Fibergrate Fiberglass Grates

Typical Applications

  • Kennels
  • Kitchens
  • Pools/Spas
  • Saltwater/Marine
  • Playgrounds
  • Fencing
  • Resorts
  • Walkways
  • Aquariums
  • Drilling Platform
  • Catch Basin Seat
  • Wastewater Treatment
  • Storage Areas
  • Catwalks
  • Stairways
  • Underwater Structures

A versatile and sturdy alternative to metal options

Fiberglass Reinforced Plastic (FRP) is a material that has been found very useful in some trench drain grating applications. This strong, lightweight material is easily fabricated into grating for custom drain applications. It’s chemical and corrosion resistance puts it in a class with stainless steel, while being more cost effective. Think of using fiberglass grating in kennel drains, kitchen drains or drains exposed to salt water or coastal environments.
Fiberglass at Water park


Inexpensive compared to stainless steel
Durable – high load capacity options
Chemical/Corrosion resistant
Heat resistant
Slip resistance – Grit options
No value for scrap metal theft


There are an expansive amount of uses for fiberglass which allows us to cut sheets to size dependant upon your project requirements.

For special projects, call our experts for a more accurate lead time. Special variations and sizes may extend the lead time. 

It is also important to note that should the application require the fiberglass to be load bearing, contact our experts to determine span and load capacity.

No Steel to Steal or Corrode

Try replacing those areas with high load capacity fiberglass grating. Whether you need a large open area for fast draining or tight grate openings for ADA surfaces, Trench Drain Systems offers custom fiberglass products for your drainage application.Fiberglass grating can be molded into large sheets for later fabrication into smaller, custom shapes. Mesh grating is made by laying fiber reinforcing materials in grid work shaped mold and bonding them with polyester or vinyl ester resins. Other resins are available for special applications. The molded product is ground to the desired thickness and flatness. Slip resistant coatings are applied to the surface at this time, if required. Trench Drain Systems offers the following molded fiberglass grating products.

Fiberglass HLC High Load Capacity

High Load Capacity (HLC)

High load capacity molded grating is commonly used in applications where heavy loads (such as fork truck traffic) are encountered in corrosive environments. Also, HLC grating has been used in areas where cast iron grates are prone to theft, as they have no metal scrap value. HLC mesh (1″ x 2″) is made with high strength vinyl ester resins and come in 1.5″ and 2″ thicknesses. Non-slip surface coatings are available.” Open area is 48%. Grating weights are 6.2 and 8.4 pounds per square foot, respectively.

T Bar Drainage Grate

T-Bar Pultruded Fiberglass

Pultrusion is a fiberglass forming process whereby reinforcing fibers are pulled through an extrusion die while vinyl ester polymer resins are extruded under pressure. The act of “pulling” fiber while “extruding” resin leads to the term “pultrusion”. Fiberglass shapes made by this process come in long, continuous shapes. In the case of fiberglass grating, the shapes have cross-section akin to rectangular bars, tees and I’s. To make bar grating, these long bars are assemble parallel to each other and connected by structural cross members (known as tie bars) on 6″ spacing. A non-slip coating is applied to the grating after assembly.

This type of bar grating is especially good for pedestrian surfaces that need to be ADA approved. It is available in 1″, 1.5″ and 2″ bar thicknesses. Open area is mostly under 40%. T-Bar grating is available in 12% open area with a fine slip resistant coating that is used in water parks and boat dock decking.

Fiberglass Micro Mesh

Micro Mesh

A molded fiberglass with ¾ inch opens built on a 1.5″ x 1.5″ frame. It comes in 1″ and 1.5″ thicknesses. Micro-mesh can be made with or without a slip resistant coating. Open area for Micro-mesh is 44%. The weight is 2.9 lbs per square foot for the 1″ thick mesh and 4.5 lbs per square foot for the 1.5″ thick mesh. Micro-mesh is available in light gray and dark gray.

Fiberglass Square Mesh

Square Mesh Grating

Molded mesh grating is one of the most common types of fiberglass grating. It is available in a 1″, 1.5″ and 2″ square mesh. Thicknesses vary from ½” to 2″. And, resin types can be varied to meet your corrosion and fire resistant needs. For standard trench drain applications, polyester resins are used most often. Open areas for mesh grating range from 58% – 87%.


I-Bar Grating

Available in 1″ and 1.5″ heights, I-Bar load bar spacing is on 1″, 1.5″ and 2″ spacing, which also defines the open area of the grating.  I-Bar grating that have load bars on a 1″ spacing (I4010 and I4015) are ADA approved with 40% open area.” I-Bar grating is available in polyester resin (yellow) and vinyl ester resin (dark gray).

Fiberglass Bar Grate

High Strength I-Bar Grating

I-Bar grating is available for use in applications where heavy loads will be experienced.  Available in 47% and 58% open area (1.19″ and 1.5″ bar spacing), high load capacity bar grating is made in 1″, 1.5″, 2.0″ and 3″ thicknesses.  Slip resistant coatings are a standard feature for this product.

Fiberglass Rail and Grate Sytems

Pultruded grates and frames available in custom sizes.

Fiberglass rail and grate systems for poured trench drain systems provide many benefits. They are impact and corrosion-resistant, nonmagnetic, and non-conductive. The variety of grating options consists of a non-slip grit for traction that ranges from course for footwear or fine grit for bare feet.

The entire system is lightweight while offering durability to handle Load Class C traffic requirements (based on the current kit widths offered).

Trench Drain Systems offers fiberglass rails and grates in a variety of sizes and types of grates. This provides the opportunity to create custom depths and sloped channels. Fiberglass Kit Installation Guide

EZ and Wye Frames

The EZ frame has a set of low-profile anchors built in to help lock it securely into concrete during frame installation. It can be arranged to accept grates in heights of either 1″ or 1 1/2″.Wye frames have a traditional anchoring system in the shape of a “Y” that is similar to a nelson stud to secure the rail in concrete. These rails can be positioned in order to accept 1 1/2″ or 2″ thick grates.

Fiberglass EZ Frames
Locking Device

Grating Hold-down Clips

Stainless Steel (316SS) clips are made to lock-down each of the fiberglass grating types offered by Trench Drain Systems.  Type R and E Hold Down clips are made for I-Bar and T-Bar pultruded grating.  Type M clips are used with standard mesh grating.  Spring clips are available for applications where grates need to be removed and reinstalled without the use of hand tools.


Information Binder

Would you like information regarding our exclusive products? With over 50 pages of detailed information including specification sheets and decorative grating photos, this binder can be used as inspiration in your showroom or to specify your next project.

Request your Information Binder Today! (NEW! Request binder information on a flash drive)

Binder Request

Product Recommendations

10″ Fiberglass Kit w/ Mesh Grate and WYE Frame – Load Class C

Load Class C
System: Frame and Grate
Grate Material: Fiberglass
Grate Pattern: Mesh
Frame Edging: Fiberglass Frame
Grate Width: 10 inch
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10″ Fiberglass Kit w/ Micro Mesh ADA Compliant Grate and EZ Frame – Load Class C

Load Class C
System: Frame and Grate
Grate Material: Fiberglass
Grate Pattern: Mesh
Frame Edging: Fiberglass Frame
Grate Width: 10 inch
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10″ Fiberglass Kit w/ Micro Mesh ADA Compliant Grate and WYE Frame – Load Class C

Load Class C
System: Frame and Grate
Grate Material: Fiberglass
Grate Pattern: Mesh
Frame Edging: Fiberglass Frame
Grate Width: 10 inch
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