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

308 Chapter Ten
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FIGURE 10-12
Adjustable
wraparound
column forms.
(Source: Gates &
Sons, Inc.)
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Adjustable Wraparound Column Forms
Figure 10-12 illustrates a wraparound forming system fabricated from
modular panels. Four panel units are placed in position by overlapping
to obtain the desired column size. Each panel has a pin that is inserted
to its adjacent panel, which is secured by a special locking device.
The panel forms can be changed easily from one size to another
by changing a vertical row of ³⁄16-in. hole plugs in the panels. A pin
and lock attachment is used to secure the panel units. The tap of a
carpenter’s hammer quickly opens or closes the sliding lock from the
connecting pin. All hardware is attached to the column form. There
are no loose bolts, nuts, or wedges.
The forms have a pickup loop for easy handling. Forms may be
ordered with or without hardwood chamfer at the corners. By drilling
extra holes and placing plastic plugs in them, a column form can
be used for 18- to 24-in. size columns by moving the plastic plugs.
Bracing plates and scaffolding methods are also designed to fit these
wraparound adjustable column forms. Figure 10-13 shows the proper
method of removal of the forms from the concrete column.
All-Metal Forms for Rectangular Forms
Lightweight all-metal column forms as shown in Figure 10-14 are
available for concrete pressures up to 1,200 lb per sq ft. Smooth concrete
finished surfaces may be produced from the ¹⁄8-in.-thick steel
face of the forms. Metal forms are precision manufactured, which
provides precise fit of forms.
The forms are assembled from modular panels of various widths
and lengths. Modules in heights of 1, 2, 4, and 8 ft are available in
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