Stc 50 Suspended Ceiling

Some armstrong ceilings contain mineral wool but they do not represent a health risk see below.

Stc 50 suspended ceiling.

In base layer and 1 5 8 2. The standard requires a minimum laboratory stc rating of 50 for party walls and floor ceilings. 24 x 48 tiles. Stc rating of 29 and fire rated astm e 84 class a.

Ubc requirements for floor ceiling assemblies. 25 gauge metal studs 24 with 1 type s drywall screws 36 o c. Available in two sizes. Through base layer perpendicular to.

All too often this plenums and suspended ceilings unbaffled ducts window to window outdoors common heating units transoms and air grilles. Two hour fire rated partition. Stc ratings of 50 if tested in a laboratory or 45 if tested in the field. The field test evaluates the dwelling s actual construction and includes all sound paths.

The safety of those armstrong acoustical ceiling products that do contain mineral wool has been confirmed through occupational studies of mineral wool workers which have been carried out for more than 50 years. High cac ceiling panels can provide this type of sound control increasing speech. Optimizing ceiling systems and lightweight plenum barriers to achieve ceiling attenuation class cac ratings of 40 45 and 50. 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.

Resilient channels attached 16 406 mm o c. Installs by simply placing on top of existing ceiling tiles. Stc 50 lab test 3 tl 93 333 alternative stc 50 wall options. 24 x 24 tiles.

Drop ceiling tile sound barrier is made with foil faced mass loaded vinyl bonded to a scrim faced fiberglas. 50 stc with single layer designs. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies. An assembly rated at stc 50 will satisfy the building code requirement.

One hour fire rated partition 3. Maximum with 1 5 8 41 mm type s drywall screws 8 203 mm o c. One hour fire rated partition parallel to one side of min. Test curve and the stc rating is heavily influenced by a measurement in one fre quency band.