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  1. craigclick

    Force req'd for connection to fail

    Thanks for the input. I'll clarify: 1. I thought the nomenclature PTR was universal, but I guess it only applies to Mexico. In this case, it is square tube, A36 steel, with a wall of 1/8". In this size, 2"x2". A thicker wall is not available. 2. The FLD HD screws, 28 TPI, are to keep a clean...
  2. craigclick

    Force req'd for connection to fail

    Hi - I'm a woodworker, and not an engineer, and would be much obliged if someone could tell me how may lbs/lg would it take for this connection to fail. The force is static. Thanks.
  3. craigclick

    Elastic modulus on round bar

    I agree; it needs a base, and the square tube could help with support. The thinking is that the rod is threaded on the ends, one end into a steel base, and at the top a nut. We just did a small mockup with 16 pieces of wood and four 1/4" steel rod. Four high with a hidden joint that kept them at...
  4. craigclick

    Elastic modulus on round bar

    We’ve been asked to provide a mock-up and quote for a retail display. My intuition tells me that while interesting, it’s not practical. Putting aside the fact that while it could not be free-standing, and even a solid base may not be enough without some type of upper plate, my concern is what...
  5. craigclick

    Converting pressure to torque

    I cannot tell whether the photo I thought I had attached in my reply above was actually attached, so I'll try again. We built this press to laminate non-structural members that go into the fabrication of doors and windows. It is a work-in-progress. We wanted some consistency in our applying...
  6. craigclick

    Converting pressure to torque

    Thanks all for taking the time to respond. While we are laminating only 1" boards for non-structural purposes, we wanted an idea of the clamping pressure involved and the only info available was for structural glu-lam. The 325 ft-lb number was mis-understanding my associate; the number was what...
  7. craigclick

    Converting pressure to torque

    Exactly Dik, applying torque to a clamp, as in the attached photo. To get it right we want to use a torque wrench.https://files.engineering.com/getfile.aspx?folder=f47fcfcd-888f-4865-b641-32f02dc1c5b2&file=IMG_1588.JPG
  8. craigclick

    Converting pressure to torque

    In the manufacture of laminated timber structures the pressure should be 0.6-1.0 N/mm². In attempting to convert to 'foot pounds', I'm just all over the place with ridiculously high figures (325 ft pd) to incredibly low (4.7). The latter coming from 1 N/mm2 = 1 MPa. Can anyone shed some light...

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