Putting on my 12" to 1' hat, experience has taught railroaders to lay rail at the "neutral termperature", defined as the mid-point of the hottest and coldest termperature the rail will encounter at its particular location. If the particular day the rail is being laid isn't at the neutral termperature, rail is either warmed up with series of propane burners mounted on track carts or cooled with water sprays. Welded rail, again from experience, and now required under Federal Railroad Administration regulations, is restrained at every other tie by rail anchors clipped to both sides of the crosstie (box anchoring). Alex Huff, retired and happy to railroad in 3/16" to 1'.
--- In [email protected], "wb4hay" <nnn0tjf@...> wrote: > > We have all seen the pictures of the rail bowed up 5 feet in the air due to > thermal expansion in a hot summer. Why don't the railroads have an even worse > problem now with the mile lengths of continuous rail they run now without > expansion joints?? > > Kelly Johnson > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
