Fire protection steps are being installed to prevent potential fire spread through voids and spaces. A potential risk area are the internal vertical soil pipe runs, as these pass through the celing joist void and upstairs floor. A risk exists in a fire that the the heat causes the plastic pipe to collapse and leave a path for fire and smoke.To prevent this, pipe collars are being fitted at all opening points. These contain an intumescent material that swells in the heat and seals off the path. The complete pipe box carcass is clad in 2 layers of Fireline plasterboard for its entire length from sub-floor.