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The
modular building process offers great time savings versus
conventional construction. At
the same time the building modules are being fabricated
in the factory, the site is being prepared to receive the
finished building. The installation of the building on its
foundation is at the very least just as important as constructing
the modules in the factory. Attention to detail, design
and site conditions is of utmost importance.
Based
on your needs there are three types of site installation
of modular buildings:
1 - Temporary
installation
2 - Semi
permanent installation
3 - Permanent
installation
Generally
a temporary
installation is for buildings that are on rent or
lease for a very short period of time, and the building
will be relocated to a new site often. Typically this type
of building will have an inexpensive foundation enclosure
(skirting) that may or may not be discarded and very temporary
steps that can be sent away with the building. The foundation
for this type of building may have pads in lieu of footers
below the frost line, dry block, and auger type anchors.
This type of building is usually found on construction or
industrial sites.
A semi
permanent installation is for a structure that will
stay on site for many years. The foundation typically has
footers to the frost line and poured piers or mortared block
piers with the modules welded to the piers. The foundation
enclosure will usually match the structure or be of a contrasting
material like brick or stone. Although the building will
be staying on site for a long period of time, the elevated
floor level requires a need for steps and handicap ramps.
These are usually constructed of treated wood or PVC. The
module support system (chassis) of the building is designed
to stay with the structure and is usually of a perimeter
design to allow for increased floor loads. This type of
support system will also add to the longevity of the structure.
Permanent installation is for the structure that will stay
at its original location. The building will typically have
a crawl space foundation recessed to grade with masonry
or poured walls. In some instances a basement foundation
or slab on grade may be used.
Permanent
installation involves multi story structures on
many installations. Many times the design of a permanently
sited building is more involved and requires a mix of three
dimensional modular units, panelized, and conventional construction
methods. Foundations of these buildings allow for the floor
of the structure to be at grade, therefore eliminating the
need or steps or handicap ramps. A wide variety of exterior
finishes are used on the permanently sited building which
may include brick, "Dryvit" stucco or elaborate steel facades.
A modular structure being installed in a permanent application
would have no noticeable differences to a conventionally
constructed building.
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