Assembly Instructions - 72”
The MAGNUM Model 72 is a custom unit made of standard parts
that are cut and tted together in the eld. The following cut and
assembly instructions identify the parts by name and by part num-
ber, the quantity required, the eld cut dimensions for each modi-
ed 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 infor-
mation and instructions).
Step 1: Base plate, Part M91, two required . These pieces are used
“as is”, without any eld cutting required.
Set the four M91 base plate components on an appropriate
masonry foundation and positioned exactly where the rebox 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 mea-
sure 85 1/2” and 28” inches deep.
Step 2: Side wall, part M60, eight pieces required, used “as is”.
The rebox side wall components are used without modi-
cation. 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 rebox side wall components will be
assembled in conjunction with the rebox back wall components
described in the following steps.
Step 3: Back wall, part M67, eight pieces required, four pieces to
be “eld modied”.
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
“eld modied”.
Cut one end of each of the four M67 back wall compo-
nents. 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 rebox by setting a 38 1/2”
M67 Back Wall (from Step 3) on the base plate with its tongue end
interlocked into the rebox side wall positioned at the end of the
base plate (Figure 50).
The square cut end of this 38 1/2” M67 back wall compo-
nent should sit ush with the back of the base plate with its cut end
past the centerline butt joint in the base plate arrangement
(Figure 50).
Next set the 34-1/2” inch cut M67 piece so that its tongue
end interlocks with the side wall component at the opposite end of
the base plate.
The square cut end of the 34-1/2” M67 should make a
snug butt joint with the square cut end of the 38 1/2” M67 compo-
nent (Figure 51).
26
FIGURE 46
FIGURE 47
FIGURE 48
FIGURE 49
FIGURE 50
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