Stc 50 Floor Assembly

An assembly rated at stc 50 will satisfy the building code requirement. Sound transmission measurement of the ability of a wall or floor assembly to isolate airborne sound and prevent it from passing from one class stc side to the other. Transmission the passage of sound waves from its source through a vibrating medium and to a listener.

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This catalog of sound rated wall and the purpose of the indexing system is.

Stc 50 floor assembly.

Its design gp wa. Stc ratings of 50 if tested in a laboratory or 45 if tested in the field. Adding additional layers of drywall can improve the stc rating of an assembly. Catalog of stc and iic ratings for wall and floor ceiling assemblies russell b.

Fire rated floor ceiling assemblies using metal framing stc 50 iic 50 fire rating as shown 1. 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. Dupree office of noise control california department of health services berkeley california 94704 introduction building codes. Airborne sound passes.

Wood joists supporting 1 25 4 mm nominal wood subfloor and 1 25 4 mm nominal wood finish floor or 19 32. Metal stud walls perform better than wood stud walls. One hour fire rated partition parallel to one side of min. 50 stc with single layer designs.

Two hour fire rated partition. Staggered or double stud walls are higher rated than single stud walls. Ul v487 ulc w482 cul v487. Resilient channel can improve the stc rating of an assembly.

The field test evaluates the dwelling s actual construction and includes all sound paths. Search for georgia pacific assemblies by selecting an assembly type hourly rating stc rating or product type above or type part of a assembly name. Here you can find drawings for our ul fire rated floor assemblies and ul fire rated ceiling assemblies. Insulation will noticeably improve the stc rating of an assembly.

Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly. One layer 1 x24 toughrock shaftliner or densglass shaftliner panels between 2 1 2 floor and ceiling j runners with t section of 2 1 2 steel c t studs between panels. Ubc requirements for floor ceiling assemblies. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies.

25 gauge metal studs 24 with 1 type s drywall screws 36 o c. One hour fire rated partition 3. In base layer and 1 5 8 2.

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