Vestil HPC Series, Use And Maintenance Manual

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Table of Contents Rev. 3/19/2021 HPC MANUAL
Table of Contents Copyright 2021 Vestil Manufacturing Page 6 of 9
STEP 3: The edge of the sheet must contact the back of the mouth of
each clamp. HPC series clamps are non-locking. Constant tension
must be applied to the grippers of all clamps for the material to be
securely held. Do not relieve tension until the material is fully
supported by your work surface or the ground.
DO NOT attempt a vertical lift. Only lift horizontally.
Adjust 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 6: The sheet material must not flex while it is suspended. Material flexion can disrupt the grip of clamps on
the material.
STEP 7: Lift the sheet to an ergonomically comfortable height. Steady the sheet by lightly grasping one of the
side edges and the trailing edge. Do not apply weight to the sheet material. Do not touch any of the clamps. Do
not touch the rigging. Carefully move the sheet to the work location.
LIFTING RULES
a) Regularly review and apply all SAFETY INSTRUCTIONS from p. 2-3, as well as the Operation section of the
applicable chapter of ASME B30.20.
b) NEVER lift material over yourself or other persons. Make sure that all persons have cleared the area before
lifting and moving material.
c) Stand at arm’s length to the side of the material.
d) If you cannot adequately control the sheet by yourself, ask someone to help you. The second person should
grasp the opposite side edge and the trailing edge of the sheet. Keep feet out from underneath the load.
e) Keep the load level. Watch the sheet while moving it and proceed carefully. If your hoist is moved by a
motorized trolley, allow the trolley to provide all movement.
STEP 8: Make sure that the sheet is not swinging or rotating, then slowly lower the sheet to the ground or work
surface. If you cannot control BOTH the clamp and sheet material without difficulty, ask someone to help
you .
STEP 9: Disengage the clamps. There must be adequate slack in the rigging for the mouths of the clamps to
open. Pull the clamps off of the sheet.
Edge of the sheet
contacts back of
clamp mouth.
STEP 4: Slightly elevate the
sheet of material. The sheet
must balance and must not
rotate. There must be no
side load applied to any
clamp. The gripper arm
must not be deflected any
more than 15° from vertical.
If deflection exceeds 15°,
adjust rigging to reduce
deflection. Do not lift or
move the sheet if deflection
cannot be brought within 0°-
15°.
STEP 5: Confirm that the sheet balances when suspended.
Raise the load just
a few inches
. The sheet must be level
(balanced) widthwise and lengthwise. If the sheet is not
level, return it to the ground. Reposition clamps as
necessary to achieve balance. Raise the sheet again to see
if it is now balanced. DO NOT proceed to the next step until
the load is properly balanced. Use other lifting devices to
raise and move the sheet if it cannot be balanced.
HORIZONTAL
VERTICAL
DEFLECTION
MUST NOT
EXCEED 15°
ON EITHER
SIDE OF
VERTICAL
Widthwise side view Lengthwise side view
Level line VERTICAL