John Roebling
Caleb and Thomas Pratt invented the truss bridge in 1844. Some of the materials that have been used in truss bridges are timber, steel, reinforced concrete, and iron.
The exact year the truss bridge was invented is not known. Early forms of truss bridges were seen as earl as 1820 and iron truss bridges did not appear until 1850.
They used only themselves.
it was invented before 2013
Bridges
Stone bridges were built to get over rivers etc, before iron or steel was used.
Glass was used before film was invented.
The Romans used the arch to build large buildings and bridges.
John Roebling
to get to the other side
Cement was used by the Romans to build the colosseum. The Romans invented cement and the material they invented was also water proof which allowed for bridges and fountains to be built.
Usually concrete. Romans invented concrete.
simeon s. post
There were (and still are) other bridges that can be used.
candles
Brains.