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  1. Doublest

    elastic torsional buckling force (or stress)?

    Hi guys, In AISC, AISI codes and all other of my available structural books I only see the formulas for elastic flexural buckling force. No elastic torsional buckling force formula was found. Can anybody help me to find the formula for elastic torsional buckling force (or stress)? Thank you...
  2. Doublest

    How many days to allow contractor to take off forms from concrete wall

    Hi guys, I have a question need your help. About how many days do you allow a contractor to take away the form from a poured concrete foundation wall? The wall has no external load at all except its own weight, the contractor wants to take away the form the next day after the concrete is...
  3. Doublest

    Do you apply Kd to W when dealing with uplift effect?

    ASCE7-05 Table 6-4 says: Directionality Factor Kd shall only be applied when used in conjunction with load combinations specified in 2.3 and 2.4. This Directionality Factor Kd basiclly reduces the wind load value. I can see its reasonablity by using reduced "W" when calculating combined...

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