Normal service is generally considered to be use under static or very modest dynamic load conditions. Design factors at the low end of the suggested range should only be selected with expert knowledge of conditions and professional estimate of risk, based on the critical conditions of use listed below. Loads are not accurately known. Operators are poorly trained. Operation and or use procedures are not well defined and or controlled.
Inspection is infrequent.
Abrasion, dirt, and cutting is present. Shock loads or extreme dynamic loadings are likely. High temperatures are present. Chemicals are present. Ropes are kept in service indefinitely.