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3.4.1. Floor Level and Raised Fireplace Openings
OW
O
H
OD
HW
HD
50mm
Figure 39
OW
O
H
OD
HW
HD
50mm
Figure 40
Min
Max
55B
OH
540mm 575mm
56B
OW
365mm
465mm
57B
OD
115mm (min)
58B
HW
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
X
3.2
X
and
Section
X
3.3
X
.
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.
