85 ½
”
85 ½
37
37
¾”
38 ½
”
Assembly Instructions - 72”
The MAGNUM Model 72 is a custom unit made of standard
parts that are cut and fitted together in the field. The
following cut and assembly instructions identify the parts by
name and by part number, the quantity required, the field cut
dimensions for each modified component and the placement
of each part in the assembly.
Note:
At all component placement, be sure to mortar all
contact surfaces with Earthcore Mortar. Check for complete
sealing of each contact joint while assembly progresses (see
“General Isokern Assembly Instructions” on page 14 of this
manual for mortar information and instructions).
Step 1:
Base plate, Part M91, two required . These pieces are
used “as is”, without any field cutting required.
Set the four M91 base plate components on an
appropriate masonry foundation and positioned exactly where
the firebox is to sit. Set the two pieces so that the centerline
of the grouping is a butt joint (Figure 46). This makes for
square ends at both the left and right ends of the grouping.
The overall length of the base plate assembly should measure
85 1/2” and 28” inches deep.
Step 2:
Side wall, part M60, eight pieces required, used “as
is”.
The firebox side wall components are used without
modification. The side wall pieces stack four high on both the
left and right hand ends of the base plate arrangement (Figure
47)
The stack of four firebox side wall components
will be assembled in conjunction with the firebox back wall
components described in the following steps.
Step 3:
Back wall, part M67, eight pieces required, four
pieces to be “field modified”.
Cut the tongue off one end of each of the four M67
back wall components. After cutting, each of these four
cut pieces should measure 38 1/2” from the cut end to the
shoulder of the un-altered end (Figure 48).
Step 4:
Back wall, part M67, four pieces required, to be
“field modified”.
Cut one end of each of the four M67 back wall
components. These four cut pieces should measure 34-1/2”
from the cut end to the shoulder of the un-altered end (Figure
49).
Step 5:
Build the MAGNUM Model 72 firebox by setting
a 38 1/2” M67 Back Wall (from Step 3) on the base plate
with its tongue end interlocked into the firebox side wall
positioned at the end of the base plate (Figure 50).
The square cut end of this 38 1/2” M67 back wall
component should sit flush with the back of the base plate
with its cut end past the centerline butt joint in the base plate
arrangement
(Figure 50).
26
FIGURE 46
FIGURE 47
FIGURE 48
FIGURE 49
34 1/2”
FIGURE 50
