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Views: 2 Author: Site Editor Publish Time: 2023-07-21 Origin: Site
What is the STF-Standard Tension Force?
The abbreviation STF “Standard Tension Force” stands for the pre-tensioning force also called “Normal Tensioning Force”, which describes the force of the lashing strap. Put simply, with an STF value of 350 daN: you pull or push on a ratchet lever with exactly 50 daN (SHF) and can lift/move a weight of 350 kg with this force. The main reason for high pre-tensioning forces are the high-quality products, in this case, the ratchet and the lashing strap, which have been optimized for your application. The STF value to be achieved is defined by the European standardization: STF = min. 0.1 x LC and max. 0.5 x LC
All products in our assortment of cargo safety are tested according to DIN EN 12195-2. STF – Standard Tension Force according to DIN EN 12195-2, always applies to a lashing belt system (ratchet, webbing and end fittings). The
webbing, its length, composition, elongation, sewing and material thickness have a very large influence on the STF value of a lashing belt system. The STF value for pull- and pressure ratchets is given by us only for guidelinde.
| LC (Lashing Capacity) | STF min. | STF max. |
| 400 kN | 40 daN | 200 daN |
| 750 kN | 75 daN | 375 daN |
| 1000 kN | 100 daN | 500 daN |
| 1500 kN | 150 daN | 750 daN |
| 2000 kN | 200 daN | 1000 daN |
| 2500 kN | 250 daN | 1250 daN |
| 3500 kN | 350 daN | 1750 daN |
| 5000 kN | 500 daN | 2500 daN |
What is the SHF-Standard Hand Force?
The abbreviation SHF “Standard Hand Force” describes the force (50 daN) that must be applied to the ratchet lever according to the European standardization (DIN EN 12195-2) in order to determine the STF value for the system (ratchet, lashing strap and end fittings). This force is also called hand force – force of the user.
What is the LC-Lashing Capacity?
The value LC “Lashing Capacity” stands for the permissible lashing force. It indicates when the load limit for the lashing system in straight pull (direct pull) is reached. This value is determined from the breaking strength.
LC – direct pull
Example: Pressure Ratchet 50mm – 50kN
LC = 2.500 daN
two-piece lashing strap
– Ratchet– Loose end with end fitting
LC – strapping
Example: Pressure Ratchet 50mm – 50kN
LC = 5.000 daN
one-piece lashing strap
– Ratchet
two-piece lashing strap
If you have more questions, please contact us. tracy@chinatoplifting.com
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