Steel sleepers can be installed with other sleeper types to prolong track life, including turnouts. The steel sleepers are cut to length, the ends is pressed in a forging die. Timber sleeper. Steel Sleepers. Rails are fixed to sleepers by different types of fixtures and fastenings The from CIVIL ENGI 4411 at Sri Lanka Institute of Information Technology Gauge widening for curves less than 200 m radius is not required for steel sleepers. Intrastate and Light Weight Lines steel sleepers may be used in curves of less than 240 m radius but a reduced total life would be expected. Running of the train is not smooth when this type of sleepers is used. How to Fix Railway Sleepers? To prevent creep in rails, the steel sleepers are fixed with rails by clips, bolts and A. one key B. two keys C. three keys D. four keys. Timber (wooden) sleeper, it is a kind of wooden sleeper. Transverse sleepers introduced in 1835 and since then they are universally used. On the other hands, the timber sleepers hold the steel tracks at … The low profile design is easy to handle, stack and transport by road or rail. They link the rails endwise and fix the rails either on chairs fixed to sleepers or directly on to the sleepers. 2. The elastic rail clips can be fixed on wooden, steel, cast iron, and concrete sleepers with the help of a base plate and some other ancillary fittings. Our steel sleepers are the most advanced in the world providing lower installation and maintenance costs and more efficient logistics. Minimum composite sleeper index for wooden sleepers used in cross-overs, is, 68. Image of close, track, train - 119510748 Hook bolts. 2. COPYRIGHT © 2021 by grabSTUDY. Alternatively, timber sleepers may continue to be used at joints. If derailment is happened, they damaged very badly and not suitable for re using. Steel sleepers are highly economical as maintenance costs are significantly lower than concrete, and old ballast can remain in place reducing new ballast requirements. Generally, the timber sleepers lay on the ballasts, and the steel rails are fixed on these railway timber sleepers so that ensuring the safety of the train. They are much useful for heavy loads and high speeds, They have long life of 10-12 years depending upon the climate, condition, rain, intensity, nature of traffic, quality of wood etc, Good insulators and hence good for track circuited railway tracks, Suitable for salty regions and coastal areas, They are not badly damaged in case of derailment, Liable to be attacked by vermin so, they must be properly treated before use, Free from decay and are not attacked by vermins, Connection between rail and sleeper is stronger, Connection between rail and sleeper is simple, More attention is not required after laying, Liable to corrosion by moisture and should not because in salty regions, Good insulators and hence cannot be used in track circuited regions, Cannot be used for all sections of rails and gauges, Should not be laid with any other types of ballast except store, Way gauge is obtained if the keys are over driven, Having good shock absorber as there is not cushion between rail foot and ballast, High scrape value as they can be remolded, They are prone to corrosion and cannot be used in salty formations and coastal areas, Not suitable for track circuited portions of railways, Difficult to maintain the gauge as the two pots are independent, Require a large number of fastening materials, Difficult to handle and may be easily damaged, They can be produced on large quantities locally by installing a plant, Heavier than all other types thus giving better lateral stability to the track, Good insulators and thus suitable for use in track circuited lines, Free from attacks of vermin and decay, suitable for all types of soils, Initial cost is high but proves to be economical in long run, Effectively and strongly hold the track to gauge, Difficult to be manufactured in different sizes thus cannot be used in bridges and crossing, Can be damaged easily while loading and unloading. A joint sleeper of cast iron known as rail Free Duplex sleepers has been use as a rail joints in conjunction with it. Report. The amount of sleepers that set per kilometer of the rail line is decided by the railway volume and running speed. Timber sleeper Railroad steel rail and railway sleeper are commonly used on the railway lines, belongs to the key structure of railway track. Workspace. In general, the timber sleepers lay on the ballasts, and the steel rails are fixed on these railway timber sleepers so that ensuring the safety of the train. View all comments. On sleepers, the rails are supported and fixed, to transfer the loads. Our range of sleepers accommodates vertical and inclined vignole rails and 95RBH bullhead rails. Special steel sleepers are available for use at joints on lines with 60 lb/yd (30 kg/m) rail. Hook bolts are used for fixing timber sleepers to bridge girders. The relative advantages and disadvantages are given below. Advantages of Wooden Sleepers They are cheap and easy to manufacture They are easy to handle without damage They are more suitable for all types of ballast It exerts a toe load of 710 kg for a nominal deflection of 11.4 mm. Ultrasonic Machining Process, Working Principles & Advantages, Electrical Discharge Machine (EDM) Types, Advantages and disadvantages, Machining Operation and Types of Machining Tools, Milling Machine Definition, Process & Types, Railway Sleepers Definition, Characteristics, Treatment, What is Rails, Definition & Types of Rails. -- Loose jaws, keys & Liners for re using, Screw Spike, fittings plate. More efficient logistics forging die ] 0 Comments slabs of stones or pieces of woods parallel! Various types of fastening have been used over the years about in 1914 but are common since.. { } [ + ] { } [ + ] { } [ + ] { [! Ballast which is provided as bed for sleepers stones or pieces of woods placed parallel and. 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