Heavy Duty Fiberglass Grating

Heavy Duty Fiberglass Grating

Check now

Heavy Duty Grating is used to covers areas with heavy traffic. We offer both Pultruded  Heavy Duty (HD) Grating and High Load Capacity (HLC) Molded Grating.

Our High Load Capacity (HLC) molded grating is heavy duty, corrosion-resistant and low-maintenance. It&#;s engineered to carry heavy traffic liketrucks and forklifts. Our molded HLC FRP Grating is available in 4&#; x 6&#; panels  1.5&#; or 2&#; deep in Polyester or Vinyl ester resin systems. HLC grating  has many advantages over steel grating for performance and cost effectiveness. With a much higher strength-to-weight ratio, molded HLC fiberglass grating is easy to handle, making for quick installation.

In stock at a distribution center close to you. National Grating distribution centers stock grating that satisfies general industrial needs all the way up to high load requirements like forklift traffic.

 

 

Curious about which fiberglass grating specifications are right for your project?

Download our Grating Selection Chart to help you find the right type of grating. To help you with load calculations, we have a handy molded grating load table PDF with information on the load capacities of different grating sizes.

We&#;re ready to answer any questions &#; use our Quick Quote Form.

Prefer to talk? Call us at 1-877-984-. We can help!

Molded Grating Resin Systems

National Grating Fiberglass Trench and Drain Grates are available in two standard resin systems. Each providing different levels of corrosion protection. Both resin systems meet Class 1 Flame Spread Rating per ASTM E-84 test standards.

Polyester: A premium-grade isophthalic polyester resin system that provides excellent corrosion protection. Standard colors: Dark Gray, Light Gray, Yellow, and Green. Equivalent to Fiberglass Grating Competitor Brand and Strongwell Duragrate PP.

Vinyl ester: A chemically resistant system that provides the highest level of corrosion protection. Standard colors: Yellow, Dark Gray, and Orange. Equivalent to Fiberglass Grating Vinyl Ester and Strongwell Duragrate VE.

 

Common Sizes and Applications

Common sheet sizes for FRP grating include: 4&#;x8&#;, 4&#;x12&#;, and 3&#;x10&#;. Common thicknesses include: 1&#;, 1.5&#; and 2&#;

Our molded FRP gratings have applications in many industries, including:

• chemical processing
• food & beverage
• marine
• oil & gas
• power
• manufacturing
• construction
• pharmaceutical
• metals & mining

• pulp & paper
• recreation
• water parks
• telecommunications
• IT server farms
• shipping centers
• transportation facilities
• water & waste treatment, and
• numerous architectural uses.

 

Strong, Lightweight and Corrosion-Resistant
Molded FRP Grating has the strength of steel, but it won&#;t corrode like steel can.

Safer Walking Surface for Trench Covers and Fiberglass Walkways
A coarse, gritted epoxy coating enhances traction.

Support and Stability
Molded Fiberglass Grating Panels are equally strong in both directions

Easy Fabrication
FRP Flooring Panels are lightweight, easy to transport, and can be cut and fabricated using standard hand tools.

Extended Life
The coated resin surface increases resistance to chemical corrosion and continuous UV exposure.

Bulk and Wholesale Discounts Available on Large Orders

 

Fast Delivery via our Superior Logistics Network

National Grating provides molded fiberglass grating, fiberglass tube, fiberglass angle and hardware to ALL USA States including California, Oregon, Alaska, Florida, New York, Illinois, Pennsylvania, Ohio, Georgia, Michigan, Virginia, Massachusetts, Arizona, Washington, North Carolina, Nevada, Texas, New Mexico, Indiana, Tennessee, Colorado, Maryland, Missouri, Wisconsin and Utah. Our pricing and service experts are standing by to help to find the best product for your project. With many varieties in stock and expedited shipping, we can supply your project with molded fiberglass grating at the best price.

Molded Fiberglass Grating Radio Frequency Transparency

In today&#;s connected world, we depend on cellular signals, Wi-Fi networks and over the air radio and television signals. Wi-Fi and Bluetooth connectivity are essential to on-site work environments. Steel structures significantly disrupt these signals. Molded Fiberglass grating is an essential part of FRP building structures that are &#;electronically transparent&#; and do not interfere with radio frequency transmissions.

We ship Molded Grating to all major cities including:

Texas: Houston, Dallas / Fort Worth, San Antonio, Austin, El Paso, Arlington, Dallas, and Brownsville

Florida: Jacksonville, Miami, Tampa, Orlando, and St. Petersburg

Georgia: Atlanta, Augusta, Columbus, Macon, Savanna, Athens, Sandy Springs, and Roswell

North Carolina: Charlotte, Raleigh , Greensboro , Durham , Winston-Salem , Fayetteville , and Cary

Suggested reading:
Alumina Silicate

You will get efficient and thoughtful service from Shengfei.

Massachusetts: Boston, Worcester, Providence, Springfield, Bridgeport, New Haven, Hartford

5 Things to Know Before Buying Conductive ABS Edge Banding

New York: Buffalo, Rochester, Monroe, Yonkers, Westchester, Syracuse, and Albany.

New Jersey: Newark , Jersey City, Paterson, Elizabeth, Edison, Woodbridge, and Lakewood

Illinois: Chicago , Aurora, Rockford , Joliet , Naperville, Springfield , Peoria, and Elgin

Virginia: Virginia Beach, Norfolk, Chesapeake, Richmond, Newport News, Alexandria, Hampton

Pennsylvania: Philadelphia, Pittsburgh, Allentown, Erie, Reading, Scranton, and Bethlehem

Indiana: Indianapolis, Fort Wayne, Evansville, South Bend, Carmel, Fishers, Bloomington, Hammond

Ohio: Columbus, Cleveland, Cincinnati, Toledo, Akron, Dayton , Parma , Canton, and Youngstown

California: Los Angeles, San Diego, San Jose, San Francisco, Fresno, Sacramento, and Oakland

Michigan: Detroit, Grand Rapids, Warren , Sterling Heights, Lansing Eaton & Ingham , and Ann Arbor

We can ship within 2 business days to the following:

Hartford, Nampa, Meridian, Idaho Falls, Bangor, Augusta, Manchester, Portsmouth, Concord, Providence, Newport, Warwick, Missoula, New Haven, Stamford, Anchorage, Juneau, Fairbanks, Burlington, and Cheyenne,Waterbury, Roanoke, Gary, Little Rock, Fayetteville, Hot Springs, Louisville, Des Moines, Cedar Rapid, Memphis, Knoxville, St. Louis, Kansas City, Baltimore, Annapolis

Lexington, Frankfort, Frederick, Birmingham, Mobile, Huntsville, Milwaukee, Madison, Green Bay, Minneapolis, St. Paul, Duluth Shreveport, Colorado Springs,  Bolder, Fort Collins, Columbia, Charleston, Mount Pleasant, New Orleans, Baton Rouge
Seattle, Spokane, Tacoma, Phoenix, Tucson, Scottsdale, Nashville, Portland, Eugene, Bend, Oklahoma City, Tulsa, Norman

Salt Lake City, Park City, St. George, Wichita, Topeka, Henderson, Carson City, Iowa City, Jackson, Biloxi, Gulfport, Albuquerque Santa Fe, Charleston, Billings, Bozeman, Wilmington, Dover, Newark, Sioux City, Rapid City, Fargo, Morgantown, Huntington, Boise, Bismarck

Whether it&#;s pultruded or molded, fiberglass-reinforced plastic (FRP) grating offers a strong yet lightweight solution perfect for commercial and industrial applications like floor systems, walkways, work platforms, stairs, ramps, trench covers and catwalks. More durable than steel bar grating, FRP grating features include corrosion, moisture and fire resistance, nonconductive and thermal insulating properties, and dimensional stability. FRP grating is much lighter than steel grating, making it easier to install and remove when access is needed below it. And because of its exceptional durability, FRP grating is extremely low maintenance &#; keeping operational costs for ongoing upkeep minimal.

But besides all these commonalities, there are some key differences between molded and pultruded grating.

Molded FRP Grating

Molded grating typically has a square mesh pattern, but it can also be cast in a rectangular mesh configuration. Molded FRP grating panels are also cast in one piece &#; meaning that there is no mechanical joint between bearing bars. This gives the grating exceptional bi-directional strength, aiding in its ability to offer a substantial load capacity. In addition, the surface of the grating can either come with a meniscus &#; or concave &#; surface or with a quartz grit slip-resistant surface for added safety. A covered grating surface is also an option for preventing objects and substances from falling to lower levels and for creating an odor barrier.

The Molding Process

When molded grating is created, layers of liquid resin and continuous fiberglass rovings are laid one after the other in a mold until the desired thickness and panel dimensions have been achieved. Once this is done, the mold is set aside to cure. When the curing process is complete, the panel is removed from the mold.

Bedford&#;s stringent quality control processes ensure that each piece of molded grating will provide superior durability. Additionally, the high resin-to-glass ratio (approximately 65% resin to 35% glass by weight) provides excellent service life, even in the most demanding applications.

Pultruded FRP Grating

Where molded grating is a single panel of resin and fiberglass layers, pultruded grating is composed of a series of parallel bearing bars &#; with either a T- or I-shaped profile &#; kept in place by several perpendicular cross-rods. The closer the bars are placed together, the stronger the pultruded grating panel is.

Besides being unidirectional in strength, pultruded grating can support heavier loads and longer spans than comparably sized molded grating &#; making it ideal for more demanding applications. This is because the continuous glass rovings in pultruded grating helps resist tension, compression and bending while providing longitudinal strength. The continuous glass mat also increases the grating&#;s transverse strength and resistance to impact.

How Pultruded Grating Is Made

From the pultrusion process to assembly, pultruded grating goes through a series of manufacturing steps before it reaches its final form.

Step 1: Reinforcement
The pultrusion process typically starts by pulling in two forms of fiberglass reinforcement. Creels of fiberglass roving provide unidirectional strength along the length of the profile while rolls of woven fiberglass mat provide multidirectional reinforcement. All reinforcements are fed through preforming guides that will begin to shape the raw glass fibers into the final bearing bar profile for the grating.

Step 2: Impregnation and Resin Bath
The fiberglass reinforcements are pulled through a bath of thermoset resin mix &#; typically polyester or vinylester &#; blended with pigments to add color, fillers and additives to enhance properties, and catalysts to aid in curing. The resin mix will soak and permeate the glass reinforcements, which is called impregnation or &#;wet out.&#; The resin will help in holding the glass reinforcement together and transferring the load between fibers. It also plays an important role in protecting the final product from corrosion and UV rays.

Step 3: Surface Veil
Just before all the fiberglass material is pulled into the heated die, a lightweight polyester fabric &#; also called a surface veil &#; is added. The surface veil helps provide a smooth, more durable resin-rich surface in the final product &#; enhancing the product&#;s environmental and chemical resistance. The surface veil does not, however, provide additional structural strength.

Step 4: Curing and Cutting
After the surface veil is added, wet-out reinforcements are pulled through the heated pultrusion die, which begins the thermosetting process &#; causing the resin to &#;cure&#; or harden. By the time the material exits the die, a solid bearing bar with a rigid T- or I-shaped profile will have been formed with all the reinforcements laminated inside. The cured bearing bar is then pulled to the cut-off saw and cut to the appropriate length.

Step 5: Assembly
Holes are drilled every six inches along the length of the bearing bars. The cross-rods are then inserted through the holes &#; perpendicular to the bearing bars &#; and secured with epoxy. Together, the bearing bars and cross-rods make up the grating panels.

The Key Differences

The biggest differences between molded and pultruded grating stem from the differing manufacturing process. The molding process allows molded grating to be produced in single, made-to-size panels with exceptional bi-directional strength. The pultrusion process, on the other hand, reduces potential errors in production &#; creating a consistent, high-strength FRP grating product. Pultruded grating can also support heavier loads and longer spans than comparably sized molded grating &#; despite being unidirectional in strength.

Additionally, while pultruded grating is the stronger and stiffer option, molded grating provides more flexibility, corrosion resistance and impact resistance. Watch the video for a more comprehensive comparison of these two types of grating.

Regardless of their key differences, both types of FRP grating feature exceptional durability and strength as opposed to more traditional building materials like steel. And when choosing between molded and pultruded grating, the main thing to consider is the type of application.

Looking for more information about Bedford&#;s molded and pultruded grating products? Contact us or browse the available resources below.

Learn more about our FRP Grating Products

FRP Grating Resources
Download the FRP grating catalog, data sheets and other technical documents from our Resources page.

Stair Treads and Stair Tread Covers
Bedford offers a variety of molded and pultruded grating stair tread panels that are easy to cut and quick to install.

FRP Grating Clips
Bedford offers several types of stainless steel and FRP fasteners to secure our molded and pultruded grating products in place.

FRP Grating Pedestals
For applications requiring an elevated grating floor system, Bedford offers a variety of adjustable and fixed pedestals.

FAQs

What is molded grating?
Molded grating typically features a square or rectangular mesh pattern. Molded FRP grating panels are also cast in one piece without a mechanical joint between bearing bars &#; giving the grating exceptional bi-directional strength.

What is pultruded grating?
Pultruded grating is composed of a series of parallel bearing bars &#; with either a T- or I-shaped profile &#; kept in place by several perpendicular cross-rods. The closer the bars are placed together, the more unidirectional strength the pultruded grating panel provides.

What's the difference between molded and pultruded grating? 
The biggest difference between molded and pultruded grating is in the manufacturing process. The molding process allows molded grating to be produced in single, made-to-size panels with exceptional bi-directional strength. The pultrusion process creates a consistent, high-strength FRP grating product that can also support heavier loads and longer spans than comparably sized molded grating.

Want more information on Custom Heavy-duty molded grating Factory? Feel free to contact us.