Note that tensioning a strand anchor with no free-length can present some real problems with properly locking off the wedges at the desired force. Normal wedge seating ussually results in a minimum loss of steel elongation of 0.5 inches. If you do not have a minimum (real)unbonded length of 15...
The Post-Tensioning Institute's (PTI)Reccomemmdations for Prestressed Rock and Soil Anchors are the most commonly accepted standards for anchors in the United States. These recommendations call for a minimum unbonded length of 15' (for strand anchors), and 10' (for Threadbar anchors). The...
