Entryway system and fire security

The project is a warehouse divided in two parts: storage and offices. For to achieve this credit it applies entryway system which have to be a special carpet of 3 meters long, continuous and permanent. One of this systems is put between the warehouse and offices, but this space is a hall for fire-security lower than 3 meters. The doors for acces at the hall are airtight and can't accept the carpet. Our question is: It is possible cut the carpet and separed it the space of this door for to comply of the fire-security regulation and achieve this credit? In other words, if we separe the carpet 3-4 cm in a point, it will be considerated continuous? Thank you.