A log bridge is a bridge that uses logs that fall naturally or are intentionally felled or placed across streams. The first manmade bridges with significant span were probably intentionally felled trees. The use of emplaced logs is now sometimes used in temporary bridges used for logging roads, where a forest tract is to be harvested and the road then abandoned. Such log bridges have a severely limited lifetime due to soil contact and subsequent rot and wood-eating insect infestation. Longer lasting log bridges may be constructed by using treated logs and/or by providing well drained footings of stone or concrete combined with regular maintenance to prevent soil infiltration. This care in construction can be seen in the bridge illustrated, which has well locked dry set stone abutments and a footpath leveled with boards.
Famous quotes containing the words log and/or bridge:
“Why do you see the speck in your neighbor’s eye, but do not notice the log in your own eye?”
—Bible: New Testament, Matthew 7:3.
Jesus.
“Oh, who will now be able to relate how Pantagruel behaved in face of these three hundred giants! Oh my muse, my Calliope, my Thalie, inspire me now, restore my spirits, because here is the ass’s bridge of logic, here is the pitfall, here is the difficulty of being able to describe the horrible battle undertaken.”
—François Rabelais (1494–1553)