it is used so when sunlight falls on the bridge and it will expand so it will no crack
Steel
So it can expand
Granite
The gaps allow the steal to expand as the day gets hotter, and prevent the steal from buckling.
bridges are colapsing because they are old and the material that the people used is old or the people that built it did not build it right
Due to repeated stress and strain, the material used in the bridges loses elastic strength and ultimately may be collapsed. Hence, bridges are declared unsafe after long use
The primary building materials in cable-stayed bridges are steel, which is used in the cables and also as the reinforcing material in the concrete, which is the other primary building material.
please tell me the answer!
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 Romans used the arch to build large buildings and bridges.
so that if they calaps the other one will not calaps together
Wood filler is not as strong as wood when used for repairs or filling in gaps. It is a material that is used to fill in small imperfections in wood surfaces, but it is not as durable or sturdy as the wood itself.