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A concrete sleeper (British English) ... Here the sleepers are extra heavy, about 250 kg, and may include gauge widening with transitional gauge widening. [10]
They were installed as an alternative to wooden sleepers, on a bridge where concrete sleepers would have been too heavy. Although it was the first instance of plastic sleepers being installed on mainline track in the country, they have previously been used on narrow-gauge railways. [25] Ties may also be made from fiberglass. [26]
Extra heavy concrete sleepers [10] 87.8 m (288 ft 11 ⁄ 16 in) North American rail network: 1,435 mm (4 ft 8 + 1 ⁄ 2 in) Absolute minimum radius; not on lines for general service 85 m (279 ft) Windberg Railway (de:Windbergbahn) 1,435 mm (4 ft 8 + 1 ⁄ 2 in) (between Freital-Birkigt and Dresden-Gittersee) - restrictions to wheelbase 80 m ...
When concrete sleepers are used, a plastic or rubber pad is usually placed between the rail and the tie plate. Rail is usually attached to the sleeper with resilient fastenings, although cut spikes are widely used in North America. For much of the 20th century, rail track used softwood timber sleepers and jointed rails, and a considerable ...
The sleepers are laid on the gravel bed where the panel track was. The sleeper train leaves the worksite loaded with sections of panel track. The sleepers, sometimes known as bi-bloc sleepers, are U41 twin block reinforced concrete, 2.4 m (7 ft 10 in.) wide, and weigh 245 kg (540 lb
This mesmerizing machine drives along train tracks replacing those concrete beams holding up the tracks
As well as being faster, more accurate, more efficient and less labour-intensive, tamping machines are essential for the use of concrete sleepers since they are too heavy (usually over 250 kg or 550 lb) to be lifted by hand. At its most basic, a tamping machine only packs the ballast.
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