Unbraced Length - Footbridge
Unbraced Length - Footbridge
(OP)
I am designing a footbridge in an industrial environment. The span of the bridge is 9650mm, the width 900mm. The diagonal bracing connected to the compression flange of the main beams definitely provides lateral bracing, but do the intermediate transverse beams also provide lateral support (assuming they are connected to the web of the main beam, T.O.S. being equivalent for all members)?
Referencing my attachment, is Lu 1608mm or 3216mm?
http://fil es.enginee ring.com/g etfile.asp x?folder=0 ee488ae-16 f0-4c2a-81 ca-59c4488 c8946& file=Foot_ Bridge.JPG
Thank you,
Carl, ing. jr.
Referencing my attachment, is Lu 1608mm or 3216mm?
http://fil
Thank you,
Carl, ing. jr.






RE: Unbraced Length - Footbridge
Upon verification of the adequacy of the torsional bracing system, Lb could be taken 1608 mm.
I attach a screen printout of a Mathcad 2000 worksheet I made following the torsional bracing example. If interested, I may post a zip with the worksheet.
RE: Unbraced Length - Footbridge
This because the orthogonal joints are as much panel points as where the diagonals meet.
RE: Unbraced Length - Footbridge
Thank you very much for your help.
Carl
RE: Unbraced Length - Footbridge
BA
RE: Unbraced Length - Footbridge
RE: Unbraced Length - Footbridge
RE: Unbraced Length - Footbridge
RE: Unbraced Length - Footbridge
And thanks, JAE. Now I know the difference between relative and nodal braces.
BA