Stc Rate Floor Assembly

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.

Stc rate floor assembly.

Impact sound complaints are common on floor ceiling assemblies that meet the bare minimum requirement of 50 decibels iic. Stc ratings for wall floor and window materials and assemblies 3 appendix a stc ratings a 1 walls a 1 exterior a 1 interior a 9 wooden studs a 9 metal studs a 14 floors a 16 wood a 16 concrete a 21 windows a 24 doors a 27 exterior a 27 interior a 29 appendix b references b 1. Wall floor assembly guide insulation for sound fire rated assemblies. This is usu ally because there is a pronounced dip in the test curve and the stc rating is heavily influenced by a measurement in one fre quency band.

Resilient channel can improve the stc rating of an assembly. Here you can find drawings for our ul fire rated floor assemblies and ul fire rated ceiling assemblies. 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. 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.

Sound transmission class guidance. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies. Insulation will noticeably improve the stc rating of an assembly. The standard requires a minimum laboratory stc rating of 50 for party walls and floor ceilings.

Ul l502 cul l502. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly. Transmission the passage of sound waves from its source through a vibrating medium and to a listener. Metal stud walls perform better than wood stud walls.

Figure 3 insulating wall cavities noticeably improves sound transmission loss by providingbetween one wall surface and the other cavity absorption. Airborne sound passes through a space by vibrating the air. 5 or 6 points in laboratory stc ratings for essentially similar assemblies. 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.

55 59 stc and 73 iic w c p. Staggered or double stud walls are higher rated than single stud walls.