Figure 6-61-Application of gypsum board finish:
A. Strongback B. Vertical application; C. Horizontal
figure 6-61, view A, a strongback is usually
used for aligning ceiling joists or studs to provide
a smooth, even surface. Figures 6-62 and 6-63
show typical application of paneling using other
types of dry-wall finishes.
A variety of ceiling systems can also be used
to change the appearance of a room, lower a
ceiling, finish off exposed joints, or provide
Figure 6-62.-Application of vertical paneling.
Figure 6-63.-Application of tongued-and-grooved pan-
eling over studs.
acoustical control. Suspended acoustical ceiling
systems are designed to integrate the functions of
lighting, air distribution, and fire protection.
Acoustical tiles, available in 12-to 30-in. widths,
12- to 60-in. lengths, and 3/16- to 3/4-in.
thicknesses, are used with the other grid system
components (fig. 6-64). Depending on the type of
ceiling or roof construction, ceiling tiles may be
installed in various ways, such as with the use of
wood strips nailed across the ceiling joists or roof
trusses (fig. 6-65).