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

314 Chapter Ten
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are available in 6-in. increments. In some locations, steel forms may
be rented or purchased.
One-Piece Steel Round Column Forms
Round steel column forms are available as single one-piece units
for forming. Because the forms are fabricated as one piece, the finished
surface of the column does not show seam marks.
These types of forms are slipped over the top of the reinforcing
steel before placement of concrete, as illustrated in Figure 10-18.
Round column forms are available in 12- to 96-in. diameters. Steel
ribs keep the forms round and facilitate bracing and aligning the
forms. There is no loose hardware, which simplifies the reassembly
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for the next pour.
Column capitals are handled easily, as illustrated in Figure 10-19.
Steel capitals are available for use with forms whose diameters vary
from 12 to 42 in. in increments of 2 in., and whose top diameters vary
from 3 ft 6 in. to 6 ft 0 in. in increments of 6 in.
FIGURE 10-18
Slipping one-piece
steel round column
form over
reinforcement.
(Source: EFCO)
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