Stc Rate Floor 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.

Stc rate floor assembly. 5 or 6 points in laboratory stc ratings for essentially similar assemblies. 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. 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. Transmission the passage of sound waves from its source through a vibrating medium and to a listener.

Staggered or double stud walls are higher rated than single stud walls. Ul l502 cul l502. 55 59 stc and 73 iic w c p. 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.

Insulation will noticeably improve the stc rating of an assembly. Impact sound complaints are common on floor ceiling assemblies that meet the bare minimum requirement of 50 decibels iic. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly. 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.

Sound transmission class guidance. The standard requires a minimum laboratory stc rating of 50 for party walls and floor ceilings. Wall floor assembly guide insulation for sound fire rated assemblies. Resilient channel can improve the stc rating of an assembly.

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. Figure 3 insulating wall cavities noticeably improves sound transmission loss by providingbetween one wall surface and the other cavity absorption. 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. Here you can find drawings for our ul fire rated floor assemblies and ul fire rated ceiling assemblies.

Adding additional layers of drywall can improve the stc rating of an assembly. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies.