fibrelyte’s composite material is quick and easy to modify in the field using standard 18V tools.
No need for specialist equipment.
Get it fast
Our nationwide network of plants means that we have the scale to manufacture and stock a full range of products, meaning we can get your Fibrelyte units to site when and where you need them—and our local teams will work with you to make sure you have all the support you need.
Technical Information
- Application: Pedestrian
- Load rating: ANSI/SCTE Tier 8
- Vertical load: up to 8,000 lbs
- Lateral load: up to 600 lbs/ft2
- Materials: composite
- Cover: composite
- Dimensions, round: 9” diameter, 12” depth
- Dimensions, rectangular: 10”-48” width, 17”-30” length, 12”-24” depth*
* 18″ and deeper requires stacking
Specs & Downloads
Helpful Information
Product Sheets
- pdfFibrelyte® Sell Sheet
- pdfFibrelyte® FL03 Cover
- pdfUnderground Enclosures Line Card
Installation Guide
- pdfUnderground Enclosures Installation Guide
Videos
Name | Model | Height | Width | Length | Diameter | Downloads | Quote Generator | ||||
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Fibrelyte® FL08 | 12” | ” | ” | 8” | View | Added | ||||
PDF Fibrelyte® FL08
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Fibrelyte® FL09 | 12” | 15” | 10” | View | Add | |||||
PDF Fibrelyte® FL09
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Learn More | Fibrelyte® FL12 | 12” | 20” | 12” | View | Add | |||||
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Fibrelyte® FL30 | 24” | 13” | View | Added | ||||||
PDF Fibrelyte® FL30
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Fibrelyte® FL36 | 30” | 17” | View | Add | ||||||
PDF Fibrelyte® FL36
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Fibrelyte® FL09 Cover | ” | 15” | 10” | View | Add | |||||
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Fibrelyte® FL12 Cover | ” | 20” | 12” | View | Added | |||||
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Fibrelyte® FL1416 Cover | ” | 16” | 14” | View | Add | |||||
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Fibrelyte® FL30 Cover | ” | 24” | 13” | View | Add | |||||
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Fibrelyte® FL1527 Cover | ” | 27” | 15” | View | Add | |||||
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Fibrelyte® FL36 Cover | ” | 30” | 17” | View | Add | |||||
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Fibrelyte® FL03 Cover | ” | 14” | 9” | View | Added | |||||