Renfroe LPA Installation guide

WARNING:
Before putting tool in service,
take to your immediate
supervisor.
Model LPA Clamp
Application, Operation and Maintenance Manual
OMLPA115
RENFROE
Model LPA

This Operator’s Manual covers the Application, Operation
and Maintenance of this RENFROE product. Operator’s
Manuals for other current RENFROE products are available
upon request. Direct requests to J.C. Renfroe & Sons Jack-
sonville, Florida 32201.
Operators
Manual
J.C. RENFROE & SONS
of Jacksonville, Florida, has
been an international leader
in the manufacture and mar-
keting of Lifting Clamps for
over fifty years. RENFROE
products are manufactured
in Jacksonville, Florida. A
worldwide network of stock-
ing distributors provides a
readily available source of
supply and service.
J.C. RENFROE & SONS
Jacksonville, Florida 32201
Telephone: [phone]
Toll Free: 1-800-874-8454
Fax: [phone]
www.jcrenfroe.com
Copyright © 2001 J.C. Renfroe & Sons

THIS PUBLICATION SUPERSEDES ALL
PREVIOUSLY PUBLISHED AND/OR DISTRIBUTED
INFORMATION BY MANUFACTURER AND/OR ITS
DISTRIBUTORS WITH RESPECT TO APPLICABLE
RENFROE PRODUCTS AND SUBJECT MATTER
DESCRIBED OR CONTAINED HEREIN.
NOTICE OF EXCLUSION OF WARRANTY
RENFROE HAS HEREIN SET FORTH IN
CONSPICUOUS LANGUAGE AN EXCLUSION
OF ANY WARRANTY EITHER EXPRESSED OR
IMPLIED, WHICH IS NOT SPECIFICALLY AND
PARTICULARLY CONTAINED HEREIN.
PLEASE REFER TO THAT STATEMENT FOR
REPRESENTATIONS AND WARRANTIES OF
PRODUCTS MANUFACTURED BY J.C.
RENFROE & SONS
WARNING:
Prior to selection, operation and/or maintenance
of RENFROE products, read and understand the infor-
mation provided in this manual.
The understanding and use of the Definitions are
important in determining the limitations and proper appli-
cation of RENFROE products.
Failure to review and utilize recommended appli-
cations, operation and maintenance instructions may
result in serious injury to operator and others.

OPERATING AIDS
(DO’S AND DON’TS)
1. DO read and understand the Operators Manual before using the clamp
2. DO Consult Operator’s Manual or RENFROE when in doubt.
3. DON’T Lift over workmen DON’T lift over Safety Areas or personnel.
4. Do attend a factory training class for establishing proper use of Renfroe
Products.
5. DO Lock clamp closed before lifting load. DON’T lift with lock in open or
“Lock Open” position.
6. DON’T Use a connection that may release the clamp.
7. DON’T attach clamp directly to crane hook. DO use a flexible connection
between crane and clamp shackle. DON’T use heavy flexible connection.
8. DO use correct clamp for job. DON’T use large capacity clamps to lift light
loads.
9. DO Use an adequate number of clamps to balance load. DON’T lift loads
that are not balanced.
10. DO Use clamps within their rated capacity. DON’T overload clamps
11. DO Inspect clamp before each lift, follow inspection and maintenance in-
structions outlined in this manual and use RENFROE replacement parts to
assure proper operation of the clamp
12. DON’T Use clamp that has been overloaded. DO refer to pre-lift inspection
in Operators Manual
13. DON’T Side load with a straight shackle clamp. DON’T lift from side with
vertical clamp
14. DON’T Misuse. DON’T lift plate from bottom of plate stack.
15. DON’T Rush. DON’T lift more than one plate at a time with a vertical clamp.
16. DON’T Improvise. Always use correct clamp for job. DON’T lift plate hori-
zontally with a vertical lift only clamp.
17. DON’T Alter clamp. DON’T grind, weld or modify the clamp in any manner.

DEFINITIONS
VERTICAL LIFT: The lifting of a single
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 spe-
cifically intended to turn a single plate or
member thru a ninety degree (90°) arc
and back to vertical thru the same nine-
ty 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 always be in contact
with a supporting surface such as a fac-
tory floor and the load on the clamp not
exceed one half rated capacity of
clamp—refer to illustrations shown be-
low.
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.
FINISHED AND POLISHED PLATES:
Steel plates in this category have other
than hot-rolled surfaces such as stain-
less steel, etc., are generally handled
using non-marring clamps incorporat-
ing smooth gripping surfaces.
STRUCTURAL MEMBERS—
FABRICATED SECTIONS: Unless oth-
erwise specified, clamps described as
capable of handling structural mem-
bers and fabricated sections are limited
to hot-rolled steel whose Brinell Hard-
ness does not exceed 300.
WARNING: For applications not cov-
ered by the above information, se-
cure written recommendations from
RENFROE.

RATED CAPACITY: The rated capaci-
ty of a RENFROE product is based on
the product being in “new or as new”
condition and represents the maximum
load the product is to be subjected to
when utilized in the manner described
in this manual. Wear, misuse, abuse
and other factors relating to usage may
reduce the rated capacity. Shock load-
ing and the factors listed must be taken
into consideration when selecting a
RENFROE product for a given applica-
tion.
PLATE THICKNESS: The minimum
and maximum plate thickness a clamp
specified for handling plates is capable
of lifting.
WARNING: Never use a clamp for
lifting a plate where the plate thick-
ness is less than or greater than the
minimum and maximum stenciled
on the clamp.
JAW OPENING: The minimum and
maximum thickness of a member of
clamp specified as having a JAW
OPENING is capable of handling
WARNING: Never use a clamp on a
member whose thickness is less
than or greater than the range of jaw
opening stenciled on the clamp.
OPERATING TEMPERATURES: Un-
less specified under the Application
Section of the individual model, the
approved operating temperature of
RENFROE clamps is from zero de-
grees Fahrenheit (-18 Celsius) to a
maximum of 200 degrees Fahrenheit
(+93 degrees Celsius). The minimum
and maximum temperatures apply to
both ambient and the material being
handled by the clamp.
WARNING: Secure written authori-
zation from RENFROE before using
clamps in temperatures other than
shown.
“LOCK OPEN-LOCK CLOSED” - an
over-center spring loaded mechanism
in which the spring exerts a force on
the gripping cam when the lock handle
is moved to the “Lock Closed” position.
When the handle is moved to the “Lock
Open” the gripping cam is maintained
in the retracted position for ease in in-
stalling the clamp on a plate or mem-
ber. Refer to the Operation Section of
specific models of the “Lock Open-
Lock Closed” clamps for additional de-
tails. Typical “Lock Open-Lock Closed”
clamps are Models FRD, R, S, SD,
SEA, TL, TLA and the L-Series.
WARNING: A pointing out and notice
of danger. The purpose of a
“WARNING” is to apprise the operator
and all other affected persons of the
existence of danger of which he should
be but may not be aware and to enable
the operator to protect himself and oth-
ers where applicable against such dan-
ger. An attempt is made herein to warn
against reasonable and reasonably
foreseeable danger in the proper use
and possible reasonable misuse of
RENFROE products described in this
manual.

DESIGNATED PERSON — A person
selected by the employer or the em-
ployer’s representative as being com-
petent to perform those specific duties.
QUALIFIED PERSON — A person
who, by possession of a recognized
degree in an applicable field or certifi-
cate of professional standing, or who,
by extensive knowledge, training, and
experience, has successfully demon-
strated the ability to solve problems
relating to the subject matter at hand.

Application LPA
The model LPA has a lock open and lock closed feature built into its
design. The LPA has an auxiliary lock. The LPA clamp is recommend-
ed for turning of a single steel plate from horizontal to vertical to hori-
zontal through a hundred and eighty degree arc. Refer to Illustration A.
The Auxiliary lock prevents the lock handle from moving from the
“Lock Closed” position until the auxiliary lock button is manually de-
pressed. The “Lock Open” “Lock Closed” feature facilitate attaching
and removing the clamp from the plate. Refer to Definition Pages for
explanation of “Lock Open” “Lock Closed” clamp. A pivoting shackle is
included on the LPA clamp.
Refer to Illustration B.
WARNING: Refer to Load Chart showing de-rating of rated capaci-
ty based on angle of side loading.
For identification of component parts, refer to exploded view of clamp
located at the end of the Maintenance Section.
Model LPA

WARNING: When turning a plate from horizontal to vertical, the
operator must position the clamp at the start of the turning opera-
tion so that the lock handle is on the topside of the plate when the
plate is in the horizontal position. It should be noted at the finish
of a 180 degree turn that the lock handle will be on the underside
of the plate and therefore sufficient clearance under the plate
should be allowed for the lock to be disengaged. Refer to the sec-
tions on Operation and Maintenance for the approved procedures
in the Operation and Maintenance of this product.
Illustration A
Illustration B