Model AST

Both the Model AST and ASTL were developed primarily for lifting, turning
and stacking lightweight beams and structural shapes while a constant tension
is applied to the lifting shackle. The horizontal shackle permits a beam to be
lifted with the web in a near horizontal position by placing the clamp on the
load with the shackle positioned over the web, and between the flanges.
With a beam lying in a horizontal position, and the clamp placed with the
shackle overhanging the flange, the beam can be lifted, turned 90 degrees,
and raised in a vertical position. The Model ASTL includes all of the feature
of the Model AST plus a linkage which permits the tool to be removed remotely
by setting the load down with the sling slack, then lifting the crane hook.