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Recent content by bridgetrool

  1. bridgetrool

    backup for concentrated load assumption

    paddingtongreen, thanks for the interest AISC 9th, chapter K, pg. 5-81 Local Web Yielding b. When the force to be resisted is a concentrated load applied at or near the end of the member. use K1-3 Web Crippling b. When a concentrated load is applied less than a distance d/2 from the end of...
  2. bridgetrool

    backup for concentrated load assumption

    For years we have gone under the assumption when temporarily supporting beams at a distance less than d/2, if welded bearing stiffeners existed between load and end of beam, that d/2 or near end of beam did not apply. We have recently been asked to supply backup for our assumption. Can anyone...
  3. bridgetrool

    HS BOLT IN PIN CONNECTION

    dhengr, are you thinking that C,QT material may not be assumed ductile? This is what we are wrestling with. As you can see, it makes quite a diff. in the calc.s thanks ishvaaag, are we manipulating the numbers or is this an acceptable method? this is what we are trying to determine. thanks...
  4. bridgetrool

    HS BOLT IN PIN CONNECTION

    dhengr, sorry about lack of info. Want to use 7/8dia HS bolts in temporary pin connection. Just wondering if the way I applied plastic and elastic is correct. A325 HS ductile, Mn = Mp = FyZ = 92ksi*.112 (Z) = 10.304k" <= 1.6 My = 1.6*92ksi*.066 (S) = 9.715k" gov., factor*.67 = 6.509k" A490 HS...
  5. bridgetrool

    HS BOLT IN PIN CONNECTION

    Designing a pinned connection. Want to use HS bolt for pin. A325 assume ductile therefore plastic design is coming out better than A490 assume brittle therefore use elastic design. Is this thinking correct? Thoughts on the matter would be appreciated. thanks bridgetrool
  6. bridgetrool

    I need to temporarily support bridg

    Thanks hokie66 for reply. It is designed, we can find no forces to weld for. The support is for 3 to 4 weeks. Looking for any input (reason to weld) thanks bridgetrool
  7. bridgetrool

    I need to temporarily support bridg

    I need to temporarily support bridge beams at abutment. Length from footing varies from 3'+- to 8'+-, want to use segmental HS12x12x3/8 with a single 1x18x18 plate between segments. No more than 4 segments per column. Neoprene will be used top and bottom for rotation at longer columns and shear...
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