First of all, here is the Teddy .dat file link: three span box girder bridge.dat (4.8 KB)

Basiclly it’s a 3-span concrete single box with two cells girder bridge.

The cross section has 26 independent variables, like ‘H’ - box total height, ‘Wt’ - top slab width, ‘Tt’ - top slab thickness, etc

The cross section also has 38 derived variables.

The cross section can be drived by previous mention 26 independent variables,

e.g. H=1.5m

H=3.0m

I create an axis variable H (box height) in SofimshC

the result looks correct to me

BUT, the generated bridge has constant sections, **NO** variation along the axis