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  1. tnteng

    Tear out of parent material at base of padeye

    Thanks Tmoose, I have a pic of what the loading and padeye orientation looks like. How can the pic be attached to my reply to this post? Tony Billeaud Mechanical Engineer
  2. tnteng

    Tear out of parent material at base of padeye

    I've got a padeye welded to square tubing that has a 1/4" wall. Load on padeye is parallel to the axis of the tubing. I am trying to find out if there is a standard way to check the stresses in the tubing if the load on the padeye puts a moment into the weld at the base of the padeye. The...
  3. tnteng

    Crane runway beam with channel cap on W-beam

    I am trying to select an appropriate W-beam and channel cap for a runway beam that is to support an under running bridge crane. The channel cap is to be on top of the W-beam. I am using the AISC ASD code and I am having problems with what value to use for "bf" in formula F1-2. Would "bf" be...
  4. tnteng

    Wheel loading analysis on crane runnway beam

    ahunt, Thanks for the link. Can you give any input on the difference between the formulas used on the website you provided and those in section K.1.2 and K.1.3 of the AISC ASD spec. Thanks, Tony Billeaud Mechanical Engineer
  5. tnteng

    Shear stress in AISC ASD code

    Can anyone tell me why the AISC ASD code specifies the use of the average shear stress formula as opposed to the tranverse shear formula VQ/IT when computing shear stress on a beam. Thanks in advance for any help. Tony Billeaud Mechanical Engineer
  6. tnteng

    Wheel loading analysis on crane runnway beam

    Can anyone lead me to a reference that gives allowable stresses on an I-beam flange due to wheel loading from a bridge crane end truck. Thanks in advance for any help. Tony Billeaud Mechanical Engineer
  7. tnteng

    Selecting bridge beam and runway beam for bridge crane

    Can anyone direct me to a reference/website that would give some helpful information on selecting abridge beam and runway beam for a bridge crane. I will be purchasing the crane end trucks but I need to design the bridge beam and the runway beam. I can design the I-beams based on the hoist...
  8. tnteng

    Help menu in Inventor not working correctly

    matherjd, I have Inventor Series 11 with service pack 2 installed. No hot fixes are installed yet but I reviewed those and none are relavent to this issue. Our IT department installed the software on my system so I can only assume that virus scanners were disabled during installation...
  9. tnteng

    Help menu in Inventor not working correctly

    I am trying to use the help from the drop down menu and I am having problems. When I go to the Help menu and select "Help topics", a window opens with a panel at the left and the main window at the right containing all the bulleted items. When I try to select the bulleted items, the only one...
  10. tnteng

    RJ45 to RJ11 coupler needed

    Can anyone tell me where I can find an RJ45 to RJ11 female to male or female to female coupler? Thanks, Tony Billeaud Mechanical Engineer
  11. tnteng

    RJ45 to RJ11 Coupler needed

    Can anyone tell me where I can find an RJ45 to RJ11 female to male or female to female coupler? Thanks, Tony Billeaud Mechanical Engineer
  12. tnteng

    SWL's on "C" shaped pipe hooks

    Has anyone used the "C" shaped pipe hooks for lifting pipe. We have some from both Newco and Rigmaster. Newco has indicated that the SWL of the hooks is based on a sling angle of 30 deg. (included angle from horizontal). Rigmaster's SWL is based on a 45 deg. angle. Does anyone have experience...
  13. tnteng

    Stresses seen in a hinge pin

    In a previous closed thread (thread404-81231), "Superstress" suggested to use the approach outlined by Bruhn when checking stresses on a the pin an a lug clevis assembly. Does anyone know if using this analysis would be a conservative approach or if it is a close approximation of the actual...
  14. tnteng

    Structural tubing cost vs. rolled shapes cost

    Does anyone know if there is a reference that gives relative cost differences (per pound) between structural tubing shapes and rolled shapes such as W-beams and channels and plate. Thanks in advance for any help. Tony Billeaud Mechanical Engineer
  15. tnteng

    Bending stresses at base of tapered padeye/beam

    Vonlueke, Can you provide any info on the orgin or derivation of the formula you have provided? If the top of the beam is horizontal and only the bottom has the taper then the height of the base would need to be no taller than twice the height of the beam at the tip - correct? Thanks, Tony...
  16. tnteng

    Calculating the shear stress at the base of a padeye

    ...stress at the base of a lift eye (padeye) be calculated using the average shear stress formula or the transverse shear stress formula (sress=1.5*(V/A)) for a rectangular section? The padeye has transverse loading in the plane of the padeye. Thanks in advance for any help with this...
  17. tnteng

    Bending stresses at base of tapered padeye/beam

    I uncovered something that I may have overlooked in past design calculations. The question comes up when analyzing the stresses on a tapered padeye (with a long base to hole dimension) or on a tapered beam. The tapered member is loaded perpendicular to the longitudinal axis of the member. For...
  18. tnteng

    Tapered beam/long padeye design

    I uncovered something that I may have overlooked in past design calculations. The question comes up when analyzing the stresses on a tapered padeye (with a long base to hole dimension) or on a tapered beam. The tapered member is loaded perpendicular to the longitudinal axis of the member. For...
  19. tnteng

    AISC slenderness check vs AISC combined axial and bending check

    Can anyone tell me why the AISC code has both the slenderness check and the check for the loading case of combined bending and axial? Dosen't satisfying the equations H1-1, H1-2 & H1-3 act as a check on buckling. If so then why does the slenderness check need to be done? The slenderness check...
  20. tnteng

    Automating the movement of joints of pipe

    I need to come up with a design for equipment that will automatically move joints of pipe down a set of pipe racks and stop at required positions. We have two pipe racks spaced 24' apart. The joints of pipe are anywhere between 30' to 40' long and are between 20" to 48" in diameter. They need...

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