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3.4.1. Floor Level and Raised Fireplace Openings
O
W
O
H
OD
H
W
H
D
50mm
Figure 39
O
W
O
H
OD
H
W
H
D
50mm
Figure 40
Min Max
55BOH 540mm 575mm
56BOW 365mm 465mm
57BOD 115mm (min)
58BHW A minimum of 150mm
either side of any
incandescent material
HD Must project a
minimum of 300mm in
front of any naked
flame or incandescent
material
Table 3
Other dimensions are dependent on flue
construction and fireplace design; therefore,
please refer to Section
X3.2X and Section X3.3X.
Hearth Construction: The hearth material must be non-combustible and a
minimum of 12mm thick, when laid on the floor, a 50mm upstand above the
finished floor level must be created.