A more salient approach to determine sling adequacy is the calculation of INCREASED TENSION resulting from the Sling-to-Load Angle. This approach has the distinct advantage of enabling the sling user to determine the required sling strength requirement. The user must first determine the angle and multiply the load weight (per leg) by the tension factor for the specific angle, and the result is the INCREASED TENSION or actual loading on the sling leg(s).
1.Calculate the Sling to Load Angle.
2. Determine the corresponding Tension Factor
3.Multiply the load weight (per leg) by the Tension Factor to determine the increased tension on the sling leg(s).Use the same way above to calculate the application case actual loading for the choker hitch angle webbing sling with their reduction factors
QINGDAO HIDEA PARAMETER SHEET FOR
SLING-TO-LOAD ANGLE &CHOKER HITCH ANGLE
| TENSION FACTOR CHART | ||||||
| ANGLE"A" DEGREES | TENSION FACTOR | ANGLE"A" DEGREES | TENSION FACTOR | |||
| 90 | 1.000 | 55 | 1.221 | |||
| 85 | 1.004 | 50 | 1.305 | |||
| 80 | 1.015 | 45 | 1.414 | |||
| 75 | 1.035 | 40 | 1.555 | |||
| 70 | 1.064 | 35 | 1.742 | |||
| 65 | 1.104 | 30 | 2.000 | |||
| 60 | 1.155 | 25 | 2.364 | |||
| SUNG TENSION INCREASES AS THE SUNG-TO-LOAD ANGLE DECREASES AT 90°-SLING TENSION=5,000 PER LEG AT 60°-SLING TENSION=5,775 PER LEG AT 45°-SUING TENSION=7.070 PER LEG AT 30°-SLING TENSION=10,000 PER LEG | ||||||||||||
| SLING-TO-LOAD ANGLE (DEGREES) | 90° | 60° | 45° | 30° | ||||||||
| LOAD WEIGHTXTENSION FACTOR | 10,000Lbs ×1.000 | 10,000Lbs X1.155 | 10,000Lbs X1.414 | 10,000Lbs ×2.000 | ||||||||
| INCREASED SLING TENSION | 10,000 Lbs | 11,550 Lbs | 14,140 Lbs | 20,000 Lbs | ||||||||
| CHOKER HITCH ANGLE REDUCTION CHART | |
| Choker Hitch Angle (Degrees) | Reduction Factor |
| 120-180 | 1.00 |
| 105-120 | 0.82 |
| 90-105 | 0.71 |
| 60-90 | 0.58 |
| 0-60 | 050 |
