Portable Power Tools

Chapter 296-807, WAC

Effective Date: 08/01/03

Helpful Tools

Helpful Tool: Center Punch Test

Do a center punch test with a hammer to determine the suitability of the base material for a powder actuated fastening. This test is relatively simple and can help you do a safe, successful fastening. Be sure to wear the appropriate eye protection when performing this test.

The test is done as follows:

(1) Select the fastener to be used for the job.

(2) Place the point of the fastener against the base material.

(3) Strike the fastener with a single hammer blow, then examine the point. If the point of the fastener isn't blunted and the base material has a clear point indentation, you can do the first test installation.

Use of a powder actuated fastening system isn't recommended if the following occurs during the center punch test:

  • The fastener point has been blunted. This indicates that the base material is too hard.

  • The base material cracks or shatters. This indicates that the base material is too brittle.

  • When using an average hammer blow, the fastener penetrates the base material easily. This indicates that the base material is too soft.



End of main content, page footer follows.

Access Washington official state portal

© Washington State Dept. of Labor & Industries. Use of this site is subject to the laws of the state of Washington.