Step 2. Framing the Fireplace
Fireplace framing can be built before or after the fireplace is set in place. Framing should be positioned to accommo- date wall coverings and fireplace facing material. The dia- gram below shows framing reference dimensions.
CAUTION: MEASURE FIREPLACE DIMENSIONS AND VERIFY FRAMING METHODS AND WALL COVERING DETAILS BEFORE FRAMING.
WARNING: FRAMING DIMENSIONS ASSUME
!USE OF 1/2 INCH THICK WALL COVERING MA- TERIALS ON EXTERIOR OF FRAMING ONLY
AND NO SHEETROCK ON INTERIOR OF FRAMING.
Shows center of 10” x 10” vent framing hole. The center of the hole is one inch (25.4mm) above the center of the hori- zontal vent pipe.
371/8”
(943mm)
383/4
(984mm)
* 24 3/4 | 32 3/4 |
(62mm) | (831mm) |
|
Framing should be constructed of 2 X 4 lumber or heavier.
Figure 3. Framing Dimensions
4A. | Vertical Vent Runs |
|
| 1” (25mm) |
|
| PIPE CLEARANCE | |
| 4” | (102mm) |
|
| |
| 28 15/16” |
|
| (734mm) |
|
4B. Horizontal Vent Runs |
| |
| FIRESTOP |
|
|
| 1 1/2” |
|
| (38mm) |
|
| 36 1/8” |
| 26 7/16” |
|
| (671mm) |
|
Figure 4. | Vertical and Horizontal Vent Runs | |
*This dimension may need to be adjusted depending on the venting configuration. See Figure 4 for details. For vertical runs inside wall per Figure 4A, add 4 inches. For horizontal clearance to firestop per Figure 4B, add
10
