Things To Know When Talking About Steel Gratings

Things To Know When Talking About Steel Gratings

Many of us know what gratings are, and what their applications are in homes and various industrial settings. However, the majority of the people do not know much about gratings or are not that well versed in the right terminology in defining, differentiating or identifying variations in gratings and its several types. This post is to help you know more about gratings, terms used in specifying or identifying its various types and specifications, and other terms that might prove helpful at some point in time.

Gratings, in general, can be defined as a framework or a grid of crossed or parallel bars, normally preventing access through an opening, while permitting communication and ventilation. This definition of gratings or grates is broad, not restricting its applications by definition. “Entry prevention” entails its applications as a structural surface, such as a wall, floor, fencing, pathway, roof, and such. Specific to gratings, these structural surfaces are nothing but a well-engineered framework, with variations in design that provide effective ventilation between compartments, with no compromise in functionality or structural capability. Although Gratings are manufactured with numerous variations, at Oasis Metal Manufacturing LLC we produce standard and shaped steel gratings, stair treads, and fixing clips.

Terms Associated with Steel Gratings

Some common terms or terminology used in reference to the specifications, types and other variations of steel gratings are:


A steel grid formed using load-bearing bars and crossed bars through resistance welding.

Span (Length of the Grating)

The span or length of the grating is measured along the direction of the load-bearing bars. Variations in the span of the gratings usually cause a difference in its load-bearing capacity.

Width of the grating

The width of the grating is the measure of distance along the direction of the cross-bars.

Plain load-bearing bar

Plain load-bearing bars are normal flat load-bearing bars, which are used to produce plain or flat surface steel gratings.

standard steel gratings

Serrated load-bearing bar

Serrated load bearing bars are flat on one side and serrated or ridged on the other. The seated edge provides the surface of serrated steel gratings, which are commonly used for their anti-slip properties as industrial flooring.

serrated steel gratings


The pitch is the center-to-center distance between two load-bearing bars or two cross bars.

Binding bar

Binding bars are flat bars used to construct a border for the framework. These flat bars are welded to shaped panels at each end and at cut-outs to form panels or tiles.

Grating Gross Area

The Gross Area of a Grating is the total area of the grating including the cut out areas. The gross area is not the net or actual area of the grating as areas that are cut out or removed are also calculated.

Grating Net Area

The Net area of a Grating is the actual area of the grating. It refers to the total or gross area, excluding (minus) the area cut out.


Any area of a grating that is required to be shaped and removed or cut out to allow pipes and columns to pass through is called a cut-out. A Cut-out can with be Straight Shaped- cut-out with straight edges or straight lines, or Curved Shaped – cut-out with curved lines or edges.

Toe Plate

Toe plates are large-sized flat bars which are welded to the edge of the steel gratings or grating panels, for safety and precautionary purposes.

Curb Angles

Curb angles are support fixtures that are installed onto concrete or a steel frame to support grating panels.

Erection Clearance

Erection Clearance is a permitted distance from a grating panel to an adjacent panel or structure.

Stair Tread

Stair Treads are steel gratings or panels with end plates and non-slip nosing, which are used in stairways. End plates are plates that are welded to each end of a stair tread, allowing easy installation to steelwork or a steel frame. Non-slip nosing is a special anti-slip bar, that is welded to grating panels or stair treads to provide a grippy surface and prevent slipping.

steel gratings stair treads

With knowledge of these basic terms, you can easily understand variations in the different types of steel gratings, custom panel designs and cut-outs, and differences in weight-bearing capacities of gratings. This can further help you choose the right type of steel gratings, which are ideal for the types of application and use. For ideas on creative and innovative uses of steel grating, like indoor home decor with steel gratings, check out the rest of the blog.

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