Single Span Bridge Seismic Requirement per CHBDC

[tmalik3156]

Good day all.
Canadian Code (CHBDC) says that single-span Girder bridges with small skew don't need to be analyzed for seismic demands. It does not say anything about single-span trusses.
In my opinion, trusses are comparable to girders in the sense that top chord = top flange in compression, bottom chord = bottom flange in tension, diagonals = girder web to carry shear.
Can we extend this Clause to single-span Truss bridges as well?

 

[KootK]

That sounds entirely reasonable to me.

 

[bugbus]

Isn't a truss just a girder with really big holes in it?

 

[Lomarandil]

Eh, while this may pan out from an engineering perspective (depending on the method of truss fabrication — many truss connections are more complex and less redundant than a fully welded plate girder), I think you’re sailing toward a fight with the owner’s engineer. I’d start that discussion to get their buy-in now.