Normal service is generally considered to be used 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. Small ropes are used, because they can be more severely damaged by cutting, abrasion and sunlight. Loads are not accurately known. Operators are poorly trained.
Inspection is infrequent.
Abrasion, cutting, dirt are present. Shock loads or extreme dynamic loadings are likely. High temperatures are present. Chemicals are presents. Ropes are kept in service indefinitely.