Fire-Prevention Sleeve, Use of the Fire-Prevention Sleeve, Method for Installing a Fire-Prevention Sleeve, and Ceiling Passage

In a ceiling passage with an opening through which a pipe extends in the vertical direction, the pipe being surrounded by a fire-prevention sleeve, the fire-prevention sleeve comprising:

• fire-prevention additives embodied in a rectangular strip, wherein a plurality of notches are provided along only one longitudinal side of the rectangular strip, wherein the plurality of notches are used to form flaps, wherein the flaps are formed at a bottom edge of the rectangular strip and are bent backwards, and wherein the flaps are supported at an inner wall of the ceiling passage near a bottom of the ceiling passage.

A method for installing a fire-prevention sleeve in a ceiling passage of a ceiling in which a pipe is located, comprising:

• arranging a fire-prevention around the pipe from above the ceiling;
• and
• forming flaps on an edge of fire-prevention sleeve facing the ceiling.