Interstate Gratings is pleased to offer a complete line of fiberglass grating and accessories. Combining strength with unmatched corrosion resistance, fiberglass gratings are offered in two distinct product lines, molded or pultruded. Popular applications for fiberglass grating include:
Manufactured by drawing glass rovings through a resin bath and heated dies, pultruded shapes are assembled into a grid using a mechanical and chemical lock. The resulting product has superior strength and reliable corrosion resistance. Popular load bars are “I” or “T” shaped with a standard slip-resistant grit walking surface.
Iso-FR – Isophthalic polyester resin with a flame spread rating of 25 or less. Designed for applications where there is moderate exposure to corrosive elements.
Standard colors: Yellow or Dark Gray
VE-FR – Vinyl ester resin with a flame spread rating of 25 or less. Dependable resistance to both acidic and alkaline environments.
Standard colors: Yellow or Dark Gray
Manufactured by weaving alternating paths of fiberglass rovings through a resin-flooded mold, molded gratings offer maximum corrosion resistance and bi-directional strength. Lightweight and easily fabricated with common hand tools, installed molded gratings are essentially maintenance-free.
Iso-FR – Economical fire resistant isophthalic resin meets the corrosion resistance requirements found in light industrial and water/wastewater applications. Flame spread rating is 25 or less.
Standard colors: Green, Dark Gray, Light Gray, Yellow
VEFR – Premium fire retardant vinyl ester resin provides reliable performance in the toughest environments. Excellent performance in caustic and acidic environments with a flame spread rating of 15 or less.
Standard colors: Dark Gray, Orange
FGFR – Food grade isophthalic resin meets the unique requirements of the food and beverage industry. Flame spread rating is 20 or less.
Standard color: Light gray
Interstate Gratings full line of safety grating includes standard plank, stair treads, ladder rungs, walkway channels and flat sheet flooring for industrial applications. Attributes that make safety grating a preferred choice include:
All safety grating products are available in the following materials:
Manufactured with a standard serrated diamond matrix, Super Grip provides exceptional slip-resistance in all directions. A plain surface diamond matrix is available on special order.
Manufactured with a uniform pattern of large de-bossed holes surrounded by slip-resistant perforated buttons.
Manufactured with a walking surface consisting of hundreds of perforated buttons, Super Tread provides slip-resistance in all directions.
Flat sheet flooring manufactured with hundreds of slip-resistant perforated buttons. Ideal for overlay on existing work surfaces, ramps or stairways.
Riveted Gratings are manufactured by cold-press riveting straight bearing bars to crimped rectangular flat bars. Our oldest products, riveted gratings offer superior resistance to impact, fatigue and repetitive loads.
Riveted gratings are available in carbon steel, 6000 series aluminum and 300 series stainless steels. These products are manufactured with bearing bars spaced either 1-1/8″ or 3/4″ apart and the standard rivet spacing is 7 inches on center. Optional close rivet spacing of 3-1/2″ on center is also available.
The standard method of manufacturing serrated riveted grating is to serrate the crimped cross member. When assembled, these cross members are raised slightly above the top surface of the bearing bars to provide a superior unidirectional slip-resistant surface. If your application is particularly prone to unsafe walking conditions, consider specifying “100% Serrated” grating where both the bearing bars and cross members are provided with serrations.
Manufactured from aluminum extrusions, “LG” series louver grate is designed to offer an economical solution for architectural applications. Available in four popular patterns with total or partial visual concealment, all “LG” series products offer a minimum 63% open air flow. Popular applications include:
The unique flexibility of the “LG” series allows architectural freedom for both vertical and horizontal applications. Vertical applications allow for maximum air flow and resist the accumulation of snow, rain, dirt and debris. Screening of parking structures and visual concealment of unsightly ventilation or mechanical equipment is easily accomplished. Installed horizontally, the multiple tilt patterns provide options for sunscreens and building facades. Once again the high percentage of open area allows for important air circulation and the free passage of moisture.
The natural corrosion resistance and beauty of mill finish aluminum can be enhanced with clear anodizing. Other popular anodizing options include light and dark bronze shades. Powder coating, epoxy and Kynar finishes are available in the complete RAL color palette. Properly applied, these finishes offer years of continuing service in colors designed to complement the look and feel of adjacent architecture.
“LG” series products are easily fabricated to any size and configuration. Radial or diagonal cuts accommodate “free-form” design beyond simple squares and rectangles. Louvers can be welded into component framework and quickly bolted to the supporting structure with limited field labor. All fabrication can be completed prior to coating, maximizing the integrity of the finish.
Type “SL” steel gratings are manufactured by inserting hollow tube cross bars into pre-punched holes in the bearing bars and swaging the cross bars forming a positive mechanical connection. The cross bars are recessed below the top surface of the bearing bars providing a uniform and attractive architectural appearance. Swage locking is a particularly efficient process for the production of close mesh gratings. Type 7-SL-4 with 3/16″ thick bearing bars provides a net 1/4″ clear opening between the bearing bars. This narrow opening is often preferred in public areas where concerns of drainage and the presence of high heeled shoes converge.
The most widely used aluminum grating, type “SG” rectangular bar provides clean, crisp lines and the cross bar is fully locked within the bearing bar, slightly below the top surface. Type 19-SG-4 aluminum grating is the industry recognized standard for industrial applications with nearly 80% open area. Type “SG” gratings are available in close mesh ADA conforming spacings 11-SG-4 and 7-SG-4 which are commonly used in public areas. When specifying type 11-SG-4 for ADA applications, 3/16″ thick bearing bars must be specified.
Manufactured with highly efficient “I” shaped extruded bearing bars, type “SGI” aluminum grating carries the same load as 3/16” thick rectangular bar type “SG” aluminum grating, but weighs slightly less per square foot. Additionally, the striated top and bottom flanges of the “I” bar provide enhanced skid resistance without the cost of serration.
Manufactured with a unique, extruded cross bar that is flush with the top surface of the bearing bars after swaging, type “SGF” aluminum grating provides an enhanced walking surface for areas subject to continuous pedestrian traffic. Available in rectangular bar with plain or serrated surfaces, type “SGF” aluminum grating is also available in ADA conforming spacings for applications located in the public way.
Hollow tube cross bars are hydraulically swaged into pre-punched holes in the bearing bars to make type “SLS” swage locked stainless grating. This type of construction provides a secure bearing bar/cross bar intersection and products are available with bearing bar spacings ranging from 19/16″ (1-3/16″) to 7/16″ on center.
This attractive grating, with the swaged cross bars slightly below the top surface of the grating, is very popular for “close-mesh”, ADA conforming applications. Consider “11 space” or “7 space” gratings for vault covers or entrance mats located in the public way.