Bar Grating
Heavy-weld Bar Grating
This heavy-weld grating can withstand almost anything you can throw
at it. Standard and special types of heavy weld grating are capable
of handling cars, trucks, lift trucks, and more. Be sure to specify
the type of grating you need.
Standard Heavy-weld Grating
Designed with rectangular cross bars to give
best possible surface for cars, trucks and lift trucks..
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Special Heavy-weld Grating
Designed with round cross bars located below
top surface of grating to make it impossible for cross bar to pull
out even under high impact situations. |
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Trench Covers showing Heavy-Duty Grating with
supplementary lower cross bars and end bending bars.
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A
= Panel Width. The dimension perpendicular to the Main Bars taken from
the outside face of the first Main Bar to the outside face of the last
Main Bar. Standard widths are derived from multiples of a standard center
to center spacing of Main Bars (G) plus the thickness of one Main Bar
(D). Maximum standard width in accordance with tables.
B = Panel Length. The dimension parallel to the span direction of the
Main Bars including the thickness of the End-Banding (M) where applicable.
This dimension can be satisfied without restriction as to standard length
increments.
C = Main Bar Depth. Standard Main Bar depths available are 1-12", 1-3/4",
2", 2-1/4", 2-1/2", 3", 3-1/2", 4", 4-1/2", 5", 5-1/2", 6" and 7".
D = Main Bar Thickness. Standard Main Bar thicknesses are 1/4", 5/16",
1/2".
E = Clear Opening. The face to face dimension between Main Bars.
F = Open End. When the end of the panel is not closed by End-Banding.
G = Center to Center of Main Bars. Dimension varies with grating type.
H = Cross Bars. Standard cross bars are rectangular and in the special
design, round.
J = Center to Center of Cross Bars. The standard dimension is 4".
K = Clear Span. The dimension toe to toe of supporting beam flanges
or face to face opening between bearing surfaces.
L = Effective Span. This is the dimension used in design and referred
to when specific grating Type and Main Bar size are recommended to sustain
a given load on a particular Span. Center to center of support beams
equals Effective Span plus 1/2 of one supporting flange width. Permissible
Clear Span equals Effective Span minus 1/2 of one supporting flange
width.
M = End-Banding. A flat bar welded to the ends of the Main Bars and
furnished only when specified. End-Banding is recommended on any grating
carrying vehicular loads but is mandatory only on grating panels carrying
vehicular loads on short spans.
N = Grating Support Members. Provide others.
O = Main Bars. Load carrying members of the grating which govern the
direction of panel strength and stiffness.
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