Definitions
1. Vertical lift:
The lifting
of a vertical plate or
member in which the
lifting force exerted by
the rigging is evenly
distributed and is direct-
ly above and in line with
the clamp’s lifting shackle. Ths is illustrated above.
2. Vertical turn/lift:
A
vertical turn/lift clamp is
one designed to turn a
single plate or member
from horizontal to vertical
through a 90° arc; or
from horizontal to vertical
to horizontal through a 180° arc.
3. Horizontal lift:
Multiple clamps are attached to the
sides of a horizontal plate. The clamps are attached
to a multi-leg sling centered over the plate. Refer to
illustrations.
The capacity of all horizontal clamps
is based on a sling angle of 60°. See illustration
(right). Sling angles less than 60° increase the
load exerted on the clamps.
Horizontal
clamps are rated in pairs. One
half of the rated capacity is
the maximum allowable load
for one clamp.
4. Finished and polished plates:
Steel plates such as
stainless which have other than hot rolled surfaces
are generally handled with non-marring clamps having
at least one smooth gripping surface. Extra caution
is therefore required.
LIFTING SHACKLE
LIFTING FORCE
CLAMP
PLATE OR
MEMBER
8
WARNING:
WARNING:
