Installation
* MVS = Maximum Vertical Spacing between two guides or a support and
a guide in a vertical position.
** H = Maximum freestanding Height above the roof.
*** MHS = Maximum Horizontal Spacing between two guides or a support
and a guide is 12 feet.
THERMAL EXPANSION
Good installation practice requires that any length of exhaust system
between two fixed points subject to more than 1/4 inch expansion must
have an Adjustable Length (LA) or Bellows Joint (LB) to compensate
for expansion. Models DIS and DAS will expand approximately 1 inch
for every 100°F temperature rise per 100 feet of chimney. To accom-
modate chimney movements, any wall guide or floor guide must be
located away from the locking band.
It is essential that these parts be properly installed and provided with
adequate support and guidance to prevent binding or excessive bend-
ing forces. (See detailed installation information contained on page 19,
Thermal Expansion).
6
SUPPORT METHODS AND HEIGHT LIMITS
1. Several support and guiding methods are used to anchor a chimney
against upward, downward and angular displacement.
2. These supports and guides used with thermal expansion devices,
prevent bending stresses on the chimney elbows and joints.
3. Supports and guiding methods and installation are described in Sec-
tion C. Certain limitations apply for proper installation of supports
and guides. See tables 6 and 7.
NO T E : Wh e n the
maximum height from
table 6 is exceeded, re-
support using another
support and expansion
joint.
Figure 6 - Maximum chimney heights and support
“ M V S ” d i m e n -
sion see table 7 for
Maximum Vertical
Spacing between two
guides or a support
and a guide.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
SUPPORT AND GUIDE SPACING FOR MODEL DIS AND DAS
Inside
Diameter (in)
MVS*
H** MHS***
Interior Exterior
5 10 8 10 12
6 10 8 10 12
8 10 8 10 12
10 10 8 10 12
12 10 8 10 12
14 10 8 10 12
16 10 8 10 12
18 10 8 10 12
20 10 8 10 12
22 10 8 10 12
24 10 8 10 12
26 10 8 10 12
28 10 8 10 12
30 10 8 10 12
32 10 8 10 12
34 10 8 10 12
36 10 8 10 12
Table 7
- Dimensions are in feet
See Dim. “H” figure 7
and Chimney Guying
and Bracing in this
section.
Maximum
height - See
table 6
MVS
MVS
MVS
Termination
Storm collar (SC)
Roof support (RS)
Wall guide (WG)
Floor guide (FG)
Wall support (WS)
MAXIMUM CHIMNEY HEIGHTS AND SUPPORT METHOD FOR MODEL DIS AND DAS
Inside
Diameter
(in)
Anchor
Plate
(AP)
Anchor Plate
with Length
(APL)
Ventilated
Anchor Plate
(APV)
Wall Support (WS)
Tee
(T)
Metal Frame Only
Metal Frame
OR Wood
Frame
Metal
Frame
Wood
Frame
DIS/DAS
DIS DAS
DIS/DAS DIS/DAS
DIS/DAS
5
147
200 200
133 147
61 105
6
128
200 200
116 128
53
92
8
103
200 200
93 106
43
74
10
86
177 200
78 86
35
61
12
73
152 194
66 73
30
53
14
64
133 175
58 64
27
46
16
57
118 146
52 57
24
41
18
53
106 135
48 53
22
38
20
48
97 125
43 48
20
34
22
44
89 117
40 44
18
31
24
37
76 92
34 37
15
27
26
35
71 88
32 35
14
25
28
33
66 83
30 33
13
23
30
31
63 76
28 31
13
22
32
29
59 73
26 29
12
21
34
27
56 70
25 27
11
20
36
26
53 65
23 26
11
18
Table 6 - Dimensions are in feet