Perforation Patterns

Printable Version (PDF)

 

      The patterns shown (below) represent the most commonly used patterns. The formulas for determining the percent open area (% O.A.) and holes per square inch (H.P.S.I.) are also listed below. Please contact us with your specific requirements.

Round Holes

 

60 Degree Staggered Centers

60 Degree Staggered Centers are the most popular of all pattern types because of their inherent strength, their multitude of varied open areas, and their attractive appearance.

60 Degree Staggered Centers

45 Degree Staggered Center patterns are an option for those looking for something different.

60 Degree Staggered Centers

Straight Center Round Hole patterns are available in multitude of sizes and open areas. They are however, the weakest of the round hole patterns.


Where D= Hole Diameter

 

 

 

Disclaimer: Johnson Tube Company™, a division of Johnson International Industries, Inc., has gathered the information contained in this website from many different sources. To the best of our knowledge, all information is correct and accurate at the time of publication, but is intended to supply general information only. The information presented here is given as a guide, for reference purposes only and should not be used as technical/design specifications. The reader must make their own evaluation, based on their own research and more specific information than that supplied here, by Johnson Tube Company™, all information must be verified by the reader. Johnson Tube Company™, a division of Johnson International Industries, Inc., are processors and re-sellers of these materials and makes no guarantees or warranties, either expressed or implied, regarding the accuracy of the information supplied or the suitability of any material for any application. Information and specifications are subject to change without notice.

 

Not all products are produced by Johnson Tube Company™, a division of Johnson International Industries, Inc., but all products meet or exceed stated specifications.