U.S. FOUNDRY & MANUFACTURING CORPORATION
GENERAL INFORMATION
GENERAL INFORMATION
CONT.
5
SECURITY AND SPECIAL BOLTING APPLICATIONS:
Theft, vandalism, safety and restricted access to grates and covers can be a concern. These conditions
are addressed in many different ways. U.S. Foundry offers security bolting such as; Penta-head,
Buttonhead Tamperproof bolts or drill and tap service for customer supplied specialty bolts. Also available,
are fixed and adjustable camlocks, and Penta-headed wedgelocks. Thease options are described in
detail on page M-2.
All of these options can be utilized on most U.S. Foundry covers frames and grates. Contact your sales
or customer service representative for more information.
CONFINED SPACE / CLEAR OPENINGS:
Master manholes, Air Release and other structures that have mechanical equipment or require more
frequent access often need larger clear openings to address safety, working or equipment needs. These
are addressed in our “Large Manhole” sections on pages M-56 and M-73. These rings offer a large outer
cover, coupled with a smaller inspection cover.
ADJUSTING RINGS:
Adjusting Rings are available for most ring and cover combinations. U.S. Foundry stocks cast iron and
steel Adjusting Rings in specific increments for some castings. We also have the ability to manufacture
steel Adjusting Rings to size and height required for all other U.S. Foundry and/or any other manufacturer’s
ring and cover with a nominal amount of customer-supplied information. Summary of stock Adjusting
Rings and ordering information on all others is shown on pages M-5 thru M-6.
Adjusting rings can also be ordered for square, rectangular or other special applications upon request.
STORMWATER DRAINAGE
FLOW AREA FOR GRATES:
The net open area of each grate is listed, so that a general comparison of flow rates can be made.
These open areas are figured for the entire grate. When determining actual flow areas, this should be
reduced by the area of the seat. The net open area is calculated in square inches.
RESTRICTED GRATE OPENINGS:
When you design your project and you select a grate design, it is often necessary to consider slot size.
We have identified the USF grates with relatively small slot lengths as “Restricted Grate Openings”. This
term is applied when the slot lengths are 6 1/2 inches or less. The 6 1/2 inch dimension is an arbitrary
length and does not imply the recommendation of a grate for any particular application.
ADA (AMERICANS WITH DISABILITIES ACT) APPLICATIONS:
When you design your project, you should be attentive of how the Americans with Disabilities Act (ADA)
affects the placement of products. The application, as it relates to grating, states that grates in walking
surfaces have slot openings 1/2 inch or less in one direction. Grates with elongated opening will be
placed with long dimension perpendicular to the dominant direction of travel.
U.S. Foundry offers many options to accommodate your ADA requirements including Trench and Inlet
Grating, Catch Basins and Curb Inlets that are ADA compliant when installed properly. These products
are found in our “Trench Grate” section, page CI-17 thru CI-20 and throughout the “Catch Basin”, “Curb
and Gutter” and “Cast Iron Grating” sections. However, we do suggest reviewing ADA specifications
before specifying a particular item. Contact us to see how we can meet your needs.