Where are diamond and teardrop patterned stainless sheets used: stairs, platforms, trailer floors. What does the anti-slip effect provide, and how is it cleaned?
Patterned sheet is plate with a raised pattern pressed into its surface during rolling. There are two common patterns: diamond (intersecting double lines, a diamond look) and teardrop or almond (single-direction rows of drops).
The purpose of the raised pattern is to reduce slipping by increasing friction between the sole of the foot or a tire and the surface.
The diamond pattern is symmetrical and gives grip independent of direction; because of its decorative look it is also preferred in architectural applications.
The teardrop pattern is directional; grip is higher in the direction perpendicular to the drops, so on ramps and sloped surfaces it is laid perpendicular to the walking direction.
Typical applications: industrial platforms and landings, stair treads and landings, pedestrian bridges, trailer and body floors, vehicle steps, walkways around machinery, kitchens and facility areas with wet floors.
The stainless version lasts longer than galvanized or aluminum equivalents in food, chemical and outdoor applications exposed to moisture, washdown and outdoor weather.
The raised pattern markedly increases surface grip in dry and lightly wet conditions. However, under ice, a thick oil film or loose dust it may not be sufficient on its own.
The anti-slip effect decreases as the pattern height wears down; in heavy-traffic areas periodic inspection is needed.
The pattern recesses collect dirt and residue, so it is not as easy to wipe clean as flat sheet. Pressurized water, a soft brush and chloride-free detergent are suitable.
Chlorine-based (hypochlorite) cleaners and steel wire brushes are not recommended; the first stresses the passive layer, and the second can leave embedded iron particles on the surface, leading to superficial rusting.
Patterned sheet is generally installed with the flat face down and the patterned face toward the user. Since the edges are sharp, they are finished with a profile or by folding.
On large spans a supporting framework underneath is needed to prevent deflection; sheet thickness alone does not carry the span.
The diamond pattern is symmetrical and independent of direction. The teardrop pattern is directional and gives higher grip in the direction perpendicular to the drops, so orientation matters on sloped surfaces.
It markedly increases surface grip in dry and lightly wet conditions. Under ice or a thick oil film it may not be sufficient on its own, and its effect decreases as the pattern wears.
Indoors and in chloride-free environments 304 is common. In chloride environments such as coastal sites, around swimming pools or chemical plants, 316 is safer.
It is cleaned with chloride-free detergent, a soft brush and plenty of water. Steel wire brushes and chlorine-based cleaners are avoided.
