Gratings are a little-appreciated part of every day life, from covering holes in the sidewalk to protecting valuable parts of your computer. Gratings are made out of a variety of materials, from steel to plastic, and consist of a series of struts enclosed by a frame. The type of strut used varies, depending on the use of the grating. Struts have a variety of features, including strength, flexibility and slip resistance.
Grip struts are most often made out of stainless steel or expanded brass or aluminum. They require little maintenance, and are used in the industrial, construction and municipal engineering fields because of their durability, resistance to corrosion and ability to support heavy overhead loads. They can be used as wells and drain covers, and as safety grating, due to their slip-resistant nature. Grip struts can be purchased in both standard and heavy-duty form.
Steel struts, also known as bearing bars, are normally in-built in standardized gratings. Based on your need, you can select your strut thickness and the distance between the struts. The minimum strut thickness is 22 millimeters but 30, 40 and 50 millimeter struts are also available. The strut gap distance is important; if your grating will be used for drains on a sidewalk, the spacing must be such a child's foot will not fit through it. Steel struts and gratings are used for drain covers, plug grill plates, pool covers and staircase boards.
Wire struts are typically made out 1.5- to 6-millimeter strips of perforated metal. The struts are positioned very close together in a crisscross fashion, and then welded or wound together to form a mesh. This can be in a square, diamond or cross stitch fashion. As the wire is flexible and breaks easily, mesh gratings are small, and, unlike steel and grip struts, are not used in areas where there is human footfall. Instead they are used to cover open areas of machinery, such as the fan ventilation system of computers.