Stc Rate Floor Assembly

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.

Stc rate floor assembly.

The standard requires a minimum laboratory stc rating of 50 for party walls and floor ceilings. Ul l502 cul l502. 5 or 6 points in laboratory stc ratings for essentially similar assemblies. 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.

Staggered or double stud walls are higher rated than single stud walls. Metal stud walls perform better than wood stud walls. Sound transmission class guidance. Here you can find drawings for our ul fire rated floor assemblies and ul fire rated ceiling 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. 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. 55 59 stc and 73 iic w c p. Insulation will noticeably improve the stc rating of an assembly.

Wall floor assembly guide insulation for sound fire rated assemblies. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire rated ceiling assembly. 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. 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. Airborne sound passes through a space by vibrating the air. 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 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.

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