Re: Bridge on a slight curve...

Posted by Chris Walker on Nov 26, 2015; 9:15pm
URL: http://c-sng-discussion-forum.254.s1.nabble.com/Bridge-on-a-slight-curve-tp4047p4053.html

Jeff,
only the Rails are curved, the deck panels are a series of tangents the length of the stringers, the only deviation I've ever seen to this was the deck of the Colorado Midland trestle at Hagerman, and that may have been to do with the wider radius of the curve and SG.


 http://digital.denverlibrary.org/cdm/fullbrowser/collection/p15330coll22/id/39155/rv/singleitem/rec/67


http://digital.denverlibrary.org/cdm/fullbrowser/collection/p15330coll22/id/90656/rv/singleitem


http://digital.denverlibrary.org/cdm/fullbrowser/collection/p15330coll22/id/69910/rv/singleitem/rec/7


http://cdm16079.contentdm.oclc.org/cdm/fullbrowser/collection/p15330coll22/id/72060/rv/singleitem/rec/6

Be sure to check your Trestle Standards for Stringer length, the C&S had differences from the Grande/RGS and keep in mind, a lot of modellers mistakenly scribe a joint directly over each and every Bent.  


http://cdm16079.contentdm.oclc.org/cdm/fullbrowser/collection/p15330coll22/id/10322/rv/singleitem

Unless the curve is very sharp, the Stringer should carry over one bent without a joint, the inner stringer being staggered so as to create the strongest possible joint.  The Gregory Street Bridge is the only example I can show you of this.


http://digital.denverlibrary.org/cdm/fullbrowser/collection/p15330coll22/id/78555/rv/singleitem/rec/44