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

402 Chapter Fourteen
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FIGURE 14-3 Locations of construction joints in a building. (Source: Portland
Cement Association)
vertical surfaces. Figure 14-3 illustrates desirable locations of construction
joints for a building.
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Detailing Forms
Specifications for architectural concrete frequently require the contractor
to submit, for approval by the architect or engineer, large-scale
drawings showing in detail the formwork that he or she plans to use in
casting the various members or units. Regardless of such requirements,
fully dimensioned plans showing elevations, sections, and other information
are desirable for use by the carpenters or mill workers who
make and assemble the component parts of the formwork. These plans
should show the exact dimensions and locations of all features that are
to appear in or on the concrete. Figure 14-4 illustrates a set of detail
plans for the formwork for the frieze around a concrete building.
Figure 14-5 illustrates a form detail showing a horizontal section
through the wall of a portion of a concrete building, extending from
the entrance at the left of Figure 14-5(a) to the corner at the right side
of Figure 14-5(b). Exact sizes, shapes, and locations of all details must
be shown on the final drawings.
Order of Erecting Forms for a Building
The order of erecting the forms for a building should be scheduled
before materials are ordered and the formwork is fabricated. The
materials that will be erected first should be ordered and fabricated
first. The schedule selected will depend largely on the type of
building to be constructed. There are three general plans for erecting
formwork for structures using architectural concrete.
Plan 1: For one- and two-story buildings and the lower stories of
tall buildings, which are usually more highly ornamented than the
stories above, the following procedure may be used:
1. Erect the outside wall forms and bring them to alignment.
2. Erect the inside wall forms and the floor forms.
3. Bring all forms to the proper alignment, tighten the braces,
and secure all form parts.
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