why do some bridges have weight limits that depend on how many wheels

1.	why do some bridges have weight limits that depend on how many wheels or axles the crossing vehicle has?
Answer» Answer: Because it can HOLD the weight of CERTAIN VEHICLES of certain wheels

why do some bridges have weight limits that depend on how many wheels or axles the crossing vehicle has?

Answer»

Answer:

Because it can HOLD the weight of CERTAIN VEHICLES of certain wheels