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Product
Expanded Metal:

Characteristic:

Perforated Metal

Characteristic:

Bar Grating

Characteristic:

 
Bar Grating Technical:
 
 
Request a quote from the stock list. If an item is not in stock, use the quote form. The following details explain the specifications required to request a quote.
Material Selection:
· Plain Steel
· Galvanized
· Stainless Steel
· Painted Black
· Aluminum
· Powder Coated
 
Note: For stainless steel, the standard mill finish will be gray and will have a discoloration of various colors (blue, black, brown, etc.) as a result of the heat generated in the welding process in manufacturing of the grating. Sandblasting is available to improve the appearance.
Center to Center Bearing Bar Spacing:
 

Center to center bearing bar spacing is the of distance from the center of one bearing bar to the center of the next bearing bar. See the spacing table for more information on the GW and SGW Series bearing bar spacing.
Center to Center Cross Bar Spacing:

Center to center cross bar spacing is the distance from the center of one cross bar to the center of next cross bar. See the spacing table for more information on the GW and SGW Series cross bar spacing
Construction:
Welded bar grating is constructed by weldforging where the cross bar is welded into the bearing bar so that the cross bar is flush with the bearing bar.

The bearing bars run parallel to the length or span of a standard grating panel and are responsible for the product's load bearing capabilities. The cross bars, which run parallel to the width of the span, are primarily responsible for holding the bearing bars together. However, they also play a factor in deflection characteristics, especially for concentrated loads which are not distributed across the span of the grating.
Surface:

Welded bar grating is available with the following surfaces:

· Smooth - Standard surface.
· Serrated - Serrations are cut into the grating’s bearing bars surface
· Mebac - Grit is bonded to the grating surface.

Mebac surfaces provide slip resistance and are available by special order.
Banding:
Bar grating panels, pieces, or trench grating can be banded to provide strength and to provide a finished look. Banding is the welding of a rectangular metal bar to the ends of the bearing bars. Two banding types are available, based on the placement of the welds.

· Load Banding - The metal bar is welded at every bearing bar. Load banding is commonly used in trench grating applications where high loading requirements exist (i.e. motorized wheel traffic). Note: Aluminum products are not load banded.

· Trim Banding - The metal bar is welded only at every 4th to 6th bearing bar. Trim banding is commonly used for pedestrian traffic applications where loading is not a factor.
Bearing Bar Height:

The bearing bar height, also known as bearing bar depth, is measured from the bottom of the bearing bar to the top. See the appropriate GW or SGW Series load table for the available bearing bar heights.
Bearing Bar Thickness:

Clear span is the length of unsupported grating. Grating supports typically have a foot or ledge on which the grating rests. The part of the grating resting on the support is not part of the clear span. For example, if a 36-inch long piece of grating rests on two supports, each with a 3-inch ledge, the clear span would be 36 inches minus the part of the grating resting on the ledge (which is a total of 6 inches). In this example, the clear span would be 30 inches.
Span:

The span of the grating is the length of the grating between grating supports. In order to perform in accordance with its design loading characteristics, grating must be installed so that the bearing bars are parallel to the span. This is necessary because bearing bars are the primary elements which support the load applied to the grating.
Clear Span:

Clear span is the length of unsupported grating. Grating supports typically have a foot or ledge on which the grating rests. The part of the grating resting on the support is not part of the clear span. For example, if a 36-inch long piece of grating rests on two supports, each with a 3-inch ledge, the clear span would be 36 inches minus the part of the grating resting on the ledge (which is a total of 6 inches). In this example, the clear span would be 30 inches.
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Add: East Weimin Street, Anping, Hebei Province P. R.China
Tel: 0086-318-5285591 0086-318-5285861
Fax: 0086-318-5285862
http://www.filter-wiremesh.com
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Expanded business contacts-mail:sales@china-expanded.com
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