For this reason, DSI recommends that wedges for strand anchors, in which the free stressing length remains unbonded, be seated at the highest possible force (0.8 f_pu). Subsequent adjustment in anchor force should be made by adding or removing shims. Using this technique, the wedge teeth will remain securely embedded in the strand. This is particularly important in applications where anchor load is likely to increase with time due to superposition of external loads or anticipated seismic activity.