Here is the French heavy bridging equipment available to support the armoured division. First off on the left is an EFA amphibious ferry in travel mode (Scotia FM0046). On the right is the Leguan bridge layer, again in travel mode. Note the AMX-30 stand on a 40x20mm base in the middle for scale - the big boys are mounted on 80x20mm bases.
So, these various bridging assets should allow the French to cross any river obstacle up to a scale of 120mm, provided the enemy don't interfere.
Thanks for looking.