Compliance with State Noise Insulation Standards is
now required for all new multi-family dwelling units constructed
in California. These standards set minimum rating for sound transmissions
for party walls between dwelling units. The sound transmission values
for various masonry walls is listed below. We suggest you consult
your latest edition of "The Concrete Masonry Design Manual"
for more complete information on the subject...
| |
wall thickness
(inches) |
STC |
WALL DESCRIPTION |
weight
of wall
lbs
/sq. ft |
TEST NO |
| |
4 |
|
Hollow Concrete Block, Unplastered, Ungrouted |
|
|
| |
|
40 |
Lightweight Units, Unpainted |
18.0 |
KAL 359-1.66 |
| |
|
41 |
Normal Weight Units, Painted Both Sides (2Coats) |
26.5 |
TL 67-99 |
| |
|
|
|
|
|
| |
4 |
|
Hollow Concrete Block, Painted Both Sides (2Coats) |
|
|
| |
|
43 |
Lightweight Units, Ungrouted |
22.0 |
KAL 1379-5-72 |
| |
|
44 |
Normal Weight Units, Ungrouted |
29.0 |
KAL 1379-3-72 |
| |
|
|
|
|
|
| |
4 |
|
Hollow Concrete Block, Plastered Both Sides, Ungrouted |
|
|
| |
|
|
Normal Weight Units |
34.8 |
TL 67-102 |
| |
|
|
|
|
|
| |
4 |
|
Hollow Concrete Block, ½ inch Gypsum Board on Resillent
Channels each side
|
|
|
| |
|
47 |
Lightweight Blocks, Ungrouted |
26.0 |
KAL 1379-4-72 |
| |
|
48 |
Normal Weight Blocks, Ungrouted |
32.0 |
KAL 1379-2-72 |
| |
4 |
48 |
Hollow Concrete Block, Plastered both sides, Ungrouted |
30.0 |
KAL 359-7-66 |
| |
|
|
|
|
|
| |
6 |
44 |
Hollow Concrete Block, Unpainted, Unplastered, Ungrouted |
21.0 |
KAL 359-4-66 |
| |
|
|
|
|
|
| |
6 |
|
Hollow Concrete Block, Painted Both Sides (2 Coats) |
|
|
| |
|
46 |
Lightweight Blocks, Ungrouted |
28.0 |
KAL 933-2-70 |
| |
|
48 |
Normal Weight Blocks, Ungrouted |
39.0 |
KAL 1379-1-72 |
| |
|
|
|
|
|
| |
|
53 |
Hollow Concrete Block, 2 Coats Paint One Side
½
inch Gypsum Board on Resilient Channel Other Side |
27.0 |
KAL 359-6-66 |
| |
|
|
|
|
|
| |
8 |
45 |
Hollow Concrete Block, Unpainted, Unplastered,Ungrouted |
36.0 |
KAL359-3-66 |
| |
|
|
|
|
|
| |
8 |
48 |
Hollow Concrete Block Painted Both Sides (2 Coats) Ungrouted
|
33.5 |
TL 67-61 |
| |
|
|
|
|
|
| |
|
|
|
|
|
| |
8 |
49 |
Hollow Concrete Block, Unpainted, Unplastered, Ungrouted |
42.8 |
KAL1144-2-71 |
| |
|
|
|
|
|
| |
8 |
50 |
Hollow Concrete Block,Exterior Wall Painted Outside (2 Coats)
Gypsum Board on Furring Strips Inside, Ungrouted |
45.6 |
TL 67-93 |
| |
|
|
|
|
|
| |
8 |
51 |
Hollow Concrete Block, Cells filled Zonolite, Unpainted |
39.6 |
KAL 1144-4-71 |
| |
|
|
|
|
|
| |
|
52 |
Hollow Concrete Block, Normal Weight Block, Ungrouted Unpainted |
53.0 |
KAL 1144-3-71 |
| |
|
|
|
|
|
| |
8 |
55 |
Hollow Concrete Block, Normal Weight Block, Ungrouted
Painted Both Sides (2 Coats), Reinforced |
73.0 |
KAL 1023-3-71 |
| |
|
|
|
|
|
| |
8 |
56 |
Hollow Concrete Lightweight, Ungrouted
5/8 inch Gypsum Board on Resilient Channels One Side
Lightweight Block
|
40.4 |
KAL 933-1-70 |
| |
|
|
|
|
|
| |
8 |
|
Hollow Concrete Lightweight Block, Solid Grouted, Reinforced |
|
|
| |
|
56 |
½ inch Gypsum Plaster Both Sided
|
79.0 |
KAL 1023-9-71 |
| |
|
60 |
½ inch Gypsum Board on Resilient Channels, Both sides
|
77.0 |
KAL 1023-3-71 |
| |
|
|
|
|
|
| |
12 |
55 |
Solid Concrete Block, Unpainted, Unplastered
|
1212.0 |
NGC 3002 |
| |
|
|
|
|
|
| |
12 |
58 |
Solid Concrete Block, 5/8 inch Gypsum Board on Resilient
Channels, One Side |
124.0 |
NGC 3003 |
| |
|
|
|
|
|
