Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. leo5cn

    Allowable pole tip deflection for single Pole Wood Structures

    Here we use 0.5 for western red cedar, 2800psi
  2. leo5cn

    Pole foundation without concrete

    corrosion is more than anything else. you need to make the pole footing a cathode. Also soil horizontal spring contant to control ground line deflection.
  3. leo5cn

    Loads on foundations - TOWER

    can't you get the footing reactions by hand calculation ?
  4. leo5cn

    Allowable pole tip deflection for single Pole Wood Structures

    @Transmissiontowers, say a standard pair of tension compression diagnals,in plane effective length factor 0.5, rz also 0.5, what is the factor you use for out of plane buckling unbraced length ? 0.7 ?
  5. leo5cn

    Allowable pole tip deflection for single Pole Wood Structures

    wood pole is not a manufactured product, the COV is about 20% for MOR under bending.this 10% is a very rough estimate and rather deterministic, it really depends on the pole species and the MOR you use.
  6. leo5cn

    Allowable pole tip deflection for single Pole Wood Structures

    Wood pole would rupture at 10% deflection, so it's a stress limit.
  7. leo5cn

    Drawing Parabolic curve in Autocad

    Or you could make an auto lisp macro.
  8. leo5cn

    Hot bending plates

    If the plate is less than 1/2" thick and the bending angle is no more than 15 deg, cold bending should suffice, but you need a subsequent heat treatment for stress-relief.
  9. leo5cn

    Vintage tower modelling

    So assume you want to check the capacity of an exisiting tower for whatever reason. You go out to the field and you find out these steel angles in dark brown color. You could certainly grind the surface to near white and use a caliper to measure thickness as long as this portion of the tower is...
  10. leo5cn

    Vintage tower modelling

    Transmission towers, can you shed lights?
  11. leo5cn

    Vintage tower modelling

    Can someone share tips on how to model an vintage tower in PLS TOWER, especially member thickness as a result of the loss of material due to corrosion ...
  12. leo5cn

    ASCE manual for Wood Pole

    ASCE 111
  13. leo5cn

    ASCE manual for Wood Pole

    Wondering if there's a ASCE manual for wood pole design, something like ASCE 10 for lattice towers ...
  14. leo5cn

    A394 & A325

    We use #18 quiet often. We only weld angle stub to base plate as the shoe footing.
  15. leo5cn

    A394 & A325

    Do you require impact property for welded steel, anchor bolt and hardware? What's their charpy test value?
  16. leo5cn

    A394 & A325

    What's the criteria of your emergency? For example, the peak load of 100 hours in ten years?
  17. leo5cn

    Metal Roof Deck

    The inch and half roof deck probably is 18 Gage. That's the most extensively used type. The load table should be easily available from manufacture. Vertical load is taken by joist spacing, shear and uplift by fasteners.
  18. leo5cn

    A394 & A325

    I never knew that bolt could be installed without a locking device (washer) until I read your post. What if some lunatics or punk kids steal the bolt for fun? If the clamping force is too low. They would be able to remove the bolt with regular wrench ... Just some thoughts ...
  19. leo5cn

    A394 & A325

    I think the larger bolt head makes sense in that it enhances the local bearing. It's true tower bolts are predominantly under shear, but we use pretty tight clamping force. We use lock washer (helical spring) to secure the bolt and nut. The torque is 90 for 5/8 and 120 for 3/4
  20. leo5cn

    A394 & A325

    I take off my hat to you, 'Transmissiontowers'. This answer for sure is NOT from 'A storehouse of worthless information'. Because I am so used to A394 Type 1, I never bothered to compare the geometrical details until recently I had a situation where the A325 was being used when the connection...

Part and Inventory Search

Back
Top