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Even such an outrigger system is not without its complications, as tracks that are no longer perfectly parallel — common on sections of abandoned track — can result in derailment. Additional guide rollers can help alleviate this problem at the expense of greater weight.
A guide rail is a system designed to guide vehicles back to the roadway and away from potentially hazardous situations. [4] There is no legal distinction between a guide rail and a guard rail . According to the US Federal Highway Administration , the terms guardrail and guiderail are synonymous.
Tracks can also ride off their guide wheels, idlers or sprockets, which can cause them to jam or to come completely off the guide system (this is called a "thrown" track). Jammed tracks may become so tight that the track may need to be broken before a repair is possible, which requires either explosives or special tools.
The rollers also have safety locks that prevent the doors from jumping off the tracks. Additional devices include soft-closers and dampeners, which make it easier to close the door gently. A popular top-hung sliding door type is the barn door , inspired from countryside barns , in modern homes of Scandinavian styles.
The railway track or permanent way is the elements of railway lines: generally the pairs of rails typically laid on the sleepers or ties embedded in ballast, intended to carry the ordinary trains of a railway. It is described as a permanent way because, in the earlier days of railway construction, contractors often laid a temporary track to ...
Roller coaster wheels. Roller coaster trains have wheels that run on the sides (side friction or guide wheels) and underneath the track (upstop, underfriction, or underlocking wheels) as well as on top of it (road or running wheels); these lock the train to the tracks and prevent it from jumping the track. The side wheels can be mounted on the ...
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