|
VERTICAL
Single
leg to load in straight lift. The full rated lifting capacity
can be used, but not exceeded. Load should not be allowed
to rotate since this can damage the sling.
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|
BASKET
A basket
hitch equally distributes the load between the two legs of
a sling. Consideration must be given to the angles created
in basket hitches since they reduce the rated capacity.
(See "How Angles Effect Sling Stress" below)
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CHOKER
Using
the sling as a choker reduces its rated capacity. Rating in
the following sling charts have lower capacity for choker
hitches than vertical loadings to reflect this. When using
a choker sling at an angle of less than 120 degrees (see drawing)
the choker rated capacity must be reduced.
|
|
Angel of Choke
|
|
Rated Capacity Factor
|
| 120 - 180° |
= |
100% |
| 90 - 119° |
= |
87% |
| 60 - 89° |
= |
74% |
| 30 - 59° |
= |
62% |
| 0 - 29° |
= |
49% |
|
Choker
Hitch rated capacity adjustment
|
Design
Factors for Slings
Rated capacities
for nylon slings used in general purpose lifts are calculated to a
design factor of 5. That is, the maximum load capacity is 1/5 of the
nominal breaking strength of the sling. Never exceed the rated capacity
of a sling.
WARNING!
|
| Sling
Eyes: Inspect eyes before each use for damage from
hook or pin contact. Do not use a hook or pin with a diameter
greater than the design width of the eye. (Do not put a sling
eye 4" x 8" over a 6" pin for example).
Protect
sling body from sharp edges when rigging. Wear pads reduce
damage to the slings when they come in contact with rough
or sharp loads.
Inspect
all slings before each use. Never use slings that have been
damaged or overloaded.
- Always
protect nylon slings with pads and/or wooden blocks around
edges of a load.
- Web
Slings will stretch when loaded.
- Do
not attempt to pull jammed or snagged loads free with
a web sling or any sling.
- Recoil
can cause serious injury or death.
|
|
WARNING!
|
 |
- Failure
to comply with this warning may result in serious load
damage and DEATH OR INJURY.
- Use
only if trained.
- Can
fail if damaged, misused or overloaded.
- Inspect
sling for damage before each use.
- Always
protect sling webbing from sharp edges of load.
- Do
not attempt to use sling above rated lifting capacity.
- Do
not use sling if rated capacity tag is removed or unreadable.
- Avoid
acid, alkali and sunlight.
- Do
not expose slings to temperatures above 180°F.
- Do
not tie knots in sling webbing as strength is greatly
reduced.
- Do
not use sling if there are any signs of cut webbing, heat
or chemical damage, excessive wear, or other defects.
- Consult
sling load chart for basket hitch capacity reduction due
to sling angle.
- DISCARD
WHEN RED CORE YARNS APPEAR.
|
How
Angles Effect Sling Stress
As
the angle between the legs of the sling increase, the load each
leg has to lift increases. This applies to a single sling used
in a basket hitch as well as a multileg sling or bridle. See
illustration below.
- First,
divide the total load to be lifted by the number of legs
to be used. This provides the load per leg if the lift were
being made with all the legs lifting vertically.
- Determine
the angle between the legs of the sling and the verticle.
- Then
MULTIPLY the load per leg by the Load Factor for the leg
angle being used (from the table at right) to compute the
ACTUAL LOAD on each leg for this lift and angle.
NOTE:
THE ACTUAL LOAD MUST NOT EXCEED THE RATED SLING CAPACITY.
- Example:
In drawing three (sling angle of 45 degrees): 1000 ÷ 2 =
500 (Load Per Leg if a vertical lift) 500 x 1.414 = 707lbs.
= ACTUAL LOAD on each leg at the 45 degree horizontal angle
being used.
|
| LEG ANGEL (Degrees) |
LOAD FACTOR |
| 0 |
1.000 |
| 5 |
1.003 |
| 10 |
1.015 |
| 15 |
1.035 |
| 20 |
1.064 |
| 25 |
1.103 |
| 30 |
1.154 |
| 35 |
1.220 |
| 40 |
1.305 |
| 45 |
1.414 |
| 50 |
1.555 |
| 55 |
1.743 |
| 60 |
2.000 |
|
|
WARNING!
|
 |
Inspect
wire rope or sling and consult industry recommendations and
OSHA standards before each use. This wire rope or sling may
fail if it is damaged, abused, misused, overused or improperly
maintained. Sling leg slings should not be allowed to rotate.
DEATH
OR INJURY can occur from improper use or maintenance. Any
Questions? Call METRO WIRE ROPE CORP.
|
Spectrum
8® Alloy Chain Slings
Working load
limit - 4 to 1 Design Factor
| Type |
Description |
Type |
Description |
| CO |
Single Chain
Sling with Master Link each end |
SSS |
Single Chain
Sling with Sling Hook each end |
| SOS |
Single Chain
Sling with Master Link and Sling Hook |
SGG |
Single Chain
Sling with Grab Hook each end |
| SOG |
Single Chain
Sling with Master Link and Grab Hook |
SGS |
Single Chain
Sling with Grab Hook and Sling Hook |
| SOF |
Single Chain
Sling with Master Link and Foundry Hook |
ASOS |
Adjustable
Single Chain Sling with Master Link and Sling Hook |
| Type |
Description |
| DOS |
Double
Chain Sling with Master Link and Sling Hook |
| DOG |
Double
Chain Sling with Master Link and Grab Hook |
| DOF |
Double
Chain Sling with Master Link and Foundry Hook |
| ADOS |
Adjustable
Double Chain Sling with Master Link and Sling Hook |
| Type |
Description |
Type |
Description |
| TOS |
Triple
Chain Sling with Master Link and Sling Hook |
QOS |
Quadruple
Chain Sling with Master Link and Sling Hook |
| TOG |
Triple
Chain Sling with Master Link and Grab Hook |
QOG |
Quadruple
Chain Sling with Master Link and Grab Hook |
| TOF |
Triple
Chain Sling with Master Link and Foundry Hook |
QOF |
Quadruple
Chain Sling with Master Link and Foundry Hook |
|
