Concrete and Metal Wall Cladding Panelizing
Optimizing the precast system includes reducing the production cost and
increasing the speed of erection. The examples shown in drawing details P-1
through P-4 in the Typical
Details illustrate
several different ways panels can be combined or split up to achieve
a desired result. Depending on panel
sizes, shipping limitations, erection considerations and/or connection concepts,
any one of these solutions may
be the one best suited for your particular project. As shown in drawing details
P-2 and P-3 in the Typical
Details, it is desirable to maintain a minimum section
of 18-inches concrete around all
openings and block-outs. Also, rough-opening-window-widths should be limited
to 7-feet-0-inches unless special
designs are implemented. Consult your Easi-Set sales or technical representative
for assistance in providing optimal panelization options for your particular
project.
In general, the economics of the design are driven by two key factors:
- Size of panel
- Form utilization (repetition of same form)
Because erection
cost is typically considered on a fixed “per piece
basis,” it is generally advantageous to find ways
to reduce the number of erected pieces by making panels as large as possible.
Note, however, that panel size is
often constrained by fabrication and shipping considerations. Panel sizes
can also be affected by the hauling
conditions particular to the project in question and/or site conditions that
may result in weight or crane reach
limitations. Site access must also be considered when determining maximum
panel sizes. Generally, the maximum
economical size to produce is 10-feet by 35-feet. The largest panel size
that can be produced is 13-feet by 40-feet,
but there could be significant additional shipping costs to consider.
The
second consideration in panelizing the building is form utilization, or the
number of form set-ups. The more times the same form can be used, the lower
the fabrication cost per piece will be. Therefore, it is extremely useful
to look for ways to make maximum use of the same forms by building repetition
into the shapes and sizes. This
is especially important for buildings with brick finishes. Drawing Details
A-9 and A-10 contained in SECTION
3.01 of this Technical Design Guide show guidelines for laying out brick
patterns that reduce cost.
Your Easi-Set representative can assist you in
making the most economical choices for your particular project.
