
Optional
Fire Code Sheet Rock
And Metal Fire Stop
2 In. |
Min. |
TOPPER
STORM COLLAR
ROOF FLASHING
TRIPLE WALL PIPE
CAUTION: Refer to chim- ney manufactures instruc- tions for assembly and disas- sembly of chimney parts. Be sure to follow chimney instructions for proper clear- ances to combustibles and proper air spacing required.
Ceiling
NOTE: Follow building and fire codes for each indi- vidual state.
15FT. |
MAX. |
NBC |
RADIATION |
SHIELD |
Chase |
Enclosure |
2 “X 4” STUDDING
USE FIRE CODE SHEET ROCK
NBC METAL FIRE STOP RADIA-
TION SHIELD
2”X 4” STUDDING
A SINGLE HEADER MUST BE
INSTALLED ABOVE CABINET
34 5/8”
THESE MEASUREMENTS
ARE CRITICAL
37 15/16”
17”
WARNING: Install the hearth protec- tor only as specified. The hearth exten- sion must extend a minimum of 17” in front of the fireplace opening and must be 37 15/16” wide minimum.
FIGURE 10 | CHASE ENCLOSURE AND CORNER LOCATION FRAMING |
7.Next construct the hearth extension out of
a)The hearth extension must extend 17” in front of the rough framed opening on the ZC20.
b)The hearth extension width must be at least 37 15/16”.
c)The hearth extension must be made of brick 2” thick, a listed “Hearth Extension” or “Floor Protector”, or a hearth extension made of
K = 2.5 BTU ((HR) (ft2) (oF/in.))
ALTERNATE FLOOR PROTECTORS MATERIALS
With the floor protector or hearth extension material specified as one layer of 2” thick brick with a K* factor of 5.0, you may use alternate materials as long as the K* factor (s) is calculated as follows:
Formula: Required thickness = (K of alternate material/K of millboard) X (thickness of millboard)
Example: An alternate inorganic
Required thickness = .9375.0o x 2 inch = 3/8 inch