Timber wood pro carpenter and finishes carpentry of city of norwalk connecticut usa

 A timber bridge or wooden bridge is a bridge that uses timber or wood as its principal structural material. One of the first forms of bridge, those of timber have been used since ancient times. Wooden bridges could be a deck-only structure or a deck with a roof. Wooden bridges were often a single span, but could be of multiple spans. A trestle bridge is a bridge composed of a number of short spans. Each supporting frame is a bent. Timber and iron trestles (i.e. bridges) were extensively used in the 19th century. A covered bridge is a timber-truss bridge with a roof, decking, and siding, which creates a nearly complete enclosure.The purpose of the covering is to protect the wooden structural members from the weather. Uncovered wooden bridges typically have a lifespan of only 20 years because of the effects of rain and sun, but a covered bridge could last 100 years.