By Technology developing and also people researching how to make bridges and thinking of new ways to make bridges and new materials to use.
some materials used in bridges are concrete, steal, metal [may rust and fall if metal ] the first bridge may or may not have been made of wood
Being able is the correct version of the sentence. You can use it as a fragment of any sentence.
There are different types of bridges. There are bridges that have been built to ease traffic congestion in large cities; bridges have been built across rivers and the ocean to allow cars and trucks to travel from one place to another; bridges have been built to allow pedestrians to pass over highways safely. Bridges link places, so people are able to travel with ease between places. Goods can be carried on bridges and therefore trade is made possible.
At first which metal had been used by human ?
'Tarred bridges' presumably means what it says: bridges that have been coated with tar. This presupposes that the bridges are made of wood, and the tar has been applied as a preservative and waterproofing treatment.
Metal and Steel ANSWER B: The majority of arch type bridges and viaducts were made from brick or stone. Concrete has also been used.
Truss Bridges=Trusses have been used extensively in bridges since the early 19th Century. Early truss bridges were made of wood.==in additon the classic American covered bridges are all trusses, though the wooden truss members are covered by walls and a roof, for protection from the elements. Later truss bridges were made of cast iron and wrought iron. Most modern trusses are made of structural steel.=
wath is the cause of swollen foot and face after been heat by a metal.
Tornadoes have caused bridges to collapse on a number of occasions. In some cases pieces of bridges have been carried away by tornadoes.
Calcium metal is extremely soft and brittle but the mineral calcium carbonate is already a component in many bridges and has been for about three thousand years. Calcium carbonate is a component of concrete. The Romans were the first to use concrete.
Adam Gavzer has: Played Page in "Murrow" in 1986. Played American Salesman in "Hot Metal" in 1986. Played Waiter in "Nash Bridges" in 1996. Played Sax Freyman in "Nash Bridges" in 1996. Played Steven in "Gypsy Boys" in 1999.
The first bridges are likely to have been fallen trees or logs placed across streams.