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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-

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Содержание TL

Страница 1: ...WARNING Before putting tool in service take to your immediate supervisor Model TL A Clamp Application Operation and Maintenance Manual OM 211 TL A RENFROE ...

Страница 2: ...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...

Страница 3: ...H 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 an...

Страница 4: ......

Страница 5: ...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 refe...

Страница 6: ...tes 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 six...

Страница 7: ...er 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 tempera...

Страница 8: ...KING 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 clamp...

Страница 9: ...rform 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 ...

Страница 10: ...y degree arc Refer to Illustra tion A The auxiliary lock prevents the lock handle from moving from the Lock Closed position until the auxiliary lock button is manually depressed The Lock Open Lock Closed feature facilitates attach ing and removing the clamp from the plate Refer to Definition Pages for explanation of Lock Open Lock Closed clamp The Model TL is identical to the model TLA except that...

Страница 11: ... TL to turn a plate from horizontal to vertical the operator must position the clamp so the lock handle is always on the topside of the plate when the plate is in the horizontal po sition Refer to the sections on operation and maintenance for the ap proved procedures in the operation and maintenance of this product Illustration A Illustration B ...

Страница 12: ...t gripping surfaces for wear and defects Gripping surfaces must be sharp and free of foreign matter D Inspect condition of body for wear damage and distortion particularly in the area of the jaw opening E Inspect lifting shackle and all pins for wear and damage F Lock spring must have definite amount of tension when the lock is moved to the Lock Closed position without material in the clamp Lock P...

Страница 13: ...pping cam is maintained in retracted position Refer to Illustrations C and D Step 6 Position clamp on plate being lifted WARNING When using the model TL for lifting from horizontal to ver tical the clamp must be positioned with the lock handle always on the ...

Страница 14: ...dge of plate Maintain 1 4 clearance Refer to Illustrations C and D Step 5 Position clamp so direction of force applied by the crane is in line with the lift ing shackle WARNING Never exceed ten degree side loading Refer to Photographs E F G H and J ...

Страница 15: ...ace the lock lever in the Lock Closed position Lock Pawl must rest on body spacer sleeve Spring now exerts force on gripping cam One model TLA make certain the auxiliary lock button projects from the housing and fully engages the lock handle WARNING Lift only when clamp is in Lock Closed position Refer to Illustrations C and D Step 5 and Photograph K ...

Страница 16: ... remove clamp after plate is fully supported and at rest in a stable posi tion relax lifting force keeping hands clear depress auxiliary lock button on the TLA move lock handle to Lock Open position Lift clamp from plate Refer to Illustrations C and D and Step 5 Step 11 Inspect clamp Remove from service if in need of repair WARNING In the event the stenciling is worn and not legible or the tag con...

Страница 17: ... 12 Inspection Kits are available at no charge upon request from the distributor or RENFROE Kit contains RENFROE clamps are constructed so the wearing parts may be replaced by installing individual parts or by using RENFROE Repair Kits containing all parts generally replaced due to normal wear ...

Страница 18: ...on A A visual inspection by the operator before and after each lift made by the clamp B Check the clamp to be certain the identification and warning tags are present and legible C Do not use the clamp if the tags are missing or illegible D Inspect gripping surfaces for wear and defects Gripping surfaces must be sharp and free of foreign matter E Inspect condition of body for wear damage and distor...

Страница 19: ...s 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...

Страница 20: ...he 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...

Страница 21: ...4 BODY A Inspect welds for fractures RENFROE recommends a dye penetrant 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 simi lar methods for determining damage to the clamp or components B Inspect shackle pin guide slots located inside body Guide slots must be smooth and free of indentations where shackl...

Страница 22: ...nd shackle pin hole Step 6 CAM ASSEMBLY TL 2 A Inspect cam for chipped or worn teeth Teeth must be sharp and free of foreign matter B Inspect cam straps for distortion and fractures C Inspect pin holes in cam straps and cam for elongation and wear WARNING Replace cam assemblies that have cams with worn or dam aged teeth and contain fractures and cams and cam straps with elon gated pin holes Step 7...

Страница 23: ...acts shackle Re place if worn B Inspect auxiliary lock housing for distortion and wear C Inspect auxiliary lock button The button must move in and out of housing without binding The spring must be capable of maintaining button in ex tended position WARNING Replace the auxiliary lock if damaged or the auxiliary lock button spring does not maintain the button in the extended position Step 11 LOCK SP...

Страница 24: ...ssemblies that have worn or damaged parts fit loosely in the body mounting hole and do not have a definite Over Center Lock Closed position Replace worn and damaged bearings Step 13 ASSEMBLY After reassembly check operation of clamp All parts should move freely without binding Refer to exploded view for proper location of component parts WARNING All retaining pins and fasteners must be in place in...

Страница 25: ...HICH EXTEND BE YOND THE DESCRIPTIONS OR STATEMENTS CONTAINED IN THE FACE OR ANY PART HEREOF 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 ...

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