Venting Installation |
| 2" (5.1cm) | ||
Continued |
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| Minimum | |
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Maximum length of pipe between supports |
| Angled Firestop | ||
is 6' of angle run. Maximum of two 6' angle |
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run sections per chimney system (see Figure |
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9, page 6). |
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| Ceiling | |
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| Support | |
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Support |
| Straps |
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30 FT. Required | 30 FT. | Return | ||
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(9.14m) | (9.14m) |
| Elbow | |
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Figure 17 - Chimney Supports
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| Return | |
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| Elbow | |
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| Figure 15 - Elbow Offset |
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| OFFSET | RISE | CHIMNEY LENGTH | ||||
| A | B | 48" | 36" | 18" | 12" | |
| 4 3/8" |
| 16 3/8" | ELBOW SET ONLY | |||
| 9 1/2" |
| 25 1/4" | 1 |
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| 12 1/2" 30 3/8" |
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| 1 |
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| 14 3/8" |
| 34" |
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| 2 |
| 17 5/8" 39 1/4" |
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| 1 | 1 | ||
| 21 1/2" |
| 46" | 1 |
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| 22 3/4" 48 1/8" |
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| 1 | 2 | ||
| 26 3/8" 54 7/8" | 1 |
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| 26 3/8" |
| 60" | 1 | 1 |
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6' Max. (15.2 cm)
6' Max. (15.2 cm)
6' Max. (15.2 cm)
6' Max. (15.2 cm)
6' Max.
(15.2 cm) 6' Max.
(15.2 cm)
31 3/4" 63 3/4" | 1 |
| 1 |
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34 3/4" | 69" | 1 |
| 1 |
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38 5/8" 75 5/8" |
| 2 |
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39 7/8" 77 7/8" | 1 |
| 1 | 1 | |
43 3/4" 84 1/2" | 1 | 1 |
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46 3/4" 87 3/4" |
| 2 | 1 |
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48 7/8" | 93 3/8" | 2 |
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OFFSET CHART
Screws
B
A
Figure 16 - Rise and Offset
Figure 18 - Typical Offset Installations
Firestop Spacers
Firestop spacers are required at each point where the chimney penetrates a floor or ceiling joist space. Their purpose is to establish and maintain the required clearance between the chimney and the combustible materials.
When penetrating a floor or ceiling at an angle, use firestop spacer number
When the pipe passes through a framed opening into a living space above, the firestop must be placed onto the ceiling from below as shown in Figure 19, page 9. When the pipe passes through a framed opening into an attic space above, the firestop must be placed on the attic floor as shown in Figure 20, page 9.
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