Fire Rated Systems

Ducts, dampers & transits · Transit changes

Can new cables be added to an existing cable transit?

Short answer

Often, where the specific system, its capacity and the proposed service arrangement support the change. Adding cables beyond what the evidence covers turns a maintainable transit into an undocumented penetration.

What to do next

Send the tag, the schedule reference, the drawings you have and photographs of the actual condition. We will tell you what they show, what they cannot, and what else is needed before anyone gives a conclusion.

General information only. A conclusion about a specific condition requires the actual construction, the evidence behind it and the site condition to be reviewed.