5
1/2" THICK
CONCRETE
BOARD
CLASS "A"
CHIMNEY
SEE FIG.
27 AND 28
SEE FIG. 26
2" AIRSPACE
CLEARANCE TO
COMBUSTIBLES
ON REAR AND
SIDES OF UNIT.
65"
28”
8” METAL
PLATFORM
1/2”
2”
Fireplace Framing Dimensions (Combustible Floor Systems)
57" I.D.
FRAMING
2" MIN*
2" MIN**
8 1/2"
* 2 INCH CLEARANCE TO COMBUSTIBLES BOTH
SIDES OF FIREPLACE
** If using a raised hearth or metal base plate, note that a
combustible wood header must be no closer than 2” to the top of
the dome top.
Figure 5 - Combustible Floor
20"
MIN
12"
MIN
12"
MIN
2" MIN
53"
*
Not provided as part of fireplace
Figure 6
- Non-Combustible Hearth Extension (by others*)
Figure 7 - Combustible Floor
ONLY NON-
COMBUSTIBLE
MATERIAL WITHIN
18” OF TOP OF
OPENING.