Stc 50 Ceiling

At intermediate studs when applied.

Stc 50 ceiling.

Two hour fire rated partition. 50 stc with single layer designs. Ubc requirements for floor ceiling assemblies. 5 or 6 points in laboratory stc ratings for essentially similar assemblies.

High cac ceiling panels can provide this type of sound control increasing speech. The standard requires a minimum laboratory stc rating of 50 for party walls and floor ceilings. Designed for ceiling or duct shaft and composed of 1 25 4 mm toughrock shaftliner or densglass shaftliner panel supported by 2 1 2 64 mm 4 102 mm or 6 152 mm c t studs and three layers of 1 2 12 7 mm toughrock fireguard c or 1 2 12 7 mm densarmor plus fireguard c gypsum board. 1 ansi asa s12 60 2010 part 1 american national standard acoustical performance criteria design requirements and guidelines for schools part 1.

25 gauge metal studs 24 with 1 type s drywall screws 36 o c. Ceiling attenuation a measurement of the ability of a ceiling panel to block the travel of sound from an enclosed room up into the plenum class cac and down to adjacent spaces. Fire rated floor ceiling assemblies using metal framing stc 50 iic 50 fire rating as shown 1. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies.

5 8 15 9 mm toughrock fireguard x per ul u421 only products or 5 8 15 9 mm densarmor plus fireguard gypsum panels applied vertically or horizontally to one side of 2 1 2 64 mm 25 gauge 18 mils steel studs 24 610 mm o c. Optimizing ceiling systems and lightweight plenum barriers to achieve ceiling attenuation class cac ratings of 40 45 and 50. Stc 50 lab test 5 tl 93 333 alternative stc 50 wall options. 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 field test evaluates the dwelling s actual construction and includes all sound paths. Stc 50 lab test 3 tl 93 333 alternative stc 50 wall options. 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. One hour fire rated partition 3.

With 1 25 4 mm type s drywall screws 8 203 mm o c. One hour fire rated partition parallel to one side of min. At vertical joints and 12 305 mm o c.