Used Determining what metal and finish to use mainly depends on the environment the tray will be used in. After the tray is made it is dipped into a molten zinc bath so that all surfaces are thoroughly coated. This provides excellent protection from the elements at an economical cost. Gives excellent service in dry or controlled atmospheres. Inherently corrosion resistant.
All alloys are copper-free.
Inherently corrosion resistant. Can be used indoors and outdoors. Rung spacing If one is using a ladder tray, the rung spacing should correspond to the nature of the cables to be installed in the tray. Small control cables generally call for 150mm rung spacing to prevent cable sag. Very large diameter cable such as interlocked armored cable can use 450mm rung spacing.