I got two filed column, then I added cross bracing there, coulmn found passed but the brcaing is not passes, not with big section. Please check the issue. you can change the type of bracing, please make the bracing pass. If we can omit the bracing and make pass the column that attached with bracing is also okay. ( I have add a beam in the mid of column as mid landing beam for stair, and there were bracing, 3 stairs and in 3 places i have done the same, is it okay? will it create any problem for construction?) THANKS IN ADVANCED.
V8.-STaad02.09 Project_Full.std
Use a thicker section (SHS120x8) for failed x-bracing and set LZ and LY to 1/2 length only since there will be connections between middle of bracings and beam.
I believe no problem for construction as long as proper connection and arrangement drawings are prepared.
Answer Verified By: kamal hosen
Thanks for your suggestion. It passed when i used 120X10. but do i need to LZ & LY for thes etype of cross bracing ? I used for column and rafter before. for bracing, haven't use before. can you please tell me how i can understand that which one will be LZ & which one will be LY. Thanks a lot.
Hi Kamal, if the bracing pass by changing the section to SHS120x10 and without reducing its LZ/LY then no need to change LZ/LY.
If the bracing fails because of axial compression, one way to get around it is to reduce its effective length (usually 1/2) since in reality you would have a cross bracing connection in the middle of both bracing and the beam.
I would suggest to change the LZ and LY of the bracing to 1/2 of its length using SHS120x5. If it fails then increase the thickness of SHS till it pass.