Type “SG” Swage Locked Aluminum Grating
The most widely used aluminum grating, type SG rectangular bar, provides crisp lines. Bearing bars are available with standard plain or optional serrated or OnGrip surfaces. The cross bars are 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, 19-SG-4 is virtually self-cleaning, allowing for easy passage of dirt, debris, snow, and liquids.
Type SG gratings are available in close mesh ADA conforming spacings 11-SG-4 and 7-SG-4, which are commonly used for public areas.
Type “SGI” Swage Locked I-Bar Aluminum Grating
Type “SL” steel gratings are manufactured by inserting hollow tube cross bars into pre-punched holes in the bearing bars. The cross bars are then swaged 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 ADA conforming 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 high heeled shoes converge.
Type “SGF” Swaged Flush-Top Aluminum Grating
Manufactured with a unique, extruded cross bar that is flush with the top surface of the bearing bars, 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.
Type “ADT” Aluminum Dovetail Pressure Locked Grating
Type ADT aluminum gratings have deep rectangular cross bars and are manufactured by inserting pre-punched bearing bars and cross bars into an “egg-crate” configuration and deforming the cross bars under intense hydraulic pressure.
The deep cross bars on type ADT gratings make them popular for architectural applications such as sun shades and infill panels with the deeper cross bar serving as a distinct visual accent.
