3
S
UBMITTAL
R
ECORD
FOR
D
URA
S
TACK
M
ODELS
DCL,
DAS1,
DIS1,
DIS2
AND
DIS4
M&G
D
URA
V
ENT
|
10
J
UPITER
L
ANE
|
A
LBANY
,
N
EW
Y
ORK
www.duravent.com
PRODUCT WEIGHTS
The average weight of the duct, per foot of length, can be estimated using the
following formula:
DCL 0.40 X
Diameter
in
inches
= lbs per foot
DAS1 0.79 X Diameter in
inches
= lbs per foot
DIS1 0.93 X Diameter in
inches
= lbs per foot
DIS2 1.09 X Diameter in
inches
= lbs per foot
DIS4 1.44 X Diameter in
inches
= lbs per foot
Chimney design should provide adequate support to ensure components are not
overloaded.
THERMAL EXPANSION CALCULATIONS
Thermal expansion under normal operating temperatures can fatigue welds
causing leakage. It is necessary to calculate the thermal expansion between two
fixed points.
Formula: [Length (ft) / 100] x [Temperature Rise degrees F / 100]
Example
: [50’ / 100] x [75°F / 100] = 0.375” Expansion
If the computed expansions between the fixed points are greater than 0.375” -
DuraVent recommends an adjustable or bellow length be installed.
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
SECTION E-SUPPORTS
. Certain limitations apply for proper
installation of supports and guides. See
Tables 3, 4 and 5 and
Figures showing MVS and H.
4.
It is recommended to apply an exterior grade high heat paint to any
plate supports, full/half angle rings, wall supports/guides,
aluminized outer maximum corrosion protection against the elements.
(Ex: Rust-Oleum V200 series High Heat Industrial Aerosol)
NOTE:
All the weight of the section is supported by the inner flue.
Never support any chimney pipe from the outer casing.
TABLE
3
–
Height
Limits
for
each
Type
of
Support
Parts
Flue
Diameter
Ø
(in)
HEIGHT
(ft)
DCL
DAS1
DIS1
DIS2
DIS4
Anchor
Plate
5
to
22
264
133
114
97
73
24
to
36
161
82
70
59
45
Anchor
Plate
with
Length
5
to
22
281
142
121
103
78
24
to
36
172
87
74
63
48
Base
Supported
Tee
5
to
22
102
52
44
37
28
24
to
36
63
32
27
23
17
Wall
Support
5
to
22
105
53
45
39
29
24
to
36
64
32
28
24
18
WARNING
Do
not
attach
any
supports
to
combustible
Dimensions are in inches (diameter) and feet (distance)
