<p>A fire collar including: a housing having an outer wall defining a passage having an upper end and a lower end; heat reactive blocking means in said housing and arranged to expand so as to substantially block said passage upon reaching a predetermined temperature; and securement means in said passage, said securement means being operatively connected to said outer wall so as to substantially inhibit undesired lateral movement of said outer wall relative thereto and being adapted to receive therethrough a fastening screw coaxial with said passage and extending therethrough for fastening the fire collar in a predetermined position to formwork on or against which it is placed.</p>
