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  1. jmen68

    Below the Hook Training Couse/Seminar

    I consider myself fairly versed in BTH-1 and B30, but would like to attend a course/seminar from a guru on the topic. Im thinking a week long, classroom style, page turn of the spec with worked out examples. Anyone know if this exists? Some of the best education and growing as an engineer have...
  2. jmen68

    Temp sliding bearing design

    bridgsmith, excellent suggestion, but we're locked in that direction with the anchor bolts. Slots in the sole plate are the opposite direction of intended sliding.
  3. jmen68

    Temp sliding bearing design

    Perm bearings are elastomeric. The main focus is to get the girders back centered on the sole plates, the bridge is still under construction and there isnt a deck. The jacks we will be using will be a bit squirrly to slide on top of them, which is why were looking to lower it back down on the...
  4. jmen68

    Temp sliding bearing design

    I need help with a temporary fix. I need to design a sliding bearing to shift a bridge a few inches (like 2in max). 5 girders max vertical reaction at each girder will be about 50 kips. My plan is to jack the bridge up using hydraulic rams, place a PTFE sheet sandwich between the bottom flange...
  5. jmen68

    Recomendation of alloy to strike with a hammer

    Excellent, thanks for the suggestions!
  6. jmen68

    Recomendation of alloy to strike with a hammer

    I am searching for a steel alloy recommendation to make a shop made tool that is basically a longer and larger diameter nail set tool, nail set like you would use in carpentry to countersink a nail. I am searching for, hopefully, a non exotic alloy that can be purchased easily in round bar...
  7. jmen68

    Weldment failing after cyclical loading.

    The embarrassing sketch...https://files.engineering.com/getfile.aspx?folder=937de269-970f-482c-bc50-ff2b444dceb9&file=Adapter_sketch.jpg
  8. jmen68

    Weldment failing after cyclical loading.

    GC - Our QC is good, I am confident the welders are producing good welds, and following procedures. dhengr - I get that it is a silly statement. Just kinda wanted to direct focus to the point. I have attached a very poor sketch for everyone's entertainment. Failure on the really bad ones are...
  9. jmen68

    Weldment failing after cyclical loading.

    Yes, we use those as well. Many of our applications aren't conducive to vibratory driving.
  10. jmen68

    Weldment failing after cyclical loading.

    Without getting into the weeds to much with specifics, my company does pretty specialized pile driving and we use shop made adapters to drive varying pile sizes, larger and variable shapes that need an adapter for the hammer. The adapters are usually weldments of some shape using usually carbon...
  11. jmen68

    Notes and Tips to Welder

    Thanks everyone for your input, I'll try and do you all proud! [bigsmile]
  12. jmen68

    Lifting hook analysis and design for Post tensioned AASHTO Girder

    I ran into this problem not to long ago. Sadly see this excerpt... From AASHTO LRFD 2014: "AASHTO LRFD Bridge Construction Specifications places the responsibility on the Contractor to provide adequate devices and methods for the safe storage, handling, erection, and temporary bracing of precast...
  13. jmen68

    Notes and Tips to Welder

    I plan to be giving a brief talk during an AWS - Welders Night Out about topics we engineers think about when designing welds. Not calculations but some "whys and other things related". If you all wouldn't mind letting me know from your experiences what are some things you would or possibly...
  14. jmen68

    Hilman Roller on Aluminum Flat

    @RACOOKPE1978 My man, that is what I am trying to figure out, if the aluminum is hard enough and can be substituted.
  15. jmen68

    Hilman Roller on Aluminum Flat

    Hilman said Aluminum isn't acceptable, no other reason. I have to man handle all these pieces, I wanted aluminum to save weight. S/S is out because its heavier then C/S. I have Roark, never used it, think table 14.1.2 is the right spot? I am still unsure if I can do the equation with any...
  16. jmen68

    Hilman Roller on Aluminum Flat

    I have an application were it would be beneficial to use an aluminum (6061-t6) channel or plate (has to be manhandled) to use as my rolling surface for a loaded hilman roller. I am using a Hilman roller model 20-OT that has 5 contact rollers that are 4" long X 1.18" OD. My load is 39.5 kips per...
  17. jmen68

    mill report for rebar

    See attached for a mill cert for gr.60 rebar. You could also look up the spec your required to use and that will have acceptable chemical composition ranges.http://files.engineering.com/getfile.aspx?folder=4f67fcc6-b1f8-4311-9445-3b05fb283d7e&file=Gr60_rebar_mill_cert.jpg
  18. jmen68

    Looking for suggestions on lifting device

    Sure thing JGard1985. Well all of these suggestions were great in their own way, the one I liked the best was from user bridgebuster. The monkey fist product looked to fit the bill, and a quote from Maxwell Supply, the sellers of the monkey fist product, came in about $350 US a piece which was...
  19. jmen68

    Resources on Fatigue Design of Weldments

    My schooling as a CE didn't really teach me much in the realm fatigue in weldments and connection design. But now in my career I am attempting to do this design work and am needing resources to teach myself how to do this. If anyone has any "fatigue design for dummies" resources that helped you...
  20. jmen68

    Looking for suggestions on lifting device

    I am demoing an old reinforced concrete 10 inches thick, we will be saw cutting the deck into pieces ranging from 15' to 20' long x 4' wide (about 8,500 to 11,000 lbs). I am looking for unique suggestions on how to attach my rigging to the cut pieces. I will have no access to the bottom side so...

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