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原文传递 Inspection of Timber Bridges in the Pacific West (ID-150)

题名：	Inspection of Timber Bridges in the Pacific West (ID-150)
作者：	Williamson, T.; Coombe, L.; Strahl, D.
关键词：	Timber bridges##Field inspections##Timber components##Pressure treated wood##Sawn timber##Glulam##Performance##Pacific West (ID-150)##NBI ratings##
摘要：	Thirty timber bridges were inspected in the Pacific West region. Twenty four were sawn timber bridges and six were glulam. For the sawn timber bridges, all of the timber components were pressure treated DF with the exception of one bridge which was not treated and one bridge that was treated with copper napthenate. For the sawn timber bridges, 21 had multiple girders and the remaining 3 had longitudinal slab decks. The sawn timber bridges ranged in age from 31 years to 78 years and were determined to be meeting performance expectations. The glulam bridge components were all DF and were pressure treated with penta in oil. Four of the glulam bridges were multiple girder bridges with either a timber or concrete deck and the other 2 were longitudinal glulam deck bridges. The glulam bridges have been in service from 21 years to 46 years and were determined to be performing at a good or very good level.
总页数：	10
报告类型：	科技报告