The materials used in a bridge can vary depending on the type of bridge and load, but the most common materials are wood, iron, steel and concrete. Sometimes a bridge can be a combination of materials. Concrete reinforced with steel rods or bars is a prime example of materials combined to make a stronger bridge.Know More
The type of material used in each bridge is determined by multiple factors, including the size, shape and type of load that will pass over it. Another important factor is the availability of materials. Bridges in the past were most often made of wood or stone. Wood was used for shorter spans and stone for archway-style bridges. As advances in technology brought steel and iron into the mix, bridges could be made sturdier, to last longer and cover larger expanses. Using iron, steel and concrete allows for a wide variety of bridges to be made.
Beam-style bridges, which can often be seen going over interstates, are typically a steel and concrete style bridge. Suspension bridges, like the Golden Gate Bridge, have concrete footers with towers built out of steel on top of them. The towers have steel cables attached that hold up the driving surface and allow the bridge some movement without breaking.Learn more about Industries
Some common materials that absorb sound well and that can aid in noise reduction are carpeting, gypsum wall board, mineral fiber ceiling tiles and fiberglass ceiling tiles. Materials that contain a greater degree of mass tend to be the better sound absorbers, but this may not hold true for low-frequency sounds, which are difficult to block and will also curve around barriers. Porous materials, such as cork and foam rubber, are effective in reducing sound transmission because of the decoupling effect produced by their internal air spaces.Full Answer >
Materials used to build castles include earth, wood and stone. Motte-and-bailey castles were made of earth and wood, but due to weaknesses in these castles, stone castles were created.Full Answer >
Some materials used for subfloors are vinyl, carpeting, wood and concrete. Homeowners can choose to install engineered-wood flooring over a wood subfloor or concrete slab.Full Answer >
Materials used to construct the Eiffel Tower include wrought iron, steel and paint. Wrought iron forms the majority of the tower structure while steel provides additional support and paint adds aesthetic appeal along with protection from corrosion.Full Answer >