The most common width and length are as following:
However we also do other sheet size according to customers’erquirements.Margins are the blank (un-perforated)area along the edges of the sheet. Normally the margin on the length are 20mm minimum, and margin along the width can be 0 minimum or at customers’requests.Other hole patterns and hole arrangement can be custom made.Round hole are normally arranged in 3 types:Other hole patterns and hole arrangement can be custom made.Perforated metal sheet can do cutting and folding after perforated.Perforated metal sheet can do the following finish according to customers’ requirements. Natural Finish Most if the perforated sheet are required to be natural finish no matter what kind of material they are. Oil Spraying Some customers prefer the carbon steel perforated sheets to be oil sprayed to avoid the possible rusting because of the moisture during the long time sea shipping. Powder Coating Perforated metal sheet can do different colors powder coating,but minimum quantity might be required for some special colors.Open area is the ratio between the total area of the holes and total sheet area,normally it is expressed by percent,for example for a perforated sheet with the following specifications: Round hole 2mm hole size,60 degree staggered,4mm pitch,sheet size 1mX2m. According to the above information and based on the formula.we can get the open area of this sheet is app 23%,it means the total holes area of this sheet is 0.46SQM.Thickness of the metal sheet do not change during the perforation. Normally thickness is expressed in gauge. However, to avoid possible Thickness misunderstanding, we would suggest to express them in inches or millimeters.