Table of Contents
Advertisement
Table of Contents
The Instructions provided in this manual are meant to supplement the recommendations of ASME B30.20.
Only trained, qualified persons should use the plate clamp.
STEP 1: Perform an EVERY LIFT INSPECTION as described in the
this manual (p. 9). If the clamp is in
STEP 2: Connect the clamp to the
hoisting device. Only connect the
clamp to a safety hook—hook with a
latch
that
automatically
prevent accidental detachment from
the hoist.
STEP 3: Unlock the clamp by rotating the latch lever clockwise (see photo 1). Move the hoist above the sheet
material. The sheet must balance when lifted, so position the clamp above the center of the sheet. The center of
the sheet is identified with a dashed line in photo 2. NOTE: The sheet must weigh AT LEAST as much as the
MINIMUM UNIFORM PLATE WEIGHT
The plate thickness must be at least 25% of the maximum jaw opening. See SPECIFICATIONS, dimension A on
p. 2. Using the clamp to only lift sheets of the same thickness causes wear in a specific region of the gripper. The
gripper has to be replaced sooner as a result.
1
DO NOT attempt a horizontal lift.
Only lift vertically. Make horizontal adjustments to
the position of the clamp by moving the hoist. DO
NOT push or pull the clamp so that the hoist
chain/rope is not vertical. This is important because
any deflection of the chain/rope from straight up-
and-down will cause the load to swing when lifted. A
swinging load may cause serious personal injuries
STEP 4: Engage the sheet with the clamp. Press the clamp onto the top edge of the sheet. The top edge of the
sheet must touch the back of the clamp mouth (photos 4a & 4b). Lock the clamp by rotating the latch lever
counterclockwise.
3
STEP 5: Confirm that the sheet balances when suspended. Raise the load a few inches above the ground or
other supporting surface (see photo 5). The material is balanced if the top edge is substantially level. It is not level
is one side is lower than the other side). If improperly balanced, return the sheet to the ground or other supporting
surface and immobilize it. Reposition the clamp to improve balance by moving the clamp slightly towards the end
that hung lower during the test; then raise the object again to see if it is balanced. DO NOT proceed to the next
Table of Contents
Rev. 3/12/2021
SATISFACTORY
CONDITION, connect the clamp to a hoist.
closes—to
(MUPW) of your clamp. MUPW figures for all models are provided on p. 4.
2
Gripper (8) must contact pad (2). If
they do not, adjust the position of
the gripper until contact is made.
4a
The top of the sheet contacts
the back of the clamp mouth.
Copyright 2021 Vestil Manufacturing
INSPECTIONS & MAINTENANCE
2
8
Proper Vertical Lift
EPC MANUAL
section of
Hook with
automatically
closing latch
Improper Horizontal Lift
4b
Latch
the
clamp
Page 6 of 11
Advertisement
Table of Contents
