Astria.us.com
125160-01_D
26
12 inch
rebar or
all-thread
Dome Top (MFP33-9) Center of chimney hole is offset
towards the rear. Position marker towards front as shown.
Dome Sides
MFP33-8
Upper Domes
MFP33-10
Figure 42 - Adding Rebar (
MFP-39/44/49)
FIREPLACE INSTALLATION
Continued
14. MFP-39/44/49:
After the third row of firebox is complete,
place #3 rebar (36” long) vertically through the cells until they
reach bottom. Position them adjacent to the rebar or all-thread
sticking up from the hearth. Figure 42.
15. Install Downdraft Diverter and final row of Side Walls (Figure
43). All components must be level. Mix approx. 2 cu. ft. of
Ready-Mix Concrete. Insert 28” rebar vertically through the
cells, into the holes in the hearth, adjacent to the rebar and/or
all-thread sticking up from the hearth. Fill all cells with Ready-
Mix Concrete mix.
Figure 41 - Assembling Upper Dome for (MM33 only)
Add rebar to cells
and fill with mortar.
Lower Rear Dome
Lintel
Lintel
Front
T-Bar
Figure 43 - Attaching Downdraft Diverter and Side walls
(
MFP-39/44/49)
Figure 44 - Attaching Lintel and T-Bar (
MFP-39/44/49)
Downdraft Diverter
(Smoke Shelf)
16. Set the Lintel, T-Bar, Lintel Front and Lower Rear Dome as
shown in Figure 44. Check that all is level. If adjustments are
needed, use shims and fill gaps with an appropriate amount of
mortar.
Note:
Although you are cautioned to use mortar sparingly
because it does have such holding power, you should look over
the firebox assembly at the end and fill in any gaps, especially
joint connections, with the mortar.
Important:
Adjustments can only be made while the mortar is
still wet when correcting for squareness and leveling.
17. Assemble Lower Dome Sides as shown in Figure 45, page 27.
The beveled face lines up with the inward angles of the lintel
sides. Resulting top surfaces should be level.
