Perforations
ROUND PERFORATIONS (click here to view product details)Staggered (60 degree pattern) is standard. Variations include the 45 degree staggered, and Straight Line Pattern.
SQUARE PERFORATIONS (click here to view product details) Staggered Pattern or Straight Line Pattern.
SLOTTED PERFORATIONS (click here to view product details) Side Staggered, End Staggered, or Straight Lines. Slotted Perforations will be round end slots; specify if square end slots are required.
CUSTOM PERFORATIONS (click here to view product details)
Round Holes
Square Holes
Slotted Holes
Slotted Perforations Slots can be furnished parallel with either the length or width of the sheet in most cases.
Custom Perforations
End Patterns
Unfinished End Pattern As a result of tool design, some specifications of staggered pattern perforations yield a pattern that appears incomplete at both ends of the sheet. This is an industry standard.
Finished End Pattern As a result of tool design, some specifications of staggered pattern perforations yield a completed pattern on both ends of the plate.
Margins
Minimum Margins
Perforated stock size sheets and plates.
The long side of a sheet will be supplied with minimum margins. The short side of a sheet will have either minimum margins or no margins.
Sheets and plates resheared after perforating.
Special margins are available, but they must carry a tolerance within the limits of the perforating tool.
Unfinished end pattern is standard in the industry.
Types of Perforations
Spacing of Perforations
Spacing for large perforations will be designated by either Centers of Perforations, or by the Open area required. Spacing for small perforations will be designated by either Centers, or Open area, or if more practical, by the Number of Perforations to the Square Inch.
Pattern of Perforations
Staggered Perforations, both Round and Square The pattern stagger is normally in the short dimension of the sheet. Holes in a straight row pattern are normally parallel to long dimension of sheet.