With the placement of the machinery and
forming of the building panels in progress, your next
considerations are the placement and the
weight-lifting capabilities of the crane. Check the
weight-lifting chart of the crane for its maximum
weight capacity. This dictates the number of panels
you can safely lift at the operating distance. As with
all crane operations, attempting to lift more than the
rated capacity can cause the crane to turn over.
Attaching the spreader bar (fig. 8-16) to the curved
formed panels is a critical step; failure to clamp the
panel tightly can cause the panels to slip and fail with
potential harm to personnel and damage to the panel.
With guide ropes attached (fig. 8-17) and personnel
manning these ropes, lift the panels for placement.
When lifting, lift only as high as necessary, position
two men at each free end to guide them in place, and
remind crew members to keep their feet from under
the ends of the arches. Never attempt lifting any sets
of panels in high winds.
Place the first set of panels on the attaching angle
of the foundation, and position them so there will be
room for the end-wall panels. After positioning the
first set of panels, clamp them to the angle, plumb with
guide ropes, and secure the ropes to previously
anchored stakes. Detach the spreader bar and continue
to place the panel sets. Seam each set to standing
panels before detaching the spreader bar.
After about 15 panels (three sets) are in place,
measure the building length at both ends (just above
forms) and at the center of the arch. This
measurement will seldom be exactly 1 foot per panel
(usually slightly more), but should be equal for each
panel. Adjust the ends to equal the center measure.
Panels are flexible enough to adjust slightly. Check
these measurements periodically during building
construction. Because exact building lengths are
difficult to predict, the end wall attaching angle on
the finishing end of the building should not be put
in place until all of the panels are set.
After arches are in place, set the longest end-wall
panel in the form, plumb, and clamp it in place. Work
from the longest panel outward and be careful to
When all of the building panels are welded to the
attaching angle (fig. 8-18) at 12 inches on center, you
are ready to place the concrete. When you are placing
the concrete, remember it is extremely important that
it be well-vibrated. This action may eliminate voids
under all embedded items. As the concrete begins to
set, slope the top exterior portion of the concrete cap
about 5 inches (fig. 8-19) to allow water to drain away
from the building. The elevation and type of the
interior floor are not relevant as long as the finish of
the interior floor is not higher than the top of the
The K-span building system is similar to other
types of pre-engineered or prefabricated buildings in
that windows, doors, and roll-up doors can be installed
only when erection is completed. When insulation of
the building is required, insulation boards (usually 4
by 8 feet) maybe of any semirigid material that can
be bent to match the radius of the building. The
insulation is installed using clips, as shown in figure
When the integrity of the end-wall panels is
continuous from ground to roof line, the end walls
become self-supporting. The installation of
windows (fig. 8-21) and aluminum doors (fig. 8-22)
presents no problem because the integrity of the wall
system is not interrupted. The installation of the
overhead door (fig. 8-23) does present a problem in
that it does interrupt the integrity of the wall system.
This situation is quickly overcome by the easily
installed and adjustable (height and width)
doorframe package that supports both the door and
end wall. This doorframe package is offered by the
Shown in figure 8-24 are the fundamental steps in
constructing a K-span from start to finish.
ABM 240 SYSTEM
There is another type of K-span building,
actually referred to as a Super Span by the
manufacturer, the ABM 240. Actual construction of
the ABM 240 is the same as the ABM 120 (K-span).
It can use heavier coil stock and is a larger version.
Figure 8-25 is given to show the differences
between the two.
Keep in mind that the information provided in
this section on the K-span building is basic. During
the actual construction of this building, you must
consult the manufacturers complete set of