
Fig. 7
2.3.2
The opening needs to be sufficient to accomodate the combustion
chamber. To support the wall above the opening, a suitable lintel must
be inserted across the top of the opening. The lintel could be either
pre-cast concrete or steel - Catnic CN52 or CN 46 could be used,
depending upon the inner wall thickness. Before proceeding with the
installation of the fire, an assessment of the area immediately above the
fire is required, see figure 7 above. If there is no existing openings
within either triangle, proceed with forming the opening. However, if
opening or beams occur within either triangle, then you should seek
specialist advice from a structural engineer or consider relocating the
proposed position of the firebox.
10
400mm interactive area
600mm load triangle
The Interactive Zone -
Openings, beams or joists within
this area need to be assessed.
Load triangle - No beam or
opening permissible within this
area
Lintel
e.g. 750mm x 75mm
Proposed Opening in
Chimney Breast