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

Downloaded From : www.EasyEngineering.net
Forms for Walls 269
FIGURE 9-37
Corporation)
Forming assembly to provide a brick ledge. (Source: Dayton Superior
ww.EasyEngineering.n
Forms for a Concrete Wall Requiring a Ledge for Brick
Brick ledges may be formed with 2 × 4 lumber placed in either a vertical
or a horizontal position, as shown in Figure 9-37. By adding shims
of the required thickness to a 2 × 4, ledges of varying thickness may
be formed. Intermediate vertical 2 × 4 s only need to project slightly
above the 2 × 4 s forming the brick ledge.
Forms for a Stepped Concrete Wall
Figure 9-38 illustrates a method of forming a wall with a step in the
elevation. Using the Jahn brackets and tie extender for the attachment
of strongbacks allows 2 × 4 wales to run free if tie holes do not line up
at stepdowns. Where tie alignment is fairly close, the Jahn brackets
may be used, as shown in the insert.
Modular Panel Systems
Figure 9-39 illustrates a section of a modular panel that can be
attached to an adjacent panel to produce a continuous wall-forming
system. Panel sections are also located on the opposite side of a concrete
wall. When several of these sections are joined together and
form ties are installed, they produce a quickly assembled and economical
system of forms for walls, permitting repetitive reuses.
After the concrete has attained sufficient rigidity, the ends of the ties
Downloaded From : www.EasyEngineering.net