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  1. mecheng19777

    Problems with J or L bolts?

    I just look at a regular hex bolt and the head has so little surface area, but I guess you are saying that is all that is needed and the head of the bolt is stiff and therefore won`t bend?
  2. mecheng19777

    Problems with J or L bolts?

    Ok so I gave the L bolt some more thought, is the issue the following: when it is loaded in tension, it will naturally want to torque and in doing so it could break the concrete. So what you guys are recommending is a simple anchor bolt, and if I can get a 1/4 inch plate sandwhiched between...
  3. mecheng19777

    Problems with J or L bolts?

    Hello, I came across this thread when researching L bolts to secure a 2x4 wall to a concrete block foundation for a single car garage project I am working on. I don`t understand the issue with L bolts, I thought they would be superior to a regular bolt with washer. CSA shows you can use them...
  4. mecheng19777

    Expansion of Holes Question

    I took RVAmeche (Mechanical) advice and drew it in cad, scaled it by an appropriate factor to get 5/16" length and the hole expanded by 0.0008". Basically, by a blond one. My theory gave the same result: 1.1875 / (39*12) = 0.0025% 0.0025% x 5/16 = 0.0008" Thanks all.
  5. mecheng19777

    Expansion of Holes Question

    Yes my mistake, 0.0008". I am trying to make sure I have enough clearance in my bolt holes. The bolt is a track bolt which has a oval locking head. The bolt is 1" diameter; using a 1 3/16" hole, but the oval slot has only 1/16" clearance. So I would like to know how the bolt hole...
  6. mecheng19777

    Expansion of Holes Question

    I have a 39 ft piece of steel, which will expand/contract 5/16" over an operating temperature of -20C (-4F) to 40C (104F), using the steel coefficient of expansion. In that piece of steel, I have 1 3/16" (1.1875") holes, and I'd like to know how much the holes will expand/contract. Is it only...

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