Types
Concrete sleepers can be of one piece of uniform dimensions, or of variable dimensions. Concrete sleepers can also consist of two separate blocks connected by a steel tie rod. Exceptionally, the concrete can be poured as two separate longitudinal slabs as has been used in Namibia.
Slab track consists of a continuous concrete roadbed without division into separate sleepers, and these are most often used in tunnels.
Austrak has developed a concrete Timber Replacement Sleeper that can be inter-dispersed with timber sleepers. These sleepers have a similar profile to the timber but have the benefits of concrete - especially when it comes to holding gauge.
Read more about this topic: Concrete Sleeper
Famous quotes containing the word types:
“He types his laboured column—weary drudge!
Senile fudge and solemn:
Spare, editor, to condemn
These dry leaves of his autumn.”
—Robertson Davies (b. 1913)
“As for types like my own, obscurely motivated by the conviction that our existence was worthless if we didn’t make a turning point of it, we were assigned to the humanities, to poetry, philosophy, painting—the nursery games of humankind, which had to be left behind when the age of science began. The humanities would be called upon to choose a wallpaper for the crypt, as the end drew near.”
—Saul Bellow (b. 1915)
“The American man is a very simple and cheap mechanism. The American woman I find a complicated and expensive one. Contrasts of feminine types are possible. I am not absolutely sure that there is more than one American man.”
—Henry Brooks Adams (1838–1918)