The above system gains the advantage of low shipping cost as onsite
adjustments are possible. But the time and labor consumption are
recorded to be high.
(Fig 5.2)
Unitized curtain wall systems involve assembling through
interlocking units that are bought from the factory. The whole
components are bought together as a single unit from the factory.
Individual installation of each component is not necessary as
required in stick system. The size of the unitized curtain wall is
dependent on the floor to floor height of the building. Hence it is
essential to keep in mind the mode of transportation and installation
while planning the depth of facade. Unitized systems are mainly
used in high rise buildings. This does not require exterior supports
like cranes or scaffolding. Only mini cranes or a temporary hoist can
be held over the floor to keep it help during installation.
The unitized curtain wall systems gain the advantage of faster
construction and higher quality because of factory manufacturing.
But it does gain a high shipping charge due to the requirement of
larger protection during transportation.