DEFINITIONS
VERTICAL LIFT: The lifting of a sin-
gle plate or member in which the lifting
force exerted by the rigging is directly
above and in line with the lifting shackle
as shown in the illustration below.
VERTICAL TURN/LIFT: A vertical
turn/lift clamp is a vertical lifting clamp
specifically intended to turn a single
plate or member thru a ninety degree
(90°) arc and back to vertical thru the
same ninety degree (90°) arc or from
horizontal to vertical to horizontal thru a
one hundred and eighty degree (180°)
arc. Refer to Application Section of
specific Turn/Lift clamps for further
detail. During the turning operation the
edge of the plate opposite the edge to
which the clamp is attached should al-
ways be in contact with a supporting
surface such as a factory floor and the
load on the clamp not exceed one half
rated capacity of clamp—refer to illus-
trations shown below.
HORIZONTAL LIFT: Clamps (used
in pairs or multiples) are attached to the
side edges of a plate or bundle of plates
positioned horizontally to the floor
level. The rigging attached to clamps is
generally multi-legged slings with the
connecting point of the slings being
approximately centered between the
distance separating the clamps. Refer
to illustrations shown below.
WARN-
ING: The capacity of all horizontal
clamps is based on a sling angle of
sixty degrees (60°). See illustration
below. Sling angles less than sixty
degrees (60°) increase the load ex-
erted on the clamps, Never exceed
the rated capacity of a single clamp.
STEEL PLATES: Unless otherwise
specified, lifting clamps are manufac-
tured to handle hot-rolled steel plates
whose Brinell Hardness does not ex-
ceed 300.
WARNING: Do not lift
plates with coatings or mill scale that
prevent the gripping surfaces of the
clamp from making positive contact
with the base metal.
For applications not covered by the
above information, secure written rec-
ommendations from RENFROE.
F I N I S H E D A N D P O L I S H E D
PLATES: Steel plates in this category
have other than hot-rolled surfaces such
as stainless steel, etc., are generally
handled using non-marring clamps in-
corporating smooth gripping surfaces.
WARNING: For applications using
clamps with serrated gripping sur-
Summary of Contents for DWS
Page 4: ......
