Renfroe SCP Series Installation guide

WARNING:
Before putting tool in service,
take to your immediate
supervisor.
Model SCP/SCPAClamp
Application, Operation and Maintenance Manual
OM 616-SCP/A
RENFROE
Model SCP

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, Inc.,
Jacksonville, Florida 32201.
Operators
Manual
J.C. RENFROE & SONS,
INCORPORATED
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,
INCORPORATED
Jacksonville, Florida 32201
Telephone: [phone]
Toll Free: 1-800-874-8454
Fax: [phone]
www.jcrenfroe.com
Copyright © 2001 J.C. Renfroe & Sons, Inc.

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, INC.
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.
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.
WARNING: The capacity of all hori-
zontal clamps is based on a sling
angle of sixty degrees (60°). See
illustration below. Sling angles less
than sixty degrees (60°) increase the
load exerted 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 con-
tact 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.
WARNING: For applications using
clamps with serrated gripping sur-

faces on finished or polished plates,
secure written recommendations
from RENFROE.
STRUCTURAL MEMBERS—
FABRICATED SECTIONS: Unless
otherwise 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. WARN-
ING: For applications not covered
by the above information, secure
written recommendations from REN-
FROE.
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 thickness is less than or great-
er 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 authorization from
RENFROE before using clamps in
temperatures other than shown.
“HOT LIFTS”: The Model R and S
clamps are available in modifications
that are capable of making lifts where
the temperatures of the member being
lifted exceeds 200 degrees Fahrenheit
(+93 degrees Celsius). Depending on
conditions a lift may exceed 1000 de-
grees Fahrenheit (538 degrees Celsi-
us). The exact application and temper-
atures of the plates to be handled are
critical in selecting the proper model.
WARNING: Secure written instruc-
tions from RENFROE for all hot lift
applications.
LOCKING CLAMPS: Locking clamps
are divided into the categories listed
below. With the exception of the
“Locking Wedge” and “Locking Screw”
type the purpose of the locks are to
facilitate the attaching and removing of
the clamp from the member being han-
dled.
“LOCK CLOSED” - an overcenter
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 unlocked position
the force exerted by the spring is re-
laxed and the gripping cam may be
retracted by pushing the lifting shackle
into body of clamp. Refer to the Oper-
ation Section of specific models of
“Lock Closed” clamps for additional
details. Typical “Lock Closed” clamps
are Models DG, FR and M.
“LOCK OPEN ONLY” - normally used
on “Hot Lift” clamps and consists of a
manually operated “Lock Stop Pin” that
is inserted when gripping cam of clamp
is retracted and removed when clamp
is positioned on the plate. Tag line
may be used to permit operator to re-
move pin from a greater distance from
clamp. Refer to the Operation Section
of specific model of “Lock Open Only”
clamps for additional details. Typical
“Lock Open Only” clamp is the Model
RO.
“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. The Model FRD contains individu-
al “Lock Open” and “Lock Closed”
mechanisms that must be operated
separately. Refer to the Operation
Section of specific models of the “Lock
Open-Lock Closed” clamps for addi-
tional details. Typical “Lock Open-
Lock Closed” clamps are Models FRD,
R, S, SD, SEA, SX, TL, TLA and the J-
Series.
“LOCKING WEDGE” - is a fluted steel
wedge that is driven in place with a
hammer. The body of the wedge is
positioned in a slot in the clamp body
with the fluted edges contacting the
member to which the clamp is being
attached. Refer to Operation Section
of specific models of the “Locking
Wedge” clamps for additional details.
Typical “Locking Wedge” clamps are
Model A1, B1, B2 and PB.
”LOCKING SCREW” - “Lock Screw”
clamps depend on manually adjusting
a screw to hold the gripping surface in
place for lifting and removing the clamp
from member being lifted. Refer to
Operation Section of a specific model
of “Locking Screw” clamps for addition-
al details. Typical “Locking Screw”
clamps are Models AC, ACP, NM, PC,
SCP and SCPA.
NON-LOCKING: “Non-Locking”
clamps have no mechanisms to aid in
attaching or removing clamp from
member being lifted. It is necessary to
have position of clamp maintained on
the member being lifted until a properly
applied force is exerted to the lifting
shackle. Refer to Operation Section of
specific models of the “Non-Locking”
clamps for additional details. Typical
“Non-Locking” clamps are Model AST,
ASTL, BD, HR, HDR and WHSR.
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 reasona-
bly foreseeable danger in the proper
use and possible reasonable misuse of
RENFROE products described in this
manual.

DESIGNATED PERSON — A person se-
lected by the employer or the employer’s
representative as being competent to per-
form those specific duties.
QUALIFIED PERSON — A person who, by
possession of a recognized degree in an
applicable field or certificate of professional
standing, or who, by extensive knowledge,
training, and experience, has successfully
demonstrated the ability to solve problems
relating to the subject matter at hand.

MODEL SCPA
LOCKING SCREW
MODEL SCP
LOCKING SCREW
Application SCP/SCPA
The model “SCP” clamp is capable of handling steel plates from the hor-
izontal through a hundred and eighty degree arc and may be used for
handling plate at rolling and forming machines. Refer to Illustrations
shown below. The adjusting screw is used to adjust clamp for various
thicknesses of material and attach the clamp to members being lifted.
The model “SCPA” has the same capabilities as the “SCP”, except the
“SCP” is limited to 10 degrees side-loading on the shackle. The “SCPA”
incorporates a pivoting shackle permitting 90 degrees side-loading. Re-
fer to Definition Pages for explanation of “Screw Locking” clamp. The
clamp features a spring-loaded pivoting cam jaw that “cams in” when a
load is applied to the lifting shackle.
For identification of component parts, refer to exploded view of clamp
located at the end of the Maintenance Section.

WARNING: Refer to the sections on operation and maintenance for the
approved procedures in the operation and maintenance of this product.

The SCPA can be fitted to a beam for horizontal lifting.
Warning: Do not rig SCPA clamps in the manner shown
above.
OPERATION SCP/SCPA
Step 1.
Before using any RENFROE clamp, refer to the Application Section to confirm
that the operation to be undertaken is an appropriate application for this prod-
uct.

Step 2.
Select appropriate capacity and plate thickness. The model designation, ca-
pacity and plate thickness are stenciled on each clamp.
WARNING: Never exceed rated capacity or use on material whose thick-
ness is not within the range of jaw opening stenciled on clamp. Lift only
one plate on each lift.
Always use a clamp with maximum plate thickness and rated capacity near
equal to the thickness and weight of the plate being lifted.
Step 3.
Inspect clamp before each lift.
WARNING: Do not use if in need of repair.
If in doubt, refer to Maintenance Section for detailed maintenance instructions
and exploded view of the clamp for part identification.
A. Check the clamp to be certain the Identification and warning
tags are present and legible.
B. Do not use the clamp if the tags are missing or illegible
C. Inspect gripping surfaces for wear and defects. Gripping surfaces must
be sharp and free of foreign matter. Screw cup mounted in screw should
turn freely.
D. Screw should turn freely. Inspect for wear and damage.
E. Spring must hold cam jaw in “Centered” position parallel to the screw.
WARNING: Do not use clamp unless spring is in place and is holding
the cam jaw parallel to length of screw.
D. Inspect condition of body for wear and damage, particularly on the inside
of jaw opening.
E. Inspect condition of lifting shackle and pins for wear and damage.
F. Remove any clamp from service in need of repair.
Step 4.
The clamp is a component of the rigging used in the lifting or transporting of
members. It is important to use safe and adequate rigging.
WARNING: Improper or excessively heavy rigging may interfere with
the operation of the clamp and its ability to maintain proper positions on
the member. Never attach crane hook directly to the clamp - always
use a flexible sling between crane hook and clamp.
Step 5.
Position clamp on the plate to be lifted. Do not allow inside of jaw opening to
rest on plate to be lifted. Maintain 1/4” clearance. Refer to Illustration A.

On model “SCP”, position clamp so direction of force applied by crane is in
line with the lifting shackle.
WARNING: On model “SCP” never exceed ten degrees side loading.
Refer to Photographs B, C, D and E.

Step 6.
Tighten screw making certain both gripping surfaces are parallel to the sur-
face of the member being lifted and are not partially on and off the edge of the
plate. Refer to Illustration A, Step 5 and Illustration B.
Using a bar, tighten screw hand tight, then an additional 1/4 turn. Do
not over tighten. Refer to Photograph G and Chart H.
WARNING: Apply required torque on screw, do not over-tighten.
CHART H
Required Torque On Screw For Model “SCP/A/SP” Clamps
Operator Operator Operator
Capacity Operator Force Force In Force In Force In
In In Pounds With Pounds with Pounds With Pounds With
Tons Attached Handle 12” Lever 18” Lever 24” Lever .
1/2 40 21 14 -
1 1/2 40 26 18 -
3 50 34 23 -
6 - 78 52 -
8 - - 83 64
10 - - - 85
15 - - - 144
20 201 151

Step 7.
Commence lift.
WARNING: The operator should position himself away from and fully
clear of the member to be lifted. Do not commence lift until all person-
nel are clear of the area of the lift. Never stand under or near a member
being lifted.
Refer to Photograph J.
Step 8.
To remove clamp - after load is fully supported and at rest in a stable position,
relax lifting force and loosen screw. Lift clamp from plate.
Step 9.
Inspect clamp, remove from service if in need of repair.
WARNING: In the event the stenciling is work and not legible or the tag
containing the model, capacity, and other pertinent information is miss-
ing, do not use the clamp until it has been properly labeled. Renfroe will
replace at not charge.
Inspection Kits are available at no charge by request from a distributor or
RENFROE. Inspection kit contains: Lifting clamp Inspections Report forms,
Inventory and Maintenance Record cards, Danger Tags and monthly Inspec-
tion Stickers.

Maintenance Program for Renfroe Clamps Manufactured from Steel
The severity of service to which the clamp is subjected in the work place
determines the frequency and type of inspection procedure required for
the clamp. The frequency and type of inspection is determined by the
clamp owner. Renfroe acknowledges the ASME B30.20 safety standard
which sets forth minimum inspection requirements for “Below-the-Hook”
lifting devices and the Renfroe Recommended Inspection Schedule
meets and/or exceeds the ASME inspection recommendations.
Before using a clamp operators should be trained by a qualified
person to visually inspect a lifting clamp that will include but not be
limited to the following:
Every lift Inspection:
A visual inspection by the operator before and after each lift
made by the clamp.
A. Check the clamp to be certain the Identification and warn-
ing tags are present and legible.
B. Do not use the clamp if the tags are missing or illegible
C. Inspect gripping surfaces for wear and defects. Gripping surfaces
must be sharp and free of foreign matter. Screw cup mounted in
screw should turn freely.
D. Screw should turn freely. Inspect for wear and damage.
E. Spring must hold cam jaw in “Centered” position parallel to the
screw.
WARNING: Do not use clamp unless spring is in place and is hold-
ing the cam jaw parallel to length of screw.
D. Inspect condition of body for wear and damage, particularly on the
inside of jaw opening.
E. Inspect condition of lifting shackle and pins for wear and damage.
Remove any clamp from service in need of repair.

WARNING: Do not use the clamp if in need of repair.
If, during the every lift inspection, the operator believes the
clamp exhibits excessively worn parts or is damaged, the
clamp should be inspected by a qualified person who will make
a determination as to its fitness to make a lift. At this time the
condition of the clamp should be noted and recorded. After in-
spection by the qualified person it may be decided that a peri-
odic inspection procedure is necessary.
Frequent Inspection:
A visual inspection (see every lift inspection) by an operator or other
designated person timed according to the clamps service class.
Normal Service: monthly
Heavy Service: weekly to monthly
Severe Service: daily to weekly.
If, during the frequent lift inspection, the operator believes the
clamp exhibits excessively worn parts or is damaged the clamp
should be inspected by a qualified person who will make a de-
termination as to its fitness to make a lift. At this time the condi-
tion of the clamp should be noted and recorded. After inspec-
tion by the qualified person it may be decided that a periodic
inspection procedure is necessary.
Periodic Inspection:
A recorded inspection by a qualified person as described in the Periodic
Inspection Procedure below timed according to the clamps service
class.
Normal Service: annual
Heavy Service: semi-annual
Severe Service: quarterly.
If during any inspection a condition is found which leads to a
periodic inspection then the next periodic inspection is due
from the time the clamp is returned to service. For example un-
der a Normal Service schedule, one year from the time the
clamp is returned to service.
Renfroe recommends that a periodic inspection be conducted if
any hazardous condition is found.

Warning: If any hazardous condition is found that may cause
injury to the operator or other personnel then the clamp should
be subjected to a Periodic Inspection by a Qualified Person.
Repair (replacement of worn parts)
During regular maintenance when replacing parts that are
worn a record should be made of the parts replaced. After the
replacement of worn parts clamps need not be load tested.
Repair (replacement of damaged parts)
During a repair in which parts are replaced due to damage a
record should be made of the repair. At this time the clamp
should be marked with the following information as per the
ASME B30.20 requirements:
Name and address of the repairer
Repairer’s unit identification
Clamp weight (if altered)
Rated load (if altered)
ASME BTH-1 Design Category (if altered)
ASME BTH-1 Service Class (if altered)

Model SCP/A Periodic Inspections
Step 1.
Verify the identity of the clamp by checking the I. D. plate on the clamp
body. If the I. D. plate is missing or not legible an RFID chip (Radio
Frequency Identification Device) is embedded in the clamp body or a
clamp component. If the I. D. plate is missing and the RFID chip is un-
available call the Renfroe factory for instructions on returning the
clamp for recertification.
Step 2.
Completely disassemble clamp.
Step 3.
Remove all dirt, grease and other matter that may inhibit proper inspection of
the clamp body or clamp components.
Step 4. BODY
A. Inspect welds for fractures. RENFROE recommends a dye pene-
trant or similar method of detecting indications on the clamp. If an
indication is found it may be necessary to use a magnetic particle,
ultrasonic or similar methods for determining damage to the clamp
or components.
B. Inspect inside surfaces of body side-plates that come in contact with
shackle and shackle yoke for wear and damage.
C. Inspect all pin holes for wear and elongation.
D. Inspect inside of jaw opening for displaced metal and distortion. Refer to
exploded view.
WARNING: Replace clamps containing fractures, elongated holes, dis-
torted jaw opening, distorted and worn threads and jaw openings, with
displaced metal.
Step 5.
SCREW SCP-1
A. Inspect for distortion, damaged threads and wear.
B. Inspect for fractures, particularly in the area in which the screw cup
mounts and on opposite end where holes are provided for spud wrench or
bar.
C. Inspect set screw and threaded hole for damage and distortion.