7
Vermont Castings Stratton
30004508
planning information
In planning a chimney system, it is important to know:
1. The height of a chimney is measured from the hearth
to the exit point on the termination.
. A chimney cannot be offset more than 30° from a
vertical plane.
3. A chimney may run straight up or it may be neces-
sary to offset it to avoid obstructions.
4. The maximum length of an angled run (total chimney
system) is 0 feet.
5. No more than offsets (4 total 30° elbows in U.S./or
total 45° elbows in Canada) per fireplace may be
used.
6. A guy wire stabilizer is required for chimneys extend-
ing more than 6’ (1.8 m) above a roof line.
The Ten Foot Rule
The majority of U.S. building codes specify a minimum
chimney height above the roof top. The “Ten Foot Rule”
is a fire safety rule rather than a rule to ensure proper
draft. To ensure proper draft, it is recommended that
you always meet or exceed the “Ten Foot Rule,” espe-
cially when installing a termination on a high pitch roof.
(Fig. 6)
The key points of the “Ten Foot Rule” are:
1. If the horizontal distance from the chimney to the
peak of the roof is 10’ (3 m) or less, the top of the
chimney must be at least ’ (610 mm) above the
peak of the roof, but never less than 3’ (914 mm)
in height above the highest point where it passes
through the roof.
. If a horizontal distance from the chimney to the peak
of the roof is more than 10’ (3 m), a chimney height
reference point is established that is on the surface
of the roof a distance of 10’ (3 m) from the chimney
in a horizontal plane. The top of the chimney must be
at least ’ (610 mm) above the reference point, but
never less than 3’ (914 mm) in height above the high-
est point where it passes through the roof.
2' Min.
2' Min.
3'
Min.
0 To 10'
3'
Min.
0 To 10'
AC246
4/1/96
Reference
Point
AC46
Fig. 6
Ten Foot Rule illustration.
Planning an installation is very important to ensure
safety and to save time and money. An installer must
predetermine where a fireplace will be set and plan how
the chimney system will be run.
Also, when planning your installation, consider finishing
materials you will be using for hearth and walls.
what to consider:
1. The fireplace bottom must be flush with the top of
the material used for the hearth.
. If you are using a thick stone or brick, you may
want to consider mounting the firebox further out to
achieve the amount of inset from the stone face to
the unit face.
3. Be sure to follow all safety guidelines described in
this manual when choosing the materials for con-
struction.
Mounting the Fireplace
The fireplace is shipped with lifting handles attached to
each side with steel straps.
NoTe:
The lifting straps are
intended for lifting the fireplace from the skid and final
positioning. The fireplace should remain on the skid
until final positioning. After the fireplace is in position,
the lifting handle and straps may be removed or left in
place.
A fireplace may only be mounted on the following sur-
faces:
1. A flat combustible surface.
. A raised wooden platform.
3. A concrete block or other solid object placed beneath
each of the four (4) corners of the fireplace.
The fireplace
must
be spaced 1/” (13 mm) from a
combustible back wall and 1/” (13 mm) from a com-
bustible side wall or support. (Page 15, Fig. )
planning the chimney Run
L1
L1
LT
TOTAL
LENGTH
(LT)
INSTALLED
LENGTH
(L1)
56O
"
56O
"
56O
"
56O
"
56O
"
56O
"
56O
"
56O
"
FP288A
MBUF-INSTALLED LENGTH
Triple wall
1/28/99 djt
TRIPLE
WALL
81
818
83
84
Fig. 5
Installed lengths of chimney sections.
ToTal
iNSTalleD
DoUble
leNgTh
leNgTh
wall
(l
T
)
(l
1
)
SK81
11
Z\x
”
10
Z\x
”
SK818
17
Z\x
”
16
Z\x
”
SK83
35
Z\x
”
34
Z\x
”
SK84
47
Z\x
”
46
Z\x
”
FP88a
Determine how the chimney will be run, the length of
the run and the chimney components required to com-
plete the job. (Fig. 5)
Never
install a chimney below the
minimum heights specified in this manual.
