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. A joint sleeper of cast iron known as rail Free Duplex sleepers has been use as a rail joints in conjunction with it. They are not suitable for all types of ballast which is provided as bed for sleepers. In extrusion the sleeper is formed continuously by pressing heated plastic through a die. So let us check it out some points of recycling to know more about recycling materials. Producing one ton of steel requires 40% of the energy. 14. Disadvantages of Structural Steel Structures. Steel sleepers can … REQUEST A BID. Moreover, steel is a good conductor of heat, ignites materials in contact and often causes fires, which rapidly spread to other sections of a building. 12. 02. – Creosote treated sleepers can be hard to recycle, making them more expensive. These sleepers can be supplied with or without cant, with holes or with Welded arrangement of Base plates, shoulders etc. is the main and most used material for sleepers. Advantages of Wooden Sleepers They are cheap and easy to manufacture They are easy to handle without damage They … The disadvantage of steel sleepers are (i) liable to corrode, (ii) unsuitable for track-circuited areas, (iii) liable to become centre-bound because of slopes at the two ends, (iv) develops cracks on rail seats during service, and (v) design is rail specific. Timber sleepers are workable, easy to handle, easy to replace and needs no complicated assembly equipment. The service life of steel sleepers is governed by fatigue that is not apparent until the sleeper has started to fail. Two-block concrete sleeper for MG yards. Steel structures are also provided with fireproof coatings i.e. The manufacturing of sleepers is a simple process. Plastic railway sleeper. The life of timber sleepers depends upon their ability to resist a) Wearb) Decayc) Attack by vermind) All the above View Answer The following types of Steel Sleepers are as follows, Key Type The rail track structure is composed of several main parts, which are steel rails, rail sleepers, track beds, and rail fastening parts.It is defined that sleeper is a device that bears the pressure of the rails and transfers it to the track bed evenly. 10. Steel Sleepers. 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The main areas of creosote treated wood are for railway sleepers, ... sleeper. Advantages Most steels must be painted at regular intervals because if they are freely exposed to air they get corrode. – Service life of wooden sleeper is shorter (10-30 years). They also have good life span. Steel sleepers have the following main advantages/disadvantages over wooden sleepers. It can be used only for rails for which it is manufactured 4. 15. The typical steel column occupies 75% less floor space than an equivalent concrete column. Structural steel structures can withstand external pressures such as earthquakes, thunderstorms, and cyclones. Additionally, because it can’t take the same stress as steel, you will have to use more of it; meaning more costs. The main advantage of the timber is their adaptability as it can be tted with all types railway track. Answer: Option D Answer: Option A Practice Test: Question Set - 02 1. for fixing of rails as per the customer’s requirements. Answer: Option C steel sleepers in 80lb… These composite sleepers have the same damping characteristics as timber sleepers, which makes them suitable for 1:1 replacement of wood. April 2016. 1234567891011121314151617181920Next, © 2012-2021 by GeekMCQ™ Technologies. An untreated oak sleeper has a life span of roughly 10 years. Gib and cotters for connecting pot sleepers are so casted that by interchanging them gauge is slackened by, Plate sleepers consist of a plate of dimensions. expanded mineral coatings. Main disadvantage of steel sleepers, is : A. it gets rusted quickly B. its lugs some times get broken C. its lugs some times get split D. all the above. Some Examples of recycling materials are as follows. Practice Test: Question Set - 07 1. Advantages of Steel Sleepers. Steel sleepers are highly economical as maintenance costs are significantly lower than concrete, and old ballast can remain in place reducing new ballast requirements. They can be fitted with all types of railway track. Answer: Option C Which of the following is a cast iron sleeper? There are three ways of removing and replacing a steel sleeper. Steel is widely used in different sectors. Hence they are universally used. This makes it susceptible to corrosion. The main disadvantage of steel sleepers is: A. that they get rusted very quickly: B. that their lugs sometimes get cracked: C. that their lugs sometimes get broken: D. all of these View Answer Workspace Report Discuss in Forum. Homepage/; Uncategorized/; disadvantages of metals The ends of the rolled section are flattened out in the shape of a spade to retain the ballast. Following are some of the disadvantages of steel structures. Steel sleepers seem more of a rarity, but they have been around for a long time. If derailment is happened, they damaged very badly and not suitable for re using. 1.4.2 Steel sleeper Classic steel sleeper is out of production today. For a Broad Gauge route with (M + 7) sleeper density, number of sleepers per rail length is (A) 18 (B) 19 (C) 20 ... and at the ends of the sleepers, to prevent the sleepers from moving. But the inventions of … 13. 2.1. It is difficult to maintain gauge in case of wooden sleepers; Scrap value is negligible; Their useful life is short about 12 to 15 years. The main disadvantage in using timber for sleepers is their susceptibility to mechanical and biological degradation leading to failure [7]. Answer: Option C concrete sleepers and hardwood timber sleepers treated with preservative are the main alternative materials (1 1 In Australia, the ready availability of relatively durable hardwood has tended to inhibit technological development of other sleeper materials. Most of the tracks lays with the metal sleepers. The main problem arrising with the early use of steel sleepers was that they are hollow underneath and therefore were difficult to support on the ballast, especially when jacking and packing. Material which can be recycled are : Plastic drink bottels, chipboard, newspaper, corrugated cardboard, glass bottels, beverage cans, magazine, plastic, aluminium, paper, glass, trash etc., Find out more on advantages and … Watch Queue Queue Their susceptibility to mechanical and biological degradation leading to failure is their major disadvantage. It is liable to corrosion. Steel sleepers are formed from pressed steel and are trough-shaped in section. Answer: Option B Hi all. New sleepers are tanalised and should last for many years. Practice Test: Question Set - 02 1. More Expensive Than Steel. Timber Timber sleepers have a long history of effective and reliable per-formance in the railway environment [25]. The main advantage of the timber is their adaptability as it can be fitted with all types of railway track. Steel sleepers have the following main advantages/disadvantages over wooden sleepers. Rail wood sleeper advantages Rail Track Structure. Practice Test: Question Set - 01 1. The proportion of carbon is the main influencing factor for the weight. Previous Asphalt shingles are very popular, but just in North America mostly. In Queensland, fungal decay is the most predominant form of timber sleeper failure [9]. A disadvantage of traditional track ... to prevent the sleepers from moving. Wooden sleepers. Both main types of failure of timber sleepers are shown in … Answer: Option B The rail track structure is composed of several main parts, which are steel rails, rail sleepers, track beds, and rail fastening parts.It is defined that sleeper is a device that bears the pressure of the rails and transfers it to the track bed evenly. 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