Struno -concrete sleepers and half -soda

Struno -concrete sleepers and half -soda have pre -tense reinforcement in the form of a cold, high -strength wire. In places of attachment of rails, sleepers have a thickening. The attachment of the rails is carried out by crutches clogged into inserts, from a beech, birch or oak, which are impregnated with creosote and laid in concrete during concrete.