Isokern Magnum 28, Инструкция по установке, эксплуатации, обслуживанию и руководство владельца

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BRICK
LEDGE
51
DM 54 Chimney System: Brick Ledge Installation
DM 54 Brick Ledge Installation:
Use of the brickledge will require a roof framing rough
opening of at least 34” in width. The required opening dimension
along the length of the rafter, where the chimney is to penetrate the
roof line, will increase above 34” relative to the pitch of the roof.
As the DM 54 outer casing and inner liner assembly
approaches the roof penetration set an outer casing block to a level
of approximately 6” below the low side of the roof framing. (Figure
105)
The alignment tongues on the top of this outer casing block
must be ground off to leave a flat contact surface for the brickledge.
Temporarily leave out the inner liner that fits this outer casing block.
Set the Isokern brickledge onto the flat top surface of the
outer casing in a full bed of Earthcore Mortar. Be sure to align the
four 2-1/2” holes in the brickledge with the matching holes in the
outer casing block below it. Return to setting the next inner liner
in the sequence. This inner liner comes up from below and passes
through the octagonal hole in the brickledge. The liner’s top end will
be approximately 3” above the top surface of the brickledge.
Set the next outer casing block onto the top of the brickledge in a
bed of Earthcore Mortar.
Insert one piece of #4 (minimum) steel reinforcing rod into
each of the four 2-1/2” holes in the brickledge. The reinforcement
rods must start from a depth of at least 18” below the bottom of the
brickledge. (In some cases, a minimum reccommendation could be
5’)
Consult local structural engineer for proper job-specific
support structure design, sizing and load bearing specifications.
If short lengths of steel rods are used be sure to properly lap
and wire tie all splices in the rebar. As the reinforcing progresses,
completely fill the holes with grout. Suitable grout can be a pourable
mixture of Portland cement and sand or Portland cement, sand and
pea gravel. The rebar must be fully embedded in grout.
Leave enough of the #4 steel reinforcing rod exposed above
the brickledge so that as the stacking of outer casing blocks continues
to termination the reinforcing rods and grout can continue through
the stack. Reinforcing shall continue to chimney termination.
All DM 54 chimneys that include the DM 54 brickledge
must be reinforced as described above.
CAUTION: When using the Isokern brickledge it is required
that the MAGNUM firebox/smoke dome assembly include the
placement of a 4” by 4” by 3/8” minimum steel angle across the
firebox opening. (See page 55 for “Structural Information” for
details regarding specification and placement of steel angles in
MAGNUM fireplaces.)
Lateral Support for Isokern Brickledge Chimneys:
Once the DM 54 chimney and brickledge are assembled
and after the intended masonry veneer has been installed on the
brickledge, be sure to brace the chimney following the guidelines
on page 45 of this manual for Lateral Support of DM 54 chimneys.
FIGURE 102
FIGURE 103
FIGURE 104