Micrometer
Micrometer
(OP)
Has anyone found or use a micrometer that is large enough to reach around a 6 or 8 inch wide flange to measure web thickness?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
Download nowINTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: Micrometer
Maine EIT, Civil/Structural.
RE: Micrometer
Determining the original section isn't usually a problem, as you suggested. But, when the web is chewed up, it is nice to be able to map out the section loss.
RE: Micrometer
For section loss I've typically just found a rough, average loss of thickness (admittedly with the thickness gauge but you could get a rough idea from the flanges) and use that to find the typical section properties assuming a uniform loss of thickness on the corroded surfaces. Any errors or thicknesses below the assumed, average thickness will likely be reinforced by areas which are above the average thickness.
Alternatively, this is a great time to justify the purchase of a thickness tester.
Maine EIT, Civil/Structural.
RE: Micrometer
Transfer calipers
Transfer calipers are used for measuring chamfered grooves or flanges. A screw attaches a small auxiliary leaf to one of the caliper legs. The measurement is made as with ordinary calipers. The leaf is locked to the leg. The legs may be opened or closed as needed to clear the obstruction. The legs are then brought back and locked to the leaf, restoring them to the original setting.
RE: Micrometer
RE: Micrometer
RE: Micrometer
http://www.mcmaster.com/#outside-micrometers/=uk07...
This is an awfully expensive way to say, "Yup, it's rusty". The ultrasonic doohickeys would be more all-around useful, I would think.
Labs that do steel inspection should have the ultrasonic testers and people that know how to use them.
RE: Micrometer
RE: Micrometer
Maine EIT, Civil/Structural.
RE: Micrometer
I have noticed some much-less-expensive (sub $200) models on Amazon lately. Not sure of your certification/documentation requirements however, which I believe these less expensive models lack.
For example: Link
I do not vouch for this unit - just an example.
RE: Micrometer
RE: Micrometer
RE: Micrometer