Superior WRT2042WS - Page 10

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126631-01B
10
VENTING INSTALLATION Continued
Figure 11 - Elbow Offset
FIRESTOP SPACERS (3600FS-8DM-1)
Firestop spacers are required at each point where chimney penetrates
a floor space. Their purpose is to establish and maintain required
clearance between chimney and combustible materials. When pipe
passes through a framed opening into a living space above, firestop
must be placed onto ceiling from below as shown in Figure 12.
They also provide complete separation from one floor space to an-
other or attic space as required by most codes. When double wall
pipe passes through a framed opening into an attic space, firestop
must be placed into an attic floor as shown in Figure 13.
Figure 12 - Firestop Spacer with Living Space Above Ceiling
Figure 13 - Firestop Spacer with Attic Space Above Ceiling
Ifareaaboveisalivingspace,installrestop
below framed hole.
Ifareaaboveisanatticorinsulatedarea,install
firestop above framed hole.
PENETRATING ROOF
To maintain a 2" clearance to pipe on a roof with a pitch, a rectangular
opening must be cut.
1. Determinecenterpointwherepipewillpenetratetheroof.
2. Determinecenterpointoftheroof.Pitchisthedistancetheroof
dropsoveragivenspan,usually12".A6/12pitchmeansthatthe
roof drops 6" for each 12" measure horizontally down from roof
rafters.
3. Useroofopeningchart(Figure14,page11)todeterminecorrect
opening length and flashing required.
4. Removeshinglesaroundopeningmeasured.Cutoutthissection.
5. Addnextsectionsofpipeuntilendpenetratesroofline.Checktosee
thatproperclearancesaremaintained.Extendchimneybyadding
sections of double wall pipe until pipe is minimum of 30" above
highest point of roof cutout. Termination and chimney must extend
a minimum of 36" above highest point where it passes through
roof.
B
A
Screws
OFFSET RISE CHIMNEY LENGTH
A B 48" 36" 24" 18" 12"
4
3
/
8
" 16
3
/
8
"
ELBOW SET ONLY
9" 25
3
/
4
" 1
11
7
/
8
" 31" 1
15" 37
3
/
8
" 1
16
3
/
4
" 40
1
/
2
" 1 1
20" 47
1
/
8
" 1
22
5
/
8
" 52
1
/
8
" 1 1
25
1
/
2
" 57
7
/
8
" 1
27
5
/
8
" 62" 1 1
30
3
/
8
" 67
1
/
4
" 1 1
33" 72
5
/
8
" 1 1
35
3
/
4
" 78" 2
37
7
/
8
" 82" 1 1 1
41
1
/
4
" 88
5
/
8
" 1 1
43
3
/
8
" 92
3
/
4
" 2 1
46
5
/
8
" 99
3
/
8
" 2
48
3
/
4
" 103
1
/
2
" 1 1 1
51
1
/
2
" 108
7
/
8
" 2 1
54
1
/
4
" 114
1
/
8
" 2 1
57" 119
1
/
2
" 1 2
59" 123
5
/
8
" 2 1 1
61
3
/
4
" 129" 1 2 1
64
1
/
2
" 134
3
/
8
" 1 2 1
67
1
/
4
" 139
5
/
8
" 4