U-Line S-17880 User manual

PAGE 1 OF 6 1111 IS-17880
OPERATION
Safe Operating Practices
• Inspect slings prior to each use and do not use if
damaged.
• Slings shall not be loaded in excess of their
rated capacities. Rated capacities (Working
Load Limits) must be shown by markings or tags
attached to all slings.
• Angle of lift must be considered in all lifts.
(See Figure 1)
• Slings shall be padded or protected from the
sharp edges of their loads. (See Figure 2)
• Loads must be rigged to prevent slippage.
(See Figure 3)
• Slings shall be securely attached to their loads.
(See Figure 4)
Figure 2
Figure 4
Figure 1
Figure 3
WARNING! Operator must read and understand instructions here and on sling prior to use.
S-17880, S-17881
S-17882, S-17883
S-17884, S-17885
SLINGS

PAGE 2 OF 6 1111 IS-17880
OPERATION
• Lift must be stable with respect to the center of
gravity - balanced. (See Figure 5)
• Do not point load hooks - center load in base of
hook. (See Figure 6)
• Suspended loads shall be kept clear of all
obstructions.
• All persons shall be kept clear of loads to be
lifted, and suspended load.
• Hands and fingers shall not be placed between
the sling and load while the sling is being
tightened around the load. After lifting, the load
should not be pushed or guided by employees
hands directly on the load. Ropes or "tag lines"
should be attached for this purpose.
(See Figure 7)
• Do not shock load. Jerking the load could
overload the sling and cause it to fail.
(See Figure 8)
• A sling shall not be pulled from under a load
when the load is resting on the sling. Before a
load is lifted, a place should be prepared where
it is to be put down. Lumber can be used to
allow space to remove the sling and prevent
shifting of the load. (See Figure 9)
• Temperature and chemical environment must be
considered.
• Slings shall not be shortened with knots, bolts, or
makeshift devices. (Figure 10)
Figure 5
Right
Way
Wrong
Way
Figure 9
Right Way Wrong Way
Figure 6
Right Way Wrong Way
Figure 7
Figure 10
Figure 8

PAGE 3 OF 6 1111 IS-17880
OPERATION
RATED CAPACITY
• Sling legs shall not be kinked or twisted.
(See Figure 11)
• Slings shall not be dragged on floor.
• Slings shall be stored in cool, dark, dry areas,
preferably on racks.
Figure 11
Using slings at an angle can become deadly if that angle is not taken into consideration when selecting the sling to
be used. The tension on each leg of the sling is increased as the angle of lift, from horizontal, decreases. It is more
desirable for a sling to have a larger angle of lift, approaching 90°. Lifts with angles of less than 30° from horizontal
are not recommended. If you can measure the angle of lift or the length and height of the sling as rigged, you can
determine the properly rated sling for your lift.
What would be the rating of each sling rigged at this angle?
1. Calculate the Reduction Factor [RF].
a. Using the angle from horizontal, read across
the Angle Chart (see page 4) to the
corresponding number of the Reduction
Factor column.
- OR -
b. Divide sling height* [H] by sling length* [L].
2. Reduction Factor [RF] x the sling’s rated capacity
for the type hitch that will be used = Sling’s
Reduced Rating.
* Measured from a common horizontal plane to the hoisting hook.
What Capacity sling do I need?
1. Determine the weight that the sling will be lifting [LW].
2. Calculate the Tension Factor [TF].
a. Using the angle from horizontal, read across
the angle chart to the corresponding number
of Tension Factor column.
- OR -
b. Divide sling length* [L] by sling height* [H].
3. Lifting Weight [LW] x the Tension Factor [TF] = Minimum
Sling Rating for the type of hitch that will be used.
* Measured from a common horizontal plane to the hoisting hook.
Angle from
Horizontal
90
◦
Choker Hitch Vertical Basket Hitch Vertical Hitch

PAGE 4 OF 6 1111 IS-17880
RATED CAPACITY
CHOKER HITCH ANGLES
When lifting and turning a load using a choker hitch, it is
not uncommon to bend the body of the sling around the
choker loop and have a severe bend occur around the
body at this point.
For choker angles of 120° or less, the choker rating must
be reduced by multiplying the corresponding factor
times the slings standard choker rated capacity.
Effect of Anchor Shackle Pin or Crane Hook on Sling Eye
Damage to slings can occur if the wrong size pin or hook is used. The width of the pin or
hook should never exceed the natural inside width of the eye.
Sling capacity decreases as choke angle
decreases.
1,000 lbs.
30
◦
60
◦
90
◦
120
◦
135
◦
180
◦
LOAD
D
Reduction
Factor (RF)
Angle From
Horizontal
Tension
Factor (TF)
1.000 90° 1.000
0.996 85° 1.004
0.985 80° 1.015
0.966 75° 1.035
0.940 70° 1.064
0.906 65° 1.104
0.866 60° 1.155
0.819 55° 1.221
0.766 50° 1.305
0.707 45° 1.414
0.643 40° 1.555
0.574 35° 1.742
0.500 30° 2.000
Effect of Angle ChartReduced Capacity Increasing Tension
Example:
Vertical Choker rating of each sling = 6,000 lbs.
Measured Length (L) = 6 ft.
Measured Height (H) = 4 ft.
Reduction Factor (RF) = 4 (H) / 6 (L) = .667
(RF) x 6,000 lbs. = 4,000 lbs of lifting capacity per sling
Example:
Load weight = 1,000 lbs.
Rigging - 2 slings in vertical hitch
Lifting weight (LW) per sling = 500 lbs.
Measured Length (L) = 10 ft.
Measured Height (H) = 5 ft.
Tension Factor (TF) = 10 (L) / 5 (H) = 2.0
Minimum Vertical Rated Capacity required for
this lift = 500 (LW) x 2.0 (TF) = 1000 lbs. per sling
LW = 500 lbs. LW = 500 lbs.
Angle of Choke Factor
Over 120° 1.00
90° - 120° 0.87
60° - 89° 0.74
30° - 59° 0.62
0° - 29° 0.49
Plies of
Web
Sling Width (in.)
1 2 3 4 6 8 10 12
18½ 10 11 12 16 20 24 24
28½ 10 11 12 16 20 24 24
310 12 14 16 18 24 24 24
410 12 14 16 18 24 24 24

PAGE 5 OF 6 1111 IS-17880
ENVIRONMENTAL CONSIDERATIONS
INSPECTION CRITERIA
Polyester is seriously degraded at temperatures
above 200° F.
Prolonged exposure to ultraviolet light adversely
affects polyester. Slings become bleached and stiff
when exposed to sunlight or arc welding.
Many chemicals have an adverse effect on polyester.
POLYESTER
Acids *
Alcohols OK
Aldehydes NO
Strong Alkalis **
Bleaching Agents OK
Dry Cleaning Solvents OK
Ethers OK
Halogenated Hydro-Carbons OK
Hydro-Carbons OK
Ketones OK
Oils Crude OK
Oils Lubricating OK
Soap & Detergents OK
Water & Seawater OK
Weak Alkalis OK
* Disintegrated by concentrated sulfuric acid.
** Degraded by strong alkalis at elevated temperatures.
CHEMICAL
OK
NO
WARNING! All slings should be inspected for
damage prior to each use to assure that their strength
has not been compromised.
THE DAMAGE WHAT TO LOOK FOR TO PREVENT
Surface and Edge Cuts - It is important to realize
that all of the fibers in web slings contribute to
the strength of that sling. When there have been
a significant number of fibers broken in a web
sling, that sling should be taken out of service.
Broken fibers of equal length indicate that
the sling has been cut by an edge. Red core
warning yarns may or may not be visible with
cuts and are not required to show before
removing slings from service.
Use wear pads between the sling and
all edges that come in contact with the
sling.
Holes/Snags/Pulls Punctures or areas where fibers stand out from
the rest of the sling surface.
Avoid sling contact with protrusions,
both during lifts and while transporting
or storing.
Abrasion Areas of the sling that look and feel fuzzy
indicate that the fibers have been broken
by being subject to contact and movement
against a rough surface. Affected areas are
usually stained.
Never drag slings along the ground.
Never pull slings from under loads that
are resting on the sling. Use wear pads
between slings and rough surface
loads.
Heat/Chemical Melted or charred fibers anywhere along
the sling. Heat and chemical damage can
look similar and they both have the effect of
damaging sling fibers and compromising the
slings strength. Look for discoloration and/
or fibers that have been fused together and
often feel hard or crunchy.
Never use polyester slings where they
can been exposed to temperatures
in excess of 200° F. Never use nylon
or polyester slings in or around
chemicals without confirming that the
sling material is compatible with the
chemicals being used.

PAGE 6 OF 6 1111 IS-17880
INSPECTION CRITERIA
THE DAMAGE WHAT TO LOOK FOR TO PREVENT
Knots compromise the strength of all slings by
not allowing all fibers to contribute to the lift as
designed. Knots may reduce sling strength by
up to 50%.
Knots are rather obvious problems. Never tie knots in slings and never use
slings that are knotted.
Broken/Worn Stitching in the main stitch patterns
of web slings has a direct adverse effect on the
strength of a sling. The stitch patterns in web
slings have been engineered to produce the
most strength out of the webbing. If the stitching
is not fully intact, the strength of the sling may
be affected.
Loose or broken threads in the main stitch
patterns.
Never pull slings from beneath loads
where stitch patterns can get hung
up or snagged. Never overload the
slings or allow the load edge to directly
contact the stitch pattern while lifting.
Never place a sling eye over a hook or
other attachment whose width/diameter
exceeds 1/3 the eye length.
Illegible or Missing Tags - The information
provided by the sling tag is important for
knowing what sling to use and how it will
function.
If you cannot find or read all of the
information on a sling tag, OSHA requires that
the sling shall be taken out of service.
Never set loads down on top of slings
or pull sling from beneath loads if there
is any resistance. Load edges should
never contact sling tags during the lift.
Avoid paint or chemical contact with
tags.
Red Core Yarns - are an additional warning of dangerous sling damage. When red yarns are visible, the sling should
be removed from service immediately. The red core yarns become exposed when the sling surface is cut or worn
through the woven face yarns.