Product Overview
Grating Pacific trench and inlet systems combine our most popular gratings and embed frames in a complete set for economic, simple installation on construction projects. Systems are available in standard duty for pedestrian loads and heavy duty for demanding vehicular traffic.
- Multiple bar spacings to address specific applications
- Various frame profiles to match edge conditions
- Standard plain surface, galvanized finish
Options are available for slip-resistant surfaces or bolted grates.
Types of Trench & Inlet Systems
Standard Duty
Type “S”
Designed to support pedestrian loads, type “S” grates are manufactured from welding grating with durable 3/16″ (min.) thick bearing bars. Open area of nearly 80% allows for fast clearing of moisture and run off.
Type “SA”
Standard duty type “SA” grates are designed to conform with strict ADA spacing requirements. Open area of 68% allows for drainage and ventilation while maintaining a safe traffic surface.
Type “SP”
Type “SP” grates comply with ADA spacing requirements. Additionally, the 1/4″ maximum clear opening between the bearing bars makes these grates desirable in areas subject to pedestrian traffic where high heeled shoes are common.
Heavy Duty
Type “H”
Type “H” grates are manufactured from stout 3/8″ (min.) thick bearing bars and designed to serve truck and forklift loads. With nearly 70% open area, these products are ideal for parking lot and highway drain applications.
Type “HA”
Heavy Duty type “HA” grates are ADA conforming, similar to type “SA” above. These grates are additionally designed to support forklift and vehicular loads.
Type “HP”
Heavy Duty type “HP” grates are similar to type “SP” above, with the exception that these grates are additionally designed to support forklift and vehicular loads.
Bolting Options
Trench and inlet systems are manufactured as component products with grates easily removed for clearing debris. Often, security concerns or traffic conditions dictate that the grates must be bolted to the framing. When this option is specified, weld lugs or countersunk lands are installed on the grates and the bolt is installed below the traffic surface of the grating. For high security applications, tamper-resistant fasteners are available.
Bolted Grates with Weld Lugs
Tamper-Resistant Bolt with Weld Lug
Close Mesh Bolting with Countersunk Land
Trench Grating Systems
Grating Pacific allows the specifier to combine any of our Standard Duty pedestrian grates or Heavy Duty vehicular gratings with any of our popular Embed Frames. Unlike cast iron or molded trench products, this flexible system allows the user to specify the exact clear opening (“S” dimension) desired.
Because Grating Pacific offers five distinct embed frame profiles, the user can select a frame to meet the exact edge condition desired. Bolting the grates to the frames is optional and must be specified.
All gratings are provided with plain surface (the optional serrated surface is available when specified) and open ends are trench banded to maximize drain capacity.
Unless otherwise specified, all trench frames and grating are hot dip galvanized after fabrication in accordance with ASTM Specification A123. Our most popular systems are listed in the table below.
How to Specify Trench Grating Systems
Inlet Grates & Frames
Grating Pacific inlet grates and frames provide the specifier with flexible solutions to inlet drain requirements. Standard Duty pedestrian grates and Heavy Duty vehicular grates may be specified to any clear opening by simply indicating the desired “W” (width) and “S” (span) dimensions. Any of our five Embed Frame profiles may be specified to meet the exact needs of your application. Bolting the grates to the frames is optional and must be specified.
While all gratings are manufactured with plain walking surface, the optional serrated surface may be specified. The open ends of all inlet gratings are trench banded to enhance durability and allow for maximum drainage.
Unless otherwise specified, all inlet grates and frames are hot dip galvanized in accordance with ASTM specification A123.
How to Specify Inlet Grates & Frames
Standard Inlet Sets
Standard inlet sets listed below consist of our “E-Z Pour” frames with either of two popular series of grating. Standard Duty type “S” grates are selected for pedestrian applications and type “H” Heavy Duty grates are selected for vehicular load applications.
