Refer to FIGURE 2 for the depth requirements of a hearth extension. Hearth extension requirements vary according to where the floor joists meet the hearth and what local code requires.
FIGURE 4: INSIDE WALL PAD INSTALLATION
NOTES:
1.If installing a fireplace furnace on an inside wall, refer to FIGURE 4. An inside wall concrete pad must be six inches deeper than FIGURE 3 shows to allow for additional air space required for inside wall installation.
2.Overall concrete pad and hearth extension sizes can be determined by referring to FIGURE 3. Remember that a pad should contain rebar or steel mesh for stress reduction and improved strength.
3.All combustible ash pit forms should be removed before the concrete pad is poured, as removal will be impossible once the concrete pad has been poured.
Version 7.1 | 7 |
