On the chance that you are not just looking for some clever reply or punchline, your question is a bit broad. Please consider resubmitting it and try to be more specific. For example: Are you interested in knowing the types of building materials that are used to construct houses, bridges and roads? Or, do you want to know about the tools and equipment used? Or, perhaps your question is in regard to the people involved in building these things? There are some materials and tools that are common to the construction of all three. If we are talking about people however, the person who builds highways will probably have different training than one who builds houses, or maybe even bridges.
Iron is not used to build houses, but iron is used in other things because it is strong.
Yes, they can but it's not necessary. Civil engineers are more of a profession where they build on bigger scales, like towers, bridges, dams...etc. Constuction workers are mostly used in building houses.
Taxes collected from citizens are used to build roads, bridges, and other things in their communities. It also funds welfare programs for people in need.
The ancient Romans used their engineering skills to build aqueducts, bridges, roads, domed structures, the hypocaust heating system and any other building projects they undertook.
they used mud bricks to build houses
houses and roads
Rocks may help in building stable stone structures, such as fireplaces, bridges, and houses.
Sometimes, due to the road mixture used, bridges can be icy while the rest of the road is not.
Concrete and steel .
The designs that are used to build bridges are designs that can keep them stable , working and that won't be dangerous also designs that amaze people.
The Romans used the arch to build large buildings and bridges.
The Chinook used cedar wood to build their houses.