Editing Truss bridge (section)

=== Allan truss ===
[[Image:Hampden Bridge Wagga design.jpg|thumb|An Allan truss]]
The '''Allan truss''', designed by [[Percy Allan]], is partly based on the [[Howe truss]]. The first Allan truss was completed on 13 August 1894 over Glennies Creek at Camberwell, New South Wales and the last Allan truss bridge was built over Mill Creek near [[Wisemans Ferry, New South Wales|Wisemans Ferry]] in 1929.<ref>{{cite web|title=Timber Truss Bridges|url=http://www.rta.nsw.gov.au/environment/downloads/heritage/bridge-types_historical-overviews_2006-timbertruss.pdf|work=McMillan Britton & Kell Pty Limited|publisher=Roads and Traffic Authority|access-date=23 November 2010|date=December 1998|archive-date=19 March 2011|archive-url=https://web.archive.org/web/20110319232920/http://www.rta.nsw.gov.au/environment/downloads/heritage/bridge-types_historical-overviews_2006-timbertruss.pdf|url-status=live}}</ref><ref>{{cite web|title=Tharwa Bridge Conservation Management Plan|url=http://www.cmd.act.gov.au/__data/assets/pdf_file/0009/148509/Tharwa_Bridge_CMP_reduced.pdf|work=Philip Leeson Architects|publisher=Roads ACT|access-date=23 November 2010|pages=42, 45|date=5 March 2009|archive-date=21 February 2011|archive-url=https://web.archive.org/web/20110221182535/http://www.cmd.act.gov.au/__data/assets/pdf_file/0009/148509/Tharwa_Bridge_CMP_reduced.pdf|url-status=live}}</ref> Completed in March 1895, the [[Tharwa Bridge]] located at [[Tharwa, Australian Capital Territory]], was the second Allan truss bridge to be built, the oldest surviving bridge in the [[Australian Capital Territory]] and the oldest, longest continuously used Allan truss bridge.<ref>{{cite web|title=1307.8 – Australian Capital Territory in Focus, 2007|url=http://www.abs.gov.au/ausstats/abs@.nsf/Products/80BD523C6BA53B02CA2573A1007B2DA5?opendocument|work=[[Australian Bureau of Statistics]]|access-date=23 November 2010|date=27 November 2007|archive-date=14 October 2012|archive-url=https://web.archive.org/web/20121014225551/http://www.abs.gov.au/ausstats/abs@.nsf/Products/80BD523C6BA53B02CA2573A1007B2DA5?opendocument|url-status=live}}</ref><ref>{{cite web|title=Tharwa Bridge|url=http://www.engineer.org.au/tharwa_bridge.html|url-status=dead|archive-url=https://web.archive.org/web/20110219064151/http://www.engineer.org.au/tharwa_bridge.html|archive-date=2011-02-19|access-date=23 November 2010|work=[[Engineers Australia]]|publisher=Canberra's Engineering Heritage}}</ref><ref>{{Cite web|title=July 2010 Newsletter {{!}} Engineers Australia|url=https://www.engineersaustralia.org.au/resource-centre/resource/july-2010-newsletter-0|access-date=2021-03-24|website=www.engineersaustralia.org.au|archive-date=2021-10-01|archive-url=https://web.archive.org/web/20211001045013/https://www.engineersaustralia.org.au/resource-centre/resource/july-2010-newsletter-0|url-status=live}}</ref> Completed in November 1895, the [[Hampden Bridge (Wagga Wagga)|Hampden Bridge]] in [[Wagga Wagga, New South Wales]], Australia, the first of the Allan truss bridges with overhead bracing, was originally designed as a steel bridge but was constructed with timber to reduce cost.<ref>{{cite web|title=Minutes of State Heritage Register Committee meeting|url=http://www.heritage.nsw.gov.au/docs/heritagecouncil/shrNovember_2008.pdf|archive-url=https://web.archive.org/web/20110317131142/http://www.heritage.nsw.gov.au/docs/heritagecouncil/shrNovember_2008.pdf|url-status=dead|archive-date=17 March 2011|work=State Heritage Register Committee|publisher=Heritage Council of New South Wales|access-date=23 November 2010|page=5|date=5 November 2008}}</ref> In his design, Allan used Australian [[ironbark]] for its strength.<ref>{{cite web | title = Hampden Bridge, Wagga Wagga, NSW | publisher = Timber Building in Australia | url = http://oak.arch.utas.edu.au/projects/view_projectinfo.asp?projID=21 | access-date = 2008-06-05 | url-status = dead | archive-url = https://web.archive.org/web/20130512053920/http://oak.arch.utas.edu.au/projects/view_projectinfo.asp?projID=21 | archive-date = 2013-05-12 }}</ref> A similar bridge also designed by Percy Allen is the [[Victoria Bridge, Picton|Victoria Bridge]] on Prince Street, [[Picton, New South Wales]]. Also constructed of ironbark, the bridge is still in use today for pedestrian and light traffic.<ref>Google-maps "-34.180255,150.610654" clearly shows bridge with traffic</ref>