Renfroe S Series Guida all'installazione

WARNING:

Before putting tool in service,

take to your immediate

supervisor.

Model S Clamp

Application, Operation and Maintenance Manual

OM 211-S

RENFROE

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: 904/356-4181

Toll Free: 1-800-874-8454

Fax: 904/354-7865

www.jcrenfroe.com

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

ninety degree (90°) arc or from horizon-

tal 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. Dur-

ing 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 factory floor and the load on the

clamp not exceed one half rated capac-

ity of clamp—refer to illustrations shown

below.

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

stainless steel, etc., are generally han-

dled using non-marring clamps incor-

porating 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

RENFROE.

RATED CAPACITY: The rated capac-

ity 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

greater than the minimum and maxi-

mum 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:

Unless 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 Cel-

sius). The exact application and tem-

peratures of the plates to be handled

are critical in selecting the proper

model. WARNING: Secure written

instructions 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 Op-

eration 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 individ-

ual “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 addi-

tional 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 S

VERTICAL LIFTING

LOCKING

Application

The model “S” is a vertical lifting clamp and is an effective tool for construction

and erection. Refer to illustrations shown below. It incorporates a “Lock

Open”, “Lock Closed” feature which facilitates attaching and removing the

clamp from the plates. Refer to Definition Pages for the explanation of “Lock

Open”, “Lock Closed”.

Refer to exploded view of clamp located at the end of the Maintenance Sec-

tion for identification of component parts.

WARNING: Refer to the sections on operation and maintenance for the

approved procedure in the operation and maintenance of this product.

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