Typical

1/2"

Type X

gypsum board

STC

5/8"

Type X

gypsum board

1

• 2 X 4" studs spaced at 16" or 24" o.c.

• 3-1/2" thick absorptive material

• 1 layer of gypsum board on both sides

2

• 2 X 4" studs spaced at 16" or 24" o.c.

• 3-1/2" thick absorptive material

• 2 layers of gypsum board on both sides

3

• 2 X 4" studs spaced at 24" o.c.

• 3-1/2" thick absorptive material

• resilient metal channels on one side spaced 16" or 24" o.c.

• 1 layer of gypsum board on both sides

4

• 2 X 4" studs spaced at 24" o.c.

• 3-1/2" thick absorptive material

• resilient metal channels on one side spaced 16" or 24" o.c.

• 1 layer of gypsum board on resilient metal channel side.

• 2 layers of gypsum board on other side

5

1 - layer of 3-1/2" absorptive material on one side

2 - layers of 2-1/2" absorptive material on both sides

• 2 rows of staggered studs spaced at 16" or 24" o.c. on a common 2 X 6" plate

• 3-1/2" thick absorptive material on one side or 2-1/2" thick material on both sides

• 1 layer of gypsum board on both sides

Typical

1/2"

Type X

gypsum board

STC

5/8"

Type X

gypsum board

6

1 - layer of 3-1/2" absorptive material on one side

2 - layers of 2-1/2" absorptive material on both sides

• 2 rows of staggered studs spaced at 16" or 24" o.c. on a common 2 X 6" plate

• 3-1/2" thick absorptive material on one side or 2-1/2" thick material on both sides
• 1 layer of gypsum board on one side

• 2 layers of gypsum board on other side

7

1 - layer of 3-1/2" absorptive material on one side

2 - layers of 2-1/2" absorptive material on both sides

• 2 rows of staggered studs spaced at 16" or 24" o.c. on a common 2 X 6" plate

• 3-1/2" thick absorptive material on one side or 2-1/2" thick material on both sides

• 2 layers of gypsum board on both sides