Patent ID: 7055288

Claim:
A pre-stressing sheath for covering a section of reinforcing strand in a pre-stressed concrete beam such that any potential strand tension transmitted to the beam is nullified by allowing the strand to slide freely within the pre-stressing sheath, said sheath comprising: a) a first hollow cylindrical sheath section having a first longitudinal slit that allows said first sheath section to be opened and placed over the strand, said first hollow cylindrical sheath including a first outwardly projecting ridge opposite said first slit; and b) a second hollow cylindrical sheath section having a second longitudinal slit that allows said second sheath section to be opened and placed over said first sheath section, said second hollow cylindrical sheath section including a second outwardly projecting ridge opposite said second slit, said second sheath section being over said first sheath section with said first ridge projecting through said second slit and said second ridge being opposite said first ridge, said first and second sheath sections being identical and interchangeable.