Iic Of Wood Floor Structure

Dupree office of noise control california department of health services berkeley california 94704 introduction building codes.

Iic of wood floor structure.

5 8 16 mm plywood floor. The iic ratings for basic wood structure with no resilient underlayment is around 40 to 45 iic. Iic 50 the least amount of impact sound transmission reduction. 1 2 13 mm sound deadening board.

Floating engineered wood or laminate flooring. Without the addition of sound isolation products the iic rating of basic wood structures will rate better than concrete structures because they are naturally more resilient. For example the iic of a basic wood sub floor with no resilient underlayment is between 40 45 iic. Higher end units often expect iic ratings between 55 65.

This catalog of sound rated wall and the purpose of the indexing system is. For multi family structures some codes require an iic of 50 or more when tested in the laboratory or 45 or more when tested in the field. 2 x 3 51 mm x 76 mm furring. There is a small air gap allowing to absorb more sound.

The lowest iic rated floors ceiling assemblies come in at around 25 and the highest rated systems can come in at 85 and up. 1 2 13 mm plywood subfloor. Once treated with a sound impact underlayment the construction could achieve an iic of 70. Further complicating matters is the effect that poor construction techniques may have on the field iic performance of your flooring assembly.

Wood fr aming stc and iic values sound control stc 51 iic 78 stc 52 iic 49 with vinyl floor in place of carpet and pad 2 x 8 51 mm x 203 mm wood joists. Common guidelines to use when selecting the proper iic rating for your space. This results in a very significant reduction of the vibrations being transferred through the structure with a corresponding reduction in noise. The iic ratings for basic concrete sub floor with no resilient underlayment is around 28 to 35 iic.

The quietwalk underlayment provides very high ratings such as iic of 71 and stc 66 as of mid 2018. More typical values fall between 35 and 55. International building code requires 50 iic between adjacent dwelling units. Catalog of stc and iic ratings for wall and floor ceiling assemblies russell b.