Non-conventional tie forms Railroad tie

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1 non-conventional tie forms

1.1 y-shaped ties
1.2 twin ties
1.3 wide ties
1.4 bi-block ties
1.5 frame ties
1.6 ladder track





non-conventional tie forms
y-shaped ties

y tie track next conventional track


an unusual form of tie y-shaped tie, first developed in 1983. compared conventional ties volume of ballast required reduced due load-spreading characteristics of y-tie. noise levels high resistance track movement good. curves three-point contact of y steel tie means exact geometric fit cannot observed fixed attachment point.


the cross section of ties i-beam.


as of 2006 less 1,000 km of y-tie track had been built, of approximately 90-percent in germany.


twin ties

the zsx twin tie manufactured leonhard moll betonwerke gmbh & co kg , pair of 2 pre-stressed concrete ties longitudinally connected 4 steel rods. design said suitable track sharp curves, track subject temperature stress such operated trains eddy brakes, bridges , transition track between traditional track , slab track or bridges.


wide ties

concrete monoblock ties have been produced in wider form (e.g. 57 cm (22 in)) such there no ballast between ties; wide tie increases lateral resistance , reduces ballast pressure. system has been used in germany wide ties have been used in conjunction getrac a3 ballastless track systems.


bi-block ties

bi-block (or twinblock) ties consist of 2 concrete rail supports joined steel bar. advantages include increased lateral resistance , lower weight monobloc concrete ties, elimination of damage torsional forces on ties center due more flexible steel connections. tie type in common use in france, , used on high-speed tgv lines. bi-block ties used in ballastless track systems.


frame ties

frame ties (german: rahmenschwelle) comprise both lateral , longitudinal members in single monolithic concrete casting. system in use in austria; in austrian system track fastened @ 4 corners of frame, , supported midway along frame. adjacent frame ties butted close each other. advantages of system on conventional cross increased support of track. in addition, construction methods used type of track similar used conventional track.


ladder track

in ladder track ties laid parallel rails , several meters long. structure similar brunel s baulk track; these longitudinal ties can used ballast, or elastomer supports on solid non-ballasted support.








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