COUPLED SLEEPER

PROBLEM TO BE SOLVED: To provide a coupled sleeper having a function required as a turnout sleeper without greatly increasing its weight by skillfully combining a concrete block sleeper with an iron sleeper. SOLUTION: The coupled sleeper comprises the PC sleeper and the iron sleeper 1 fastened to the PC sleeper. The iron sleeper 1 consists of a first structural member 2 and a second structural member 3, and the first structural member 2 is fastened to the PC sleeper via the second structural member 3. The first structural member 2 has a plane upper side portion 4 and a plane lower side portion 5, and it has an approximately H-shaped cross section with a vertical side portion 6 continuously formed in the longitudinal direction of the sleeper for connecting cross central portions of an upper side and a lower side together. The second structural member 3 is open at its lower and front face sides, and its upper face side, left side face, right side face and rear face side are blocked with an upper face member 8, a left side face member 9, a right side face member 10 and a rear face member 11, respectively. The rear face member 11 of the second structural member 3 is connected to the approximately H-shaped end face of the first structural member 2. COPYRIGHT: (C)2005,JPO&NCIPI