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

Downloaded From : www.EasyEngineering.net
Forms for Architectural Concrete 411
FIGURE 14-12 Forms for producing special corner designs. (Source: Portland
Cement Association)
ww.EasyEngineering.n
justify the possible higher initial cost, consideration might be given to
using sheet-metal forms, with wood ribs sawed to the required
curvature, spaced not more than 12 in. apart, and used to back up the
metal to prevent distortion. Figure 14-12 illustrates two types of formwork
for producing special corner designs in buildings or other concrete
structures.
Forms for Parapets
The forms for several types of parapet walls are illustrated in
Figure 14-13. On the exposed sides of the walls the forms are constructed
to reproduce the specified details and ornaments. The forms
for the back wall may be supported by 1- by 4-in. pieces of lumber,
pointed on the lower ends, which rest on the slab decking. The supporting
pieces are removed before the concrete slab hardens, and the
holes are filled with concrete.
Forms for Roof Members
Figures 14-14 and 14-15 illustrate the pleasing aesthetics that can be
achieved by using plywood in making forms for roof members.
Downloaded From : www.EasyEngineering.net