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Recent content by Barn Owl

  1. Barn Owl

    Calling all structural engineers

    Yes I realize, but I also am not going to just weld a box to a C, I am going to gradually diffuse the stress point over 18". I understand your concern and I have experience in this situation but yes it is good to discuss these issues.
  2. Barn Owl

    Calling all structural engineers

    Just a side note, in the 17 years I have been an instructor and the 30 years I have been a welder, only a hand full of engineers have taken my class. I always appreciate when pre or even established engineers take a welding class so they understand the welding process and their designs take into...
  3. Barn Owl

    Calling all structural engineers

    Yes you are right, I was typing my last response on my phone and knew the photo aspect would be helpful. Although I am not a draftsman and my computer does not have any design software, it does have some rudimentary shapes available. So here goes... To explain the simple sketch, The round tube...
  4. Barn Owl

    Calling all structural engineers

    Thanks Fastline for that informative reply. I will be using A36 for the entire frame and the connection point will be spread over 18”. The inside plate of the box will gradually angle toward the outside vertical member of the C. I was not planning to have too many cross members in the rear...
  5. Barn Owl

    Calling all structural engineers

    Yeah I am not too concerned about cracking. If the connection is designed correctly that spreads load out over a distance it will be fine. If welds failed anytime there was a thick to thin or stiff to flex connection I would be out of a job and they would start glueing all vehicles together like...
  6. Barn Owl

    Calling all structural engineers

    Haha, I am the hot rodder that people ask these questions to. But most hot rodders are shade tree mechanics and they are making guesses based upon experience. I am looking for more data driven results. Just to give a bit more of my pedigree, I have lengthened, shortened, notched, modified, and...
  7. Barn Owl

    Calling all structural engineers

    Well the load I want to be able to haul is 2000, the truck weighs in at 5000, so there's that portion.
  8. Barn Owl

    Calling all structural engineers

    Yes pictures are worth a thousand words, I was really just cracking the ice with the first post to see if you guys would be interested in weighing in on my project. So here is the C30. It is a 1971 one ton dually that was converted to a camper at the Chevy dealership. It was first sold this way...
  9. Barn Owl

    Calling all structural engineers

    Some of this post will make better sense after reading my intro. I am building a 1971 Chevy 1 ton flatbed dually. Currently the frame rails are 1/4” C. I am going to box the rails from the cab back since they will be visible. My engineering question for y’all is: will a 3/16” rectangle tube be...
  10. Barn Owl

    New from San Diego

    I guess I should explain my handle “Barn Owl” as I stated above, I hot rod classic cars. There is a term in the hot ridding world called “barn find” which means a car that has been all but forgotten in grandpa’s barn and it has been saved from rotting away. I am the owl who searches old barns...
  11. Barn Owl

    New from San Diego

    Hi all, My name is Mike and I am not a heavy equipment operator, although I have trained welders who fix them when they break. I have been a welding instructor at a local college for 17 years. I hot rod classic cars/trucks and I combine those two skills into art. I typically adopt a practice...
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