In search of America's old covered bridges

作     者：Ronald G.Knapp 

作者机构：State University of New YorkPO Box 365New PaltzNY 12561-0365USA 

出 版 物：《Built Heritage》 (建成遗产（英文）)

年 卷 期：2021年第5卷第2期

页      面：16-38页

核心收录：

学科分类：0303[法学-社会学] 0601[历史学-考古学] 1301[艺术学-艺术学理论] 081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 0603[历史学-世界史] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

主　　题：Covered Bridge Timber truss Burr truss Town lattice truss Perrine's Bridge New Palt Bridge Phillies Bridge New York State New Paltz Conservation Restoration 

摘      要：America s first documented wooden covered bridge was erected at Philadelphia,Pennsylvania in *** were constructed within two decades and at least 10,000 by the later *** settlers moved West,broad rivers were crossed with inventive structures incorporating timber trusses ingeniously developed by *** covered bridges because of the roof and siding needed to protect the timber trusses,they became ubiquitous features on the American *** the past two centuries,most covered bridges were lost to flood,ice,arson,lightening,decay,as well asprogress,replaced bymoderniron,concrete,and steel *** some 700 covered bridges remaining,many are mere replicas of their original forms no longer supported by timber *** historic bridges remain largely from the last half of the 1800s while civic boosterism has led to claims of earlier dates with often questionable *** essay presents three wooden covered bridges constructed in the 1820s along a 10-mile stretch of the Wallkill River in New Paltz,New *** the three,only Perrine s Bridge,constructed first in 1821 and covered in 1822,is still standing with intact Burr timber *** s is an iconic structure with exceptional heritage value because of authentic re-building and restoration in 1834,1846,1917,and *** documentary records,this essay establishes an accurate intertwined chronology for the three bridges,detailing nineteenth century building practices and contentious mid-twentieth century struggles pitting preservationists wanting authentic restoration against those wanting removal.