Author Archives: Mike Tobias

The Cable Installer Must Reseal the Firewall There are safety codes that must be followed when dealing with cable installations and physical fire barriers (firewalls). Firestopping rated firewalls after cable…

After a 25-year career in the cabling business, I had the exciting opportunity to develop some mechanical penetration systems for cable installers. During the development of these systems, I was…

Packing (eliminated for 1 or 2 hr. Systems) Listings with 3-M, Hilti, Rectorseal and Nelsons all require a minimum of 1 inch of mineral wool batt insulation, packed tightly, into…

The first letter of the listing designation identifies the type of penetrated fire-rated structure: C for both floor and wall penetrations F for floor penetrations only W for wall penetrations…