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Products
General
Information
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!!WARNING!!
The capacity of a sling to lift weight DECREASES as the angle of the sling
moves away from being vertical. If the angle of the sling is not taken into consideration
before selecting a sling to lift a load, SERIOUS INJURY OR DEATH COULD RESULT from the
load being dropped |
| Sling
Angle Capacities If you know the lifting angle
of the sling being used, you can apply the Capacity Reduction Factor A
or the Load Multiplier B in the Sling
Angle chart. If you don't know the angle:
- Attach the sling(s)
- Apply lift until the slings are taut and the load is
ALMOST ready to leave the ground (BUT DO NOT LIFT THE LOAD OFF THE GROUND!!)
- Measure the length of the sling between the lift
point and the load
- Measure the height between the lift point and the
load (see Fig. 1 below)
 |
Angle
from
Horizontal |
A
Capacity
Reduction
Factor |
B
Load
Multiplier |
| 90° |
1.000 |
1.000 |
| 85° |
0.996 |
1.005 |
| 80° |
0.985 |
1.016 |
| 75° |
0.966 |
1.036 |
| 70° |
0.940 |
1.064 |
| 65° |
0.906 |
1.104 |
| 60° |
0.866 |
1.155 |
| 55° |
0.819 |
1.222 |
| 50° |
0.766 |
1.306 |
| 45° |
0.707 |
1.415 |
| 40° |
0.643 |
1.556 |
| 35° |
0.574 |
1.743 |
| 30° |
0.500 |
2.000 |
Situation 1
Capacity Reduction Factor
When you know the appropriate rated capacity of the sling,
and you need to calculate its actual capacity (based on the sling angle), follow the
instructions below: (The example uses a measured length of 12 feet and a measured height
of 8 feet.)
Measured Length (L): 12 feet
Measured Height (H): 8 feet
Reduction Factor (RF) = H/L=8/12 = 0.667
Rated Capacity* of sling = 1,000 lbs.
Actual Capacity of sling = Rated Capacity x RF =
1,000 X 0.667 = 677 lbs.
|
Situation
2
Load Multiplier
When you know the actual weight of the load, and you
need to calculate the appropriate rated capacity (based on the sling angle) of the sling
to lift the load, follow the instructions below: (The example uses a measured length of 12
feet and a measured height of 8 feet.)
Measured Length (L): 12 feet
Measured Height (H): 8 feet
Load Multiplier (LM) =L/H=12/8 = 1.5
Load weight: 1000 lbs.
Necessary Rated Capacity* of sling = Load Weight x LM =
1,000 X 1.5 = 1,500 lbs. |
| Example: Polyester
Roundsling size no. 1(purple) without fittings, 5,200 lb. vertical basket hitch rating
used in a basket hitch at a 60° angle. |
 |
| 5200 lbs |
X |
0.866 |
= |
4500 lb Rated Capacity |
Roundsling Rating
Vertical Basket |
Factor from
Sling Angle Chart |
Rated Capacity |
| Inspection Criteria for Twintex® Roundslings Remove from Service When:
- Cuts to sling cover expose red-striped white core
yarns
- Holes, tears, snags or abrasions expose red-striped
white core yarns
- end fittings are pitted or corroded, cracked,
distorted or broken
- The sling shows signs of melting, charring, or
chemical damage
- Capacity tag is illegible or missing
- Other visible damage which causes doubt as to the
strength of the sling
Note: Do not expose roundslings
to temperatures exceeding 194° F. |
| Chemical |
Polyester |
Nylon |
| Acid |
* |
NO |
| Alcohols |
OK |
OK |
| Aldehydes |
NO |
OK |
| Strong
Aldalis |
** |
OK |
| Bleaching
Agents |
OK |
NO |
| Dry
cleaning Solvents |
OK |
OK |
| Ethers |
NO |
OK |
| Halogenated
Hydrocarbons |
OK |
OK |
| Hydrocarbons |
OK |
OK |
| Ketones |
OK |
OK |
| Oils,
Crude |
OK |
OK |
| Oils,
Lubricating |
OK |
OK |
| Soap
and Detergents |
OK |
OK |
| Water
and Seawater |
OK |
OK |
| Weak
Alkalis |
OK |
OK |
THIS
IS A GENERAL GUIDELINE ONLY
*Disintegrated by concentrated sulphuric acid.
**Degraded by strong alkalis at elevated temperatures. |
| Warranty SpanSet, Inc. agrees (at its option) to repair, replace or
credit the cost of any product which it has manufactured and which is found to be
defective in materials or workmanship provided that written notice of such defect is
received by SpanSet, Inc. within 90 days from the date of shipment. SpanSet will accept
return of its products only upon its prior written authorization after receiving such
notice. No authorization or allowance for repairs or alterations of any product will be
given by SpanSet except by its written acknowledgment. Items not manufactured by SpanSet,
Inc. will carry their manufacturer's warrenties and none other.
The foregoing is in lieu of all warranties, expressed or implied,
and all other obligations or liabilities on the part of SpanSet, including the warranties
of merchantability and fitness. In no event shall SpanSet, Inc. be liable for
consequential or special damages or for transportation, installation, adjustment or other
expenses which may arise in connection with such products. |
- Additional TWINTEX® Product
Information:
- Last modified: September 14, 1998
| |
Chains
LoadBinders
Cargo Bar Holder
Link to
the Federal Motor Carrier Standards
|
-USA
