Timber bridge
It is the oldest wooden covered bridge in Europe, and one of Switzerland's main tourist attractions.Today, timber bridges are promoted as environmentally friendly, and as a way to protect water quality and the habitat along waterways.[3] The passing of TBI and ISTEA by the US Congress has provided an impetus to identify and develop standard designs for timber bridges, which the US Forest Service has done.[4] The US Forest Service has designed standardized plans for timber bridge superstructures made of treated lumber.Wood laminated by stress, glued, dowels, or nails lumber are good for panel bridges.
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