S T R U C T U R A L M E M B E R S —
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.
WARNING:
For applications not covered by the
above information, secure written
recommendations from RENFROE.
RATED CAPACITY: The rated capacity
of a RENFROE product is based on the
product being in “new or as new” condi-
tion 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 re-
duce the rated capacity. Shock loading
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 clamp.
O P E R A T I N G T E M P E R A T U R E S :
Unless specified under the Application
Section of the individual model, the ap-
proved operating temperature of
RENFROE clamps is from zero degrees
Fahrenheit (-18 Celsius) to a maximum
of 200 degrees Fahrenheit (+93 de-
grees 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 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
