Services from A-Z: Helling & Neuhaus Gratings - technical teerms made easy.

Bearing bars

bear the weight. Cross bars are pressed and/or welded onto the bearing bars. They absorb a proportion of the weight distribution and provide stability. The binding bar encloses the mesh pattern

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Mesh width

is the distance between the bars, Mesh spacing is the distance from the middle of one bar to the middle of another bar.

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Anti-slip

gratings have special serrations notched on the upper surface of the bearing and/or cross bars.

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Safety edging:

for anti-slip and increased load carrying capacity, specially formed angle profiles (safety edges) are welded onto the stairtreads.

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Plates:

stairtreads consist of gratings with welded on safety edges and punched plates.

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The clear span

is the measurement from the middle of one support to the middle of another in the direction of the bearing bars. The span specifies the measurement between two supports.

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Grating support plate:

The length of the support plate in the design should be at least 30 mm; in working conditions it should be at least 25 mm. Deviations are acceptable as long as a grating is prevented from moving.

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The substructure

is the component on which the grating is laid.

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Concrete ledge:

In order to create a flush connection between the upper grating surface and level of the floor, a concrete ledge is produced or the grating is notched.

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