hot rail

[talgar]

Пожалуйста, помогите перевести.

Выражение встречается в следующем контексте:
Crane girder reinforcement is a challenging task for a design engineer because it involves not only a girder reinforcement design to meet strength and serviceability criteria, but such problems as downtime in the crane operationj to construct the reinforcement, interference with th eexisting structures and equipment and modofocations of elements arrached to the girder (walkways, hot rails, piping, electrical conduit support).

Заранее спасибо