LC
Maximum force for use in straight pull that a web lashing is designed to sustain in use. According to EN 12195-2 samples must be tested during the production. During the tests the complete lashing strap must sustain 2 x LC force, while the webbing must endure 3 x LC force.
LC tie down
The maximal tie down force affecting the load while the lashing strap sustains the maximum allowed force. The representation of this value is not regulated by EN12195-2, however common speech refer it as the capacity of the lashing strap. For example a "5 ton" lashing strap has an LC value of 2500daN and LC tie down value of 5000daN.
SHF (standard hand force)
Hand operating force applied on the ratchet (50daN = ~50kg). The handle has to be operated with this force to generate the standard tension force in the strap.
STF (standard tension force)
Residual force in the strap after release of the handle of the ratchet. The longer the ratchet is, the stronger force in the strap generated.