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Tilt-Up Concrete Construction
Footings
and Floor Slabs
Once planning is complete, construction
can begin. Install footings as level as possible, with attachment
plates (if used) placed properly. Spread footings are used most
often for Tilt-Up buildings, but pier footings can be considered if
conditions warrant their use.
Footing locations, heights, and dimensions should be checked and
verified for correctness. Crane time is expensive if modifications
must be made while a panel is suspended over an incorrect plate or
footing. Setting a panel down after it has been lifted interrupts
the construction schedule. Also, panel lifting hardware may be
designed for only one pick, so repeated handling can reduce the
safety factor for that hardware.
Minor mistakes in floor slab construction often can be masked or
corrected. A poor floor slab, however, can affect the appearance of
the Tilt-Up panel. The slab should be smooth and hard and
contraction joints should be positioned where they will have minimal
impact on the panel. If the joint must fall beneath the panel, clean
the joint and fill it with caulk.
Floor sealing or hardening compounds must be compatible with any
chemicals or paints used on the panels or there may be problems when
the panels are stripped or painted.
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