beam bridges are usually the cheapest. The cost usually depends on the size of the bridge and the materials used. Beam bridges usually consist of storng wood and san small gaps, therfore being the cheapest to build. Although they are cheap, they are not the strongest nor the most reliable and can not span large gaps.
The cheapest type of wood that stains well is pine.
it is a type that you like
beam bridges are usually the cheapest. The cost usually depends on the size of the bridge and the materials used. Beam bridges usually consist of storng wood and san small gaps, therfore being the cheapest to build. Although they are cheap, they are not the strongest nor the most reliable and can not span large gaps.
The newest type of bridge is a cable-stayed bridge
It is a suspension bridge.
beam bridge
A suspension bridge.
The Severn Bridge is a suspension bridge.
a type of bridge
beam bridge
it is a suspension bridge...
It is a beam bridge