Figure 8-10.Typical K-span building.
strength arched panels. The panels are then machine
seamed together to form an economical and watertight
The final shape and strength of the materials used
cancels the need for columns, beams, or any other type
of interior support. All of the panel-to-panel
connections are joined using an electric automatic
seaming machine. Because of this, there are no nuts,
bolts, or any other type of fastener to slow down
construction or create leaks.
Once delivered to the jobsite, the on-site
manufacturing abilities of the machine give the ABM
operator complete control of fabrication as well as the
quality of the building, Training key personnel in the
operation of all related K-span equipment is essential.
These crew members, once trained, can instruct other
members of the crew in the safe fabrication and
erection of a K-span. The following section gives you
some, but not all, of the key elements associated with
K-span construction. As with all equipment, always
refer to the manufacturers manuals.
The main component of the K-span system is the
trailer-mounted building machine (fig. 8-12). This
figure shows the main components of the trailer and
the general operating instructions. The primary
position is the operators station at the rear of the
trailer (fig. 8-13). The crew member, selected for this
position, must have a thorough understanding of the
machine operations and the manuals. From that
position, the operator controls all of the elements
required to form the panels. First, the operator must
run the coil stock through the machine to form the
panel shape. Next, it is cut off at the correct length.
This length is the required length for one arched panel
to run continuously from one footer to the other. Last,
after the panel is cut to length, it is run back through
the machine to give it the correct arch. The operator
must remain at the controls at all times. From the
placement of the trailer on site to the completion of
the curved panel, attention to detail is paramount as
with all of the aspects of construction.
As you operate the panel, you will be adjusting the
various machine-operating components. Adjustments
for the thickness, the radius, and the curving machine
MUST be made according to the manuals. Do not
permit shortcuts in adjustments. Any variations in
adjustments or disregard for the instructions found in
the operating manuals will leave you with a pile of
useless material or an inconsistent building.