Stc Ratings For Floor Ceiling Assemblies

Iic impact isolation class astm e492 e989 and stc sound transmission class astm e336 e413 are both tests for sound traveling through the total floor ceiling assembly from an upper living area to a lower living area.

Stc ratings for floor ceiling assemblies. Insulation for sound fire rated assemblies. Impact noise tested on floor ceiling systems only is reported as the impact insulation class iic. Here you can find drawings for our ul fire rated floor assemblies and ul fire rated ceiling assemblies. Airborne sound passes through a space by vibrating the air.

One hour fire rated partition parallel to one side of min. The field test evaluates the dwelling s actual construction and includes all sound paths. Dupree office of noise control california department of health services berkeley california 94704 introduction building codes. 55 59 stc and 73 iic w c p.

An assembly rated at stc 50 will satisfy the building code requirement. Ul l502 cul l502. Two hour fire rated partition. This catalog of sound rated wall and the purpose of the indexing system is.

The stc rating shown reflects testing or evaluation of an assembly with one or more products under test conditions and may not apply to all products listed for each assembly. Structure borne sound travels through wall partitions ceilings and floor ceiling assemblies. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly. Class stc side to the other.

Ubc requirements for floor ceiling assemblies. Figure 3 insulating wall cavities noticeably improves. Fire rated floor ceiling assemblies using metal framing stc 50 iic 50 fire rating as shown 1. Transmission the passage of sound waves from its source through a vibrating medium and to a listener.

In base layer and 1 5 8 2. Sound ratings gypsum board assemblies are laboratory tested to establish their sound insulation characteristics. 25 gauge metal studs 24 with 1 type s drywall screws 36 o c. Catalog of stc and iic ratings for wall and floor ceiling assemblies russell b.

Base layer 1 x 24 toughrock shaftliner or densglass shaftliner panels between 2 1 2 floor and ceiling j runners with t section of 2 1 2 steel c h c t or i studs between panels. Floor and ceiling assemblies solid wood floor joist assemblies wood i joist assemblies wood truss assemblies steel joist floors sound absorption coefficients. Airborne sound insulation is reported as the sound transmission class stc. Stc ratings of 50 if tested in a laboratory or 45 if tested in the field.

Impact sound complaints are common on floor ceiling assemblies that meet the bare minimum requirement of 50 decibels iic.