Patterns A & B
A & B patterns conform to the AS 1657 Code for Fixed Platforms, Walkways, Stairway and Ladders.
These patterns are the most commonly specified and installed. This type of grating with its 30mm load bar centres has the greatest resistance to surface impact.
In serrated form, patterns A & B are used in wet, greasy areas.
NB: Serrations are not as effective in the B pattern because of the pitch of the cross rods.