Step 1. Use Offset Chart to determine amount of horizontal offset (A) and height (B) for various chimney section assemblies.
Step 2. Use “Height of Chimney Only” column in The Vertical Elevation Chart to determine combinations of chimney used above return elbow to achieve desired heights. Reference Components Effective Height Chart in vertical elevation chart section.
Step 3. Use Elevation Chart as job estimator only. Add necessary firestop spacers and stabilizers as required. Firestop spacers must be used as shown in Figures 21 and 22 and stabilizers as shown in Figure 27.
A1
A2
C2 | FTF10 Chimney |
B2
A1
B1
C1
Figure 38
6'
No
| 8m | ) | |
|
| ||
(1 |
| Required | |
Screws | for | First | |
| |||
Joints |
|
|
|
|
|
| 4' |
| in |
| Offset |
6' |
| of |
|
|
|
|
Joints
|
| ) |
| at |
|
|
|
|
|
| |
| 2m | Required | Past | 6' | |
|
|
| |||
(1 |
| Joint |
| ||
|
|
| |||
Screws |
|
|
| ||
|
|
|
| ||
| Every |
|
|
| |
No. 8 x ¹⁄₂" SMS
20' Max.
(6m)Stabilizer
A2
B1
C2
B2
10' Max.
(3m)
A1
B1
C1
Figure 36
Figure 37
12 | NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. |
Underside of Chimney
Figure 39
Return Elbow
FTF10 Chimney
Section (s)
A 
B
Offset Elbow 
65 ¹⁄₄"
(1657mm)
* Part of Offset/Return Package, Model
Figure 40