This standard specifies the design requirements, loading criteria, and permissible stresses for pre-tensioned prestressed concrete sleepers used in broad gauge railway tracks. It provides detailed methodologies for calculating bending moments at the rail seat and center sections under dynamic train loads.
Provides guidelines for the structural design of prestressed concrete sleepers used in broad gauge railway tracks.
Quick Reference Values
broad gauge width1676 mm
minimum concrete gradeM55
high tensile wire diameter3 mm or 5 mm
Key Formulas
Total Loss of Prestress = Loss due to elastic shortening + creep of concrete + shrinkage of concrete + relaxation of steel
Practical Notes
Strict quality control during manufacturing is essential to achieve the required transmission length for pre-tensioned wires.
Dynamic impact factors (dynamic augment) must be accurately applied to static wheel loads to prevent fatigue failure.
High early strength cement is highly recommended to expedite the transfer of prestress and optimize formwork turnaround.