Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

212 Chapter Nine
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FIGURE 9-1 Forms for concrete wall.
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Definition of Terms
Sometimes there are variations in the terminology used in the construction
industry. Figure 9-1 illustrates the components of a set of
wall forms. Walls with pilasters, counterforts, setbacks, corbels, and
other structural components require modified forms, which will be
discussed later in this chapter.
The following terms related to job-built formwork for wall are
used in this book:
1. Sheathing is the plywood on each side of the wall against which
the fresh concrete is placed. The sheathing provides resistance to the
pressure of the freshly placed concrete.
2. Studs are the members to which the sheathing is attached. They
are normally installed vertically. Studs are usually single members of
2 × 4, 2 × 6, or larger lumber, depending on the pressure on the forms.
Studs provide support for the sheathing.
3. Wales, are usually double 2 × 4, 2 × 6, or larger lumber with
separators, are installed on opposite sides of wall forms, perpendicular
to the studs, to hold the studs in position, to ensure good
alignment for the forms, and to receive the form ties. Other names by
which this member is called are walers or waling. The wales provide
support for the studs.
4. Strongbacks sometimes are installed perpendicular to wales to
provide additional strength and rigidity to high forms.
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