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This guide will assist you determine the exact type of material that you may require. SHEET AND PLATE SIZE / THICKNESS Size: Standard Stock Size Sheets and Plates: 36" x 96", 48" x 96", 48" x 120". The width and lenght will be standard mill shearing plus any stretch of the material by perforating unless otherwise specified. For carbon steel sheets or plates, tolerances as set by the American Iron and Steel Institute. Thickness: Steel: Use decimal fraction or Manufacturers' Standard Gauge. Stainless Steel: Use decimal fraction or U.S. Standard Gauge. Aluminum: Use decimal fraction or Brown and Sharpe Gauge. Top PERFORATIONS Round Perforations: Staggered (60 degrees pattern) is standard. Variations include 45 degrees and straight line pattern. 
Square Perforations: Staggered or straight line pattern. 
Slotted Perforations: Side staggered, end staggered or straight lines. Standard slotted perforations will be round end slots. Specify if square end slots are required. 
Top PATTERN OF PERFORATIONS Staggered perforations, both round and square - direction of the stagger will normally be the short dimension of the sheet, as illustrated below; 
Top END PATTERNS The figures below illustrate two types of end patterns. Most of our perforated materials will be supplied with the Open End Pattern which is our standard. Certain designs can be supplied with the closed end pattern. 
Top MARGINS If margins are not specified we will supply material with minimum or no margins. Perforated material with special margins to your requirements can be supplied. The margins for each of the four sides of the sheet should be specified. If close tolerances on the margins are necessary this must be clearly shown. Top SPACING OF PERFORATIONS Spacing for large perforations will be designated by either Centres of Perforations, or by the Open Area required. Spacing for small perforations will be designated by either Centres, or Open Area, or if more practical, by the Number of Perforations to the square inch. Top FLATNESS OF SHEETS AND PLATES All standard sheets can be supplied commercially flat. However, if your job should fall under one of the following categories, it is recommended that you discuss the flatness requirements before proceeding; Top [Aluminum] [Cold Rolled] [Galvanized] [Stainless] [Specifications] [Sample Perforations] [Applications] [Expanded Metal] [Specifications] [Applications] [Wire Cloth] [Wire Screen] [Wire Mesh Stock List] [Wire Mesh Specifications] [Bar Grating] |
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