Specimen SL was located at the opposite end of specimen
CT and had the same quantity of end-region reinforcement.
Of the 52 strands in SL, 23 were partially shielded using
plastic sheathing for 5 ft (1.5 m) from the end of the beam.
This moved the transfer length for the shielded strands
away from the end and reduced the tensile stresses in SL
that affected web-splitting cracks.