Depending on the ambient conditions (ambient temperature, sunrays, etc.) as well as the possible thermal discharge (dirt, accumulated heat, etc.)
3)
X-model series with load bearing capacity of 1,000 kg or greater: with mechanical load limiting device; X-model series up to 1000 kg load carrying capacity:
4)
mechanical or electric load limiting device can be supplied as an option. T-Model series: electric load limiting device can be supplied as an option.