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  1. ChrisToms

    Check for flange to web weld of plated section

    Hi all steel experts there.. Below shown is connection for truss. My primary objective is to check the adequacy of weld (in purple) Member I is top chord of truss, II vertical and II diagonal truss member. We have shear force on member I at the location of connection, say 300kN (this will...
  2. ChrisToms

    Tower crane foundation - negative pressure

    Hi all..thanks all for your valuable replies..Yes I understand that when there is negative pressure (or to re-phrase P/A-M/Z is negative) there is re-distribution of soil pressure since the bearing area will be reduced. My question was if the overturning FOS >2 and the maximum bearing pressure...
  3. ChrisToms

    Tower crane foundation - negative pressure

    @Agent666 Thanks for your reply. And yeah by negative pressure i mean there is an uplift (P/A-M/Z is a negative value). I guess some codes allow certain percent of uplift but I can find a reference for that in ACI or ASCE. And yeah since P/A-M/Z is negative, the reaction of course does not fall...
  4. ChrisToms

    Tower crane foundation - negative pressure

    Hi all.. i am designing a tower crane base. The footing is safe in overturning although it has about 25% of its area in negative pressure for out of service condition. The design is carried out based on ACI code. I am not able to find any clause related to maximum percentage of negative pressure...

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