WOODEN SLEEPER Russian patent published in 2010 - IPC E01B3/10 B27M3/14 

FIELD: construction.

SUBSTANCE: wooden sleeper is made of pressed wood massif, with density of 800 kg/m³, moisture of 10-12%, and two end inserts also made of pressed wood with density of 900-1000 kg/m³, moisture of 10-12%, installed in areas of steel gasket fixation to sleeper and containing distillation residue of sterol rectification in amount of 15-17% from dry wood mass. Value of ultimate strength of inserts when chipped along wood fibres is at least 20 MPa, value of swelling forces across fibres is not more than 10 MPa, height of inserts is at least 30 mm. Forecasted service life of sleeper is 50 years.

EFFECT: invention makes it possible to increase durability of sleeper.

2 dwg, 1 tbl