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OFFSET ELEVATION CHART
TFlOChlmnq
*lion
TFIO-El0
Return
Elbow
A
O f f s e t
Ilnches)
9.1
r2.i
l l s ' z
7
20'2
21.' .
22'1
25'*
26
,/s
28'4
2 9 ~ .
3ia'l
31'1
3 7 ' i
36%
10
4 2 ' 4
13'1
46
46'L
49
52
55
55"
57%
61
62.' .
651%
67"a
7 0 . 4
73'1
75"r
79%
82'..
B l i i
67'4
BO'i
93
96'1
99'1
102
( 0 5
108
'10'.
!I'
I 1 7
119''.
Figure 40
NOTE DIAGRAMS d
ILLUSTRATIONS NOT TO SCALE
1
SPECIAL
OFFSET
INSTRUCTIONS
0
H e i g h t
(Inches)
'5
24
2 9 ' i
33%
36%
Q"r
45
4 7 %
52'j.
54
58
59.;
63
6 8 %
, , , .
A
743.
7
'
8 1 .
63'.
5 7 ' i
59
93
96'4
103'.
104%
(07%
113''.
l r 6
121
121'r
130
135'1
139'-
145'4
150"
154ia
159'1
165
$69
175'/2
180%
184%
189%
195
198,<
201?1
210'h
2l4"r
Toclearanyoverheadobs~dion~~youmayokd
3
yourchimney system usingSupeiur30"offsetand
relum elbows. Use two ebows
-
an offset elbaw la
initiate the olfsel and a return elbowtoterminateit.
The offset and return elbows may be attached t e
gether, or a section or sections olchimney maybe
used between,
but
do not exceed
(6.1 m) in total
length between elbaws.
I f
smions of
pipe
exceed
10'(3m)
between elbom,achimney stabiiizermusl
be used at the midpoint. The stabilizer supporl
A
O l t s a t
(mm)
102
235
311
366
"5
521
540
576
654
673
730
7n9
806
883
P59
918
I016
1013
1113
1188
,187
1245
1321
1397
7416
1454
1549
1581
1657
1775
1791
1867
1924
2079
20089
2153
2229
2305
2362
2487
2534
2591
2667
2
7
2600
2896
2972
3024
straps must be anached under tension (in shea)to
s l ~ c t u r d lramino members above. Whenhuosets
of offsel eibows are used.lhe maximum combined
length of chimney used between elbows cannot
exceedM'(6.1m) (Figore42). Example: IfC,= 10'
(3m) then C,cannot exceed 10' (3m).
A 30°
onset
elbow, angling in any direction, may be the lirst
piece of flue pipe on the ly ol the irepiace flue
milar.
8
n e i g h 1
(mm)
431
620
713
245
976
1105
1143
lZOi
1340
1372
1473
1505
1600
1134
1661
1699
1962
2064
2127
2229
2261
2362
2696
2623
2661
2724
2B69
a n 6
1073
3:59
J502
3435
3537
3696
3829
3931
4058
4191
4293
4458
4585
d6086
a820
1953
5048
5163
53a7
5MB
Maximum offset ofthe chimney system in the U.S.
is 30' . In Canada. the maximum offset is
45' .
See
the Canadian installation addendum for spedfic
information. Two offset elbows must not
be
as-
sembled to lorm a m o offset. However, Iwosets of
offsel and return elbows mav
b
used on a sinaie
TFlD30
10'
O l l s s t
Elbow
1
1
1
f
f
1
1
I
1
1
1
1
1
1
I
1
1
lluesystem, provided thetold height ofthe syslem
exceeds 25 (7.5m).
>
./
Retum elbow support straps must be s w r d y
attached underternion (inshear)tostnrclumlfram-
ing members above.
OFFSET CALCULATIONS
TFi0E30
1 0 "
Ralurn
Elbow
1
1
1
1
I
1
I
I
1
1
1
1
1
t
1
1
1
1
1
!
1
1
I
1.
UseOflset CharttodetermineamwnloIhorizon-
tal
olbet
(A)
and
height (8)
I M
various chimney
TFiO
12"
Flue
L e n g t h
-
-
2
-
-
2
-
-
2
-
-
2
1
-
-
2
-
-
2
-
2
-
2
1
-
2
-
2
-
2
1
-
2
-
2
10.S)
!Om
Stablllzer
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
t
f
1
1
1
1
1
1
2.
Use
' H eight of
Nue
OnV cdumn to determine
ombinations d p i p used
axwe r
m
dbow
to
achieve desired hei g hts.. Reference Components
Evedive Height Chatl in verlid &vation
chart
section.
3. Use Elevation Charl
as
job estimator mly. Add
necessafy lirestop spacers and stabiliuers
as
r e
quired. Firesty spacers mud be used as shown in
Figums
25 and
26 and stabilizers as shown in
Figure
30.
TFlO
18.
Flue
L s n g l h
-
-
-
2
-
2
-
3
-
2
-
-
3
-
2
-
-
-
-
2
-
-
2
-
-
2
-
-
TFiO
38.
Flue
L e n g t h
-
-
-
-
-
-
-
-
1
-
2
-
2
1
2
2
2
2
3
2
I
1
3
3
I
3
3
4
5
5
5
5
5
5
6
6
6
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