U-frame Analysis necessary even after designing everything in STAAD?

Hi all,

I have modeled a Steel Foot Bridge with Lattice Truss structure. I find all the members passing checks (* except few diagonal flats failing in Cl. 6.2.9.1 which is not necessary in this case, to be ignored.) 

I will be doing Connection design manually. 

My question is Do I still need to do a U-Frame analysis manually ? as is customary in BD or EU codes? 

Please check my model which is attached herewith.

Regards

Mahesh

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