Type "SL" Swage Locked Steel Grating

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Steel Bar Grating

Steel Bar Grating is manufactured from ASTM A-1011 mild carbon steel and is available in three distinct products, type "W" Welded Bar Grating, type "DT" Dovetail Pressure Locked Grating, and type "SL" Swage Locked Grating. All three products are available with bearing bar spacing ranging from 19/16" (1-3/16") to 7/16" on center and with cross bars at either 4" or 2" on center. Each product is available with the standard plain or optional serrated surface, and each product is available with a bare steel, painted or galvanized finish. The following Steel Load Tables provide detailed product specification information related to all three products.

Type "W" Welded Steel Grating

Our most economical steel grating products, type "W" Welded Steel Gratings are manufactured by forge welding rectangular bearing bars and drawn cross bars. This welding process provides a positive fused connection providing years of service under the most demanding conditions. Type 19-W-4 steel grating is our most popular product and is recommended for nearly all industrial flooring applications. With nearly 80% open area, 19-W-4 allows for the easy passage of dirt, debris, snow and liquids and is essentially self-cleaning. Type "W" gratings are available in close mesh ADA conforming spacings 11-W-4 and 7-W-4 which are commonly used in public areas. When specifying type 11-W-4 for ADA applications, 3/16” thick bearing bars must be specified.

Type "DT" Dovetail Pressure Locked Steel Grating

Type "DT" steel gratings have deep rectangular cross bars and are manufactured by inserting pre-punched bearing bars and cross bars into an “eggcrate” configuration and deforming the cross bars under intense hydraulic pressure. The deep cross bars on type "DT" gratings make them popular for architectural applications such as sun shades and infill panels with the deeper cross bar serving as a distinct architectural accent.

Type "SL" Swage Locked Steel Grating

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.

Galvanized Steel grid will always be the proper choice for many project categories.  Strength, long service life, ease of installation and relatively low cost make welded steel grating the most popular of all grating types.

Note: Stainless steel grid is also available for use in corrosive environments.

Rugged, One-piece Steel Bar Grating

Most Galvanized steel grating is manufactured by an automated resistance-welding process under extreme heat and pressure, literally fusing the cross bar/bearing bar intersections together to form a rugged, onepiece panel. The surface remains uniform to accommodate foot or vehicular traffic. Welded bar grating is commonly used in industrial plants and commercial buildings for walkways, platforms, mezzanine decking, safety barriers, trench covers and ventilation grates. OEM applications such as steps, guards or grilles. Standard panels, suitable for general flooring applications, are available in carbon or stainless steel in widths of 24" or 36", with bearing bars spaced at 1-3/16", 15/16" or 11/16".

Close-mesh Galvanize steel grating: 

Suitable for applications requiring narrow bearing bar spacing for aesthetic or functional reasons, such as handling heavier loads, meeting ADA requirements for wheelchair accessibility or accommodating any style of footwear.

Serrated bars Gratings

Often chosen for extra traction and slip-resistance are available in all sizes. An abrasive  anti-slip surface is also available.

Steel Grating Finish

The standard is unfinished (mill finish). Hot dip galvanized, painted, powder coated or special finishes are available. In some applications, stainless steel grating may require secondary finishing, such as chemical cleaning, abrasive blasting or electropolishing.

Hot dip galvanized steel Gratings

Hot-dip galvanizing is the process of coating  steel grids with a thin zinc layer by passing the steel through a molten bath of zinc at a temperature of around 860  F (460 C). When exposed to the atmosphere, pure zinc reacts with oxygen to form zinc oxide, which further reacts with carbonate, adult grey, fairly strong material that stops further corrosion in many circumstances, protecting the steel below from the elements .

Bearing Bar size Selection Guide

Common steel grids size

Common steel bar gratings details

Galvanized Steel grating

Hot dip galvanized Steel grids

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We care about your order - small or large.  For assistance / input regarding load requirements and other considerations, we hope you'll give us a call or live your phone number in your email for we call back. 

Use these helpful Picture to our Bearing Bar Size Selection Guide as necessary.  Count on Shengxiang Company for  fast / accurate order processing, fair pricing and on-time delivery.  We want you back the next time.

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