20
53D9025
CHIMNEY HEIGHT AND OFFSET CHARTS
Intermediate
Height
Sections
(Inches)
1”
1
¹⁄₂
’
3’
4’
35
0
0
1
0
39
2
1
0
0
47
0
0
0
1
52
0
1
1
0
58
1
0
0
1
64
0
1
0
1
70
0
0
2
0
75
1
1
0
1
82
0
0
1
1
87
0
1
2
0
94
0
0
0
2
99
0
1
1
1
105
0
0
3
0
111
0
1
0
2
117
0
0
2
1
122
0
0
2
1
129
0
0
1
2
134
0
1
2
1
141
0
0
0
3
146
0
1
1
2
152
0
0
3
1
158
0
1
0
3
164
0
0
2
2
169
0
1
3
1
176
0
0
1
3
181
0
1
2
2
188
0
0
0
4
193
0
1
1
3
199
0
0
3
2
205
0
1
0
4
211
0
0
2
3
216
0
1
3
2
223
0
0
1
4
228
0
1
2
3
235
0
0
0
5
240
0
1
1
4
246
0
0
3
3
252
0
1
0
5
258
0
0
2
4
263
0
1
3
3
270
0
0
1
5
275
0
1
2
4
282
0
0
0
6
287
0
1
1
5
293
0
0
3
4
293
1
0
0
6
305
0
0
2
5
310
0
1
3
4
317
0
0
1
6
322
0
1
2
5
329
0
0
0
7
334
0
1
1
6
340
0
0
3
5
346
0
1
0
7
352
0
0
2
6
357
0
1
3
5
364
0
0
1
7
369
0
1
2
6
376
0
0
0
8
Elbow
Chimney Sections
Total In.
Set
1’
1
¹⁄₂
’
3’
4’
Offset
1
0
0
0
0
4
¹⁄₂
17
1
1
0
0
0
10
26
¹⁄₂
1
0
1
0
0
13
31
³⁄₄
1
2
0
0
0
15
¹⁄₂
36
1
1
1
0
0
18
¹⁄₂
41
¹⁄₄
1
0
0
1
0
22
47
¹⁄₄
1
2
1
0
0
24
50
³⁄₄
1
0
0
0
1
28
57
³⁄₄
1
0
1
1
0
30
¹⁄₂
62
1
1
0
0
1
33
¹⁄₂
67
³⁄₄
1
0
1
0
1
36
¹⁄₂
72
¹⁄₂
1
0
0
2
0
39
¹⁄₂
77
¹⁄₂
1
1
1
0
1
42
82
1
0
0
1
1
45
¹⁄₂
88
1
0
1
2
0
48
92
¹⁄₄
1
0
0
0
2
51
¹⁄₂
98
¹⁄₂
1
0
1
1
1
54
102
³⁄₄
1
0
0
3
0
57
107
³⁄₄
1
0
1
0
2
60
113
¹⁄₄
1
0
0
2
1
63
118
¹⁄₄
1
0
1
3
0
65
¹⁄₂
122
¹⁄₂
1
0
0
1
2
69
128
³⁄₄
1
0
1
2
1
71
¹⁄₂
133
1
0
0
0
3
75
139
¹⁄₄
1
0
1
1
2
77
¹⁄₂
143
¹⁄₂
1
0
0
3
1
80
¹⁄₂
148
¹⁄₂
1
0
1
0
3
83
¹⁄₂
154
1
0
0
2
2
86
¹⁄₂
159
1
0
1
3
1
89
163
¹⁄₄
1
0
0
1
3
92
¹⁄₂
169
¹⁄₂
1
0
1
2
2
95
173
³⁄₄
1
0
0
0
4
98
¹⁄₂
180
1
0
1
1
3
101
184
¹⁄₄
1
0
0
3
2
104
189
¹⁄₄
1
0
1
0
4
107
194
³⁄₄
1
0
0
2
3
110
199
³⁄₄
1
0
1
3
2
112
¹⁄₂
204
1
0
0
1
4
116
210
¹⁄₄
1
0
1
2
3
118
¹⁄₂
214
¹⁄₂
1
0
0
0
5
122
220
³⁄₄
Note For Straight Run Chimneys:
Chimney support required at 25’ chimney height.
Notes For Chimneys With Elbow Offsets:
The length of the inclined portion of the chimney between elbows must
not exceed 6 feet when unsupported, or 20 feet if the chimney is sup-
ported at 6 foot intervals using either metal support straps or an LCS
chimney support.
The LCS chimney support when installed at a 30 degree angle will
add 8” of rise and 4-5/8” of offset to the chimney height calculations.
