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WARNING:Before putting tool in service,take to your immediatesupervisor.

Model Clamp Application, Operation and Maintenance Manual

OM 211-B2

RENFROE

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This Operators Manual covers the Application, Operationand Maintenance of this RENFROE product. OperatorsManuals for other current RENFROE products are available

upon request. Direct Requests to J.C. Renfroe & Sons, Inc.,Jacksonville, Florida 32201.

OperatorsManual

J.C. RENFROE & SONS,INCORPORATED of Jacksonville, Florida, hasbeen an international leaderin the manufacture and mar-keting of Lifting Clamps forover fifty years. RENFROE

products are manufacturedin Jacksonville, Florida. Aworldwide network of stock-ing distributors provides areadily available source ofsupply and service .

J.C. RENFROE & SONS,INCORPORATEDJacksonville, Florida 32201Telephone: 904/356-4181Toll Free: 1-800-874-8454Fax: 904/354-7865www.jcrenfroe.com

Copyright 2001 J.C. Renfroe & Sons, Inc.

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T H I S P U B L I C AT I O N S U P E R S E D E S A L LPREVIOUSLY PUBLISHED AND/OR DISTRIBUTEDINFORMATION BY MANUFACTURER AND/OR ITSDISTRIBUTORS WITH RESPECT TO APPLICABLERENFROE PRODUCTS AND SUBJECT MATTERDESCRIBED OR CONTAINED HEREIN.

NOT I CE OF E XCL US I ON OF WARRA NT Y

RE N F RO E H A S H E RE I N S E T F O RT H I NCO N S P I CU O U S L A N G U A G E A N E X CL U S I O N O F

A N Y WA RRA N TY E ITH ER E X P RE S S E D ORI MP L I E D , W H I CH I S N O T S P E CI F I CA L LY A N D

PA RT I C U L A R L Y C O NTA I N E D H E R E IN . P L E A S ERE F E R TO T H AT S TA T E ME N T F O R

RE P RE S E N TAT I O N S A N D WA RRA N T I E S O F

P RO D U CT S MA N U FA CT U RE D BY J . C . RE N F RO E &S O N S , I N C.

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 areimportant in determining the limitations and proper appli-cation of RENFROE products.

Failure to review and utilize recommended appli-cations, operation and maintenance instructions mayresult in serious injury to operator and others.

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OPERATING AIDS

(DOS AND DONTS)1. DO read and understand the Operators Manual before using the clamp2. DO Consult Operators Manual or RENFROE when in doubt.3. DONT Lift over workmen DONT 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. DONT lift with lock in open orLock Open position.6. DONT Use a connection that may release the clamp.7. DONT attach clamp directly to crane hook. DO use a flexible connection

between crane and clamp shackle. DONT use heavy flexible connection.8. DO use correct clamp for job. DONT use large capacity clamps to lift light

loads.9. DO Use an adequate number of clamps to balance load. DONT lift loads

that are not balanced.10. DO Use clamps within their rated capacity. DONT overload clamps11. DO Inspect clamp before each lift, follow inspection and maintenance in-

structions outlined in this manual and use RENFROE replacement parts toassure proper operation of the clamp

12. DONT Use clamp that has been overloaded. DO refer to pre-lift inspectionin Operators Manual

13. DONT Side load with a straight shackle clamp. DONT lift from side withvertical clamp

14. DONT Misuse. DONT lift plate from bottom of plate stack.15. DONT Rush. DONT lift more than one plate at a time with a vertical clamp.16. DONT Improvise. Always use correct clamp for job. DONT lift plate hori-

zontally with a vertical lift only clamp.17. DONT Alter clamp. DONT grind, weld or modify the clamp in any manner.

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DEFINITIONS VERTICAL LIFT: The lifting of a singleplate or member in which the liftingforce exerted by the rigging is directlyabove and in line with the lifting shackleas 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 ormember thru a ninety degree (90) arcand back to vertical thru the sameninety degree (90) arc or from horizon-tal to vertical to horizontal thru a onehundred and eighty degree (180) arc.

Refer to Application Section of specificTurn/Lift clamps for further detail. Dur-ing the turning operation the edge of theplate opposite the edge to which theclamp is attached should always be incontact with a supporting surface suchas a factory floor and the load on theclamp not exceed one half rated capac-ity of clamprefer to illustrations shownbelow.

HORIZONTAL LIFT: Clamps (used inpairs or multiples) are attached to theside edges of a plate or bundle ofplates positioned horizontally to thefloor level. The rigging attached to

clamps is generally multi-legged slingswith the connecting point of the slingsbeing approximately centered betweenthe distance separating the clamps.Refer to illustrations shown below.WARNING: The capacity of all hori -zontal clamps is based on a slingangle of sixty degrees (60). Seeillustration below. Sling angles lessthan s ixty degrees (60) increase theload exerted on the clamps, Neverexceed the rated capacity of a singleclamp.

STEEL PLATES: Unless otherwisespecified, lifting clamps are manufac-tured to handle hot-rolled steel plateswhose Brinell Hardness does not ex-ceed 300. WARNING: Do not liftplates with coatings or mill scalethat prevent the gripp ing sur faces of

the clamp from making positive con-tact with the base metal.For applications not covered by theabove information, secure written rec-ommendations from RENFROE.

FINISHED AND POLISHED PLATES:Steel plates in this category have otherthan hot-rolled surfaces such asstainless steel, etc., are generally han-

dled using non-marring clamps incor-porating smooth gripping surfaces.WARNING: For applications usingclamps with serrated gripping sur-

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faces on finished or po lished plates,secure written recommendationsfrom RENFROE.

S T R U C T U R A L M E M B E R S

FABRICATED SECTIONS: Unlessotherwise specified, clamps describedas capable of handling structural mem-bers and fabricated sections are limitedto hot-rolled steel whose Brinell Hard-ness does not exceed 300. WARN-ING: For applications not coveredby the above information, securewritten recommendations fromRENFROE.

RATED CAPACITY: The rated capac-ity of a RENFROE product is based onthe product being in new or as newcondition and represents the maximumload the product is to be subjected towhen utilized in the manner describedin this manual. Wear, misuse, abuseand other factors relating to usage mayreduce the rated capacity. Shock load-ing and the factors listed must be takeninto consideration when selecting aRENFROE product for a given applica-tion.

PLATE THICKNESS: The minimumand maximum plate thickness a clampspecified for handling plates is capableof lifting. WARNING: Never use a

clamp for lifting a plate where theplate thickness is less than orgreater than the minimum and maxi-mum stenciled on the clamp.

JAW OPENING: The minimum andmaximum thickness of a member ofclamp specified as having a JAWOPENING is capable of handling.WARNING: Never use a clamp on a

member whose thickness is lessthan or greater than the range of jaw

opening stenciled on the clamp.

OPERATING TEMPERATURES:Unless specified under the ApplicationSection of the individual model, the

approved operating temperature ofRENFROE clamps is from zero de-grees Fahrenheit (-18 Celsius) to amaximum of 200 degrees Fahrenheit(+93 degrees Celsius). The minimumand maximum temperatures apply toboth ambient and the material beinghandled by the clamp. WARNING:Secure written authorization fromRENFROE before using clamps intemperatures other than shown.

HOT LIFTS: The Model R and Sclamps are available in modificationsthat are capable of making lifts wherethe temperatures of the member beinglifted exceeds 200 degrees Fahrenheit(+93 degrees Celsius). Depending onconditions a lift may exceed 1000 de-grees Fahrenheit (538 degrees Cel-sius). The exact application and tem-peratures of the plates to be handledare critical in selecting the propermodel. WARNING: Secure wr itteninstructions from RENFROE for allhot lift applications.

LOCKING CLAMPS: Locking clampsare divided into the categories listed

below. With the exception of theLocking Wedge and Locking Screwtype the purpose of the locks are tofacilitate the attaching and removing ofthe clamp from the member being han-dled.

LOCK CLOSED - an overcenterspring loaded mechanism in which thespring exerts a force on the gripping

cam when the lock handle is moved tothe Lock Closed position. When the

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handle is moved to unlocked positionthe force exerted by the spring is re-laxed and the gripping cam may beretracted by pushing the lifting shackle

into body of clamp. Refer to the Op-eration Section of specific models ofLock Closed clamps for additionaldetails. Typical Lock Closed clampsare Models DG, FR and M.

LOCK OPEN ONLY - normally usedon Hot Lift clamps and consists of amanually operated Lock Stop Pin thatis inserted when gripping cam of clamp

is retracted and removed when clampis positioned on the plate. Tag linemay be used to permit operator to re-move pin from a greater distance fromclamp. Refer to the Operation Sectionof specific model of Lock Open Onlyclamps for additional details. TypicalLock Open Only clamp is the ModelRO.

LOCK OPEN-LOCK CLOSED - anover-center spring loaded mechanismin which the spring exerts a force onthe gripping cam when the lock handleis moved to the Lock Closed position.When the handle is moved to the LockOpen the gripping cam is maintainedin the retracted position for ease in in-stalling the clamp on a plate or mem-ber. The Model FRD contains individ-ual Lock Open and Lock Closedmechanisms that must be operatedseparately. Refer to the OperationSection of specific models of the LockOpen-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 steelwedge that is driven in place with a

hammer. The body of the wedge ispositioned in a slot in the clamp bodywith the fluted edges contacting themember to which the clamp is being

attached. Refer to Operation Sectionof specific models of the LockingWedge clamps for additional details.Typical Locking Wedge clamps areModel A1, B1, B2 and PB.

LOCKING SCREW - Lock Screwclamps depend on manually adjustinga screw to hold the gripping surface inplace for lifting and removing the clamp

from member being lifted. Refer toOperation Section of a specific modelof Locking Screw clamps for addi-tional details. Typical Locking Screwclamps are Models AC, ACP, NM, PC,SCP and SCPA.

NON-LOCKING: Non-Lockingclamps have no mechanisms to aid inattaching or removing clamp frommember being lifted. It is necessary tohave position of clamp maintained onthe member being lifted until a properlyapplied force is exerted to the liftingshackle. Refer to Operation Section ofspecific models of the Non-Lockingclamps for additional details. TypicalNon-Locking clamps are Model AST,

ASTL, BD, HR, HDR and WHSR.WARNING: A pointing out and noticeof danger. The purpose of aWARNING is to apprise the operatorand all other affected persons of theexistence of danger of which he shouldbe but may not be aware and to enablethe operator to protect himself and oth-ers where applicable against such dan-ger. An attempt is made herein towarn against reasonable and reasona-

bly foreseeable danger in the properuse and possible reasonable misuse ofRENFROE products described in thismanual.

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DESIGNATED PERSON A personselected by the employer or the em-ployers representative as being compe-tent to perform those specific duties.

QUALIFIED PERSON A person who,by possession of a recognized degree inan applicable field or certificate of pro-fessional standing, or who, by extensiveknowledge, training, and experience,has successfully demonstrated the abil-ity to solve problems relating to the sub-

ject matter at hand.

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MODEL B-2

Application

The model B-2 is a beam trolley clamp that provides connec-tion of a hoist or chain falls to an overhead beam and enablesthe clamp to be moved along the beam as a necessity arises.Refer to Illustration A.

Equipped with four heavy-duty rollers, the model B-2 , with theload attached, can be moved along the length of American Stan-dard or wide flange beams. The fluted tool steel locking wedgepermits the clamp to be temporarily or permanently locked at aparticular position along the beam. The clamp is supplied withor without the locking wedge. Refer to Definitions for explana-tion of Locking Wedge clamp.

For identification of component parts, refer to exploded view ofclamp located at the end of the Maintenance Section.

WARNNG: Refer to the sections on operation and mainte-nance for the approved procedures in the operation andmaintenance of this product .

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Operation B-2

Step 1

Before using any RENFROE clamp, refer to the Application Sec-tion to confirm the operation to be undertaken is an appropriateapplication for this product.

Step 2Select appropriate capacity flange or angle width. The modeldesignation, capacity and flange width are stenciled on theclamp.

WARNING: Never exceed rated capacity or use on a flangewidth that is not within the range stenciled on the clamp.

Always use a clamp with maximum flange width near equal tothe flange or angle width of the member to which the clamp isattached.

WARNNG: Make certain the beam the clamp is attached to

is capable of suppor ting the rated capacity of the clamp.Step 3Inspect clamp before each lift.

WARNING: Do not use if in need of repair.

If in doubt, refer to Maintenance Section for detailed mainte-nance instructions and exploded view of the clamp for part iden-

tification. 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 illegibleC. Inspect locking wedge gripping surfaces for wear and defects.

Gripping surfaces must be sharp and free of defects.D. Inspect condition of body for damage and distortion.E. Inspect rollers for wear and damage.

F. Inspect roller shafts and locking nuts. Nuts must be in place andtight.

G. Remove any clamp from service if in need of repair.

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Step 4The clamp is a component of the rigging used in the lifting ortransporting of members. It is important to use safe and ade-

quate rigging.

WARNING: Improper or excessively heavy rigging may in-terfere with the operations of the clamp and its ability tomaintain proper position on the member. Never attachcrane hook directly to the clampalways use sling betweencrane hook and clamp.

Step 5 Assemble the hook body half to beam by sliding rollers overflange of beam. Refer to Photograph B.

Step 6 Assemble second hook body half to first by sliding slotted open-ings over lugs until shackle holes are aligned. Refer to Photo-graph C.

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Step 7Bolt holes are provided in each body half for Locking the body

halves together. Insert bolt in locking holes of both bodyhalves and secure with a lock nut. Always use largest size boltpossible to fit locking holes. Refer to Photograph D.

WARNING: Locking bolts must be used when clamp is notsupplied with locking wedge.

Step 8Move clamp to directly above load.WARNING: Never exceed 30 degrees side-loading.Refer to Photographs E, F and G.

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Step 9Insert locking wedge in guide slot with fluted gripping surfacescontacting flange of beam. Refer to Photograph H.

Step 10Drive the wedge in firmly. Refer to Photograph J.

Step 11 Apply load to clamp. Drive wedge in until gripping surfaces ofthe wedge penetrate the surface of the beam. Refer to Photo-graph K.WARNING: When wedge is not used, clamp may roll on

beam when load is applied.

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Step 12Commence lift.WARNING: The operator should position himself away fromand fully clear of the member to be lifted. Do not commencelift unti l all personnel are clear of the area of the lift . Neverstand under or near a member being li fted.

Step 13To remove clampremove lifting rig from clamp. Drive wedgeout of guide slot. Remove locking bolt. Slide clamp halves apartand remove from beam.

Step 14Inspect clamp. Remove from service if in need of repair.WARNING: In the event the stencil ing is worn and not legi-ble or the tag containing the model, capacity and other per-tinent information is missingdo not use clamp until it hasbeen properly labeled.

Inspection kits are available to no charge upon request from thedistributor or RENFROE. Kit contains:

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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 forthe clamp. The frequency and type of inspection is determined by theclamp owner. Renfroe acknowledges the ASME B30.20 safety standardwhich sets forth minimum inspection requirements for Below-the-Hooklifting devices and the Renfroe Recommended Inspection Schedulemeets and/or exceeds the ASME inspection recommendations.

Before using a clamp operators should be trained by a qualifiedperson 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 theclamp.

Check the clamp to be certain the Identification andwarning tags are present and legible.

Do not use the clamp if the tags are missing or illegible Inspect locking wedge gripping surfaces for wear and de-

fects. Gripping surfaces must be sharp and free of defects. Inspect condition of body for damage and distortion. Inspect rollers for wear and damage. Inspect roller shafts and locking nuts. Nuts must be in place

and tight.

Remove any clamp from service in need of repair.

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Warning: If any hazardous condition is found that may causeinjury to the operator or other personnel then the clamp shouldbe subjected to a Periodic Inspection by a Qualif ied Person.

Repair (replacement of worn parts)During regular maintenance when replacing parts that areworn a record should be made of the parts replaced. After thereplacement 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 arecord should be made of the repair. At this time the clampshould be marked with the following information as per the

ASME B30.20 requirements:

Name and address of the repairer Repairers unit identification Clamp weight (if altered) Rated load (if altered)

ASME BTH-1 Design Category (if altered) ASME BTH-1 Service Class (if altered)

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Model B-2 Periodic Inspection Procedures

Step 1

Verify the identity of the clamp by checking the I. D. plate on the clampbody. If the I. D. plate is missing or not legible an RFID chip (RadioFrequency Identification Device) is embedded in the clamp body or aclamp component. If the I. D. plate is missing and the RFID chip is un-available call the Renfroe factory for instructions on returning theclamp for recertification.Step 2Completely disassemble clamp.

Step 3Remove all dirt, grease or other matter that may inhibit proper inspec-tion of the clamp body or clamp components.Step 4. BODY (Two Halves)

A. Inspect welds for fractures. RENFROE recommends a dye pene-trant or similar method of detecting indications on the clamp. If an indi-cation is found it may be necessary to use a magnetic particle, ultra-sonic or similar methods for determining damage to the clamp or com-ponents.

A. Inspect the four body hooks for uniformitywhen clamp is assem-bled to a flange of a beam and before the locking wedge is drivenin, the four rollers mounted on the hooks must contact the flangesimultaneously.

B. Inspect shackle holes for wear and elongation.C. Inspect body lugs, slotted openings and roller mounting holes for

wear and distortion.D. Inspect locking wedge guide slot in body for fractures and wear.WARNING: Replace clamps containing fractures; elongated

holes and damaged or distorted body lugs and assembly s lots .

Step 5ROLLER ASSEMBLY B-2-3

A. Inspect rollers for wear and damage. Make certain the retainingrings holding the rollers in place on the bearing shaft are in posi-tion.

B. Inspect bearing shafts for distortion and wear.C. Inspect bearings. Rollers should turn freely.

D. Inspect bearing shaft locking nuts. Nuts must be in place and tight.WARNING: Replace rollers , bearing and bearing shafts that aredistorted, damaged or worn.

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Step 6LOCKING WEDGE B-2-4The model B-2 is supplied with or without locking wedge. Makecertain the locking wedge is attached in the application for theclamp requires a wedge.

A. Inspect locking wedge gripping surfaces for wear and dam-age. Gripping surfaces must be sharp and free of defects.

B. Inspect locking wedge chain. Chain must be attached to thebody of the clamp and to the locking wedge.

WARNING: Replace locking wedges that are dul l or dam-aged.

Step 7 ASSEMBLY After reassembly, check operation of clamp. Rollers should turnfreely.WARNING: All retaining pins and fasteners must be in place.

GENERAL

RENFROE products may be returned to the factory for inspectionand refurbishment in accordance with an established fee sched-ule.

Use only RENFROE replacement parts to insure maximum effi-ciency and safety factor originally built into product. Refer toRENFROE catalog for instructions on ordering replacement parts.

WARNING: Do not weld, grind or modify the clamp body orcomponent parts in any manner. In the event the stencilingis worn and not legible or the tag containing the model, ca-pacity or other pertinent information is missingdo not useclamp until it has been properly labeled.

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EXCLUSION OF WARRANTY

THERE EXISTS NO WARRANTIES NEITHER EX-PRESSED NOR IMPLIED WHICH EXTEND BE-YOND THE DESCRIPTIONS OR STATEMENTS

CONTAINED IN THE FACE OR ANY PARTHEREOF.

J.C. RENFROE & SONS, INC.P.O. Box 4279 1926 Spearing Streeet Jacksonville, Florida 32206

Phone: U.S.A. Toll Free (800) 874-8454 (in Florida 904/356-4181)Facsimile: 904/354-7865 Internet: www.jcrenfroe.com