Stc Ratings For Floor Ceiling Assemblies

Airborne sound passes through a space by vibrating the air.

Stc ratings for floor ceiling assemblies.

Here you can find drawings for our ul fire rated floor assemblies and ul fire rated ceiling assemblies. 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. Ul l502 cul l502 ga fc 5105 2. 25 gauge metal studs 24 with 1 type s drywall screws 36 o c.

Floor and ceiling assemblies solid wood floor joist assemblies wood i joist assemblies wood truss assemblies steel joist floors sound absorption coefficients. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly. Astm e90 standard test. Impact sound complaints are common on floor ceiling assemblies that meet the bare minimum requirement of 50 decibels iic.

Catalog of stc and iic ratings for wall and floor ceiling assemblies russell b. 55 59 stc and 73 iic w c p. In base layer and 1 5 8 2. Dupree office of noise control california department of health services berkeley california 94704 introduction building codes.

This catalog of sound rated wall and the purpose of the indexing system is. Ultimately the design and detailing of the project assembly or system is the responsibility of a professional and all projects must comply with applicable building. Class stc side to the other. 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.

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. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies. Fire rated floor ceiling assemblies using metal framing stc 50 iic 50 fire rating as shown 1. Sound ratings gypsum board assemblies are laboratory tested to establish their sound insulation characteristics.

Airborne sound insulation is reported as the sound transmission class stc. Structure borne sound travels through wall partitions ceilings and floor ceiling assemblies. One hour fire rated partition 3. One hour fire rated partition parallel to one side of min.

Impact noise tested on floor ceiling systems only is reported as the impact insulation class iic. Stc is calculated by taking the transmission loss tl values tested at 16 standard frequencies over the range of 125 hz to 4000 hz and plotted on a graph. Two hour fire rated partition.