Stc Rate Floor 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.

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. Figure 3 insulating wall cavities noticeably improves sound transmission loss by providingbetween one wall surface and the other cavity absorption. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly. Insulation will noticeably improve the stc rating of an assembly.

5 or 6 points in laboratory stc ratings for essentially similar assemblies. Ul l502 cul l502. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies. Staggered or double stud walls are higher rated than single stud walls.

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. Here you can find drawings for our ul fire rated floor assemblies and ul fire rated ceiling assemblies. 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.

Adding additional layers of drywall can improve the stc rating of an assembly. 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. Transmission the passage of sound waves from its source through a vibrating medium and to a listener.

Resilient channel can improve the stc rating of an assembly. 55 59 stc and 73 iic w c p. Metal stud walls perform better than wood stud walls. 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.

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. 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.