Drop ceiling tile sound barrier is made with foil faced mass loaded vinyl bonded to a scrim faced fiberglas.
Stc 50 suspended ceiling.
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.
An assembly rated at stc 50 will satisfy the building code requirement.
50 stc with single layer designs.
In base layer and 1 5 8 2.
One hour fire rated partition 3.
Installs by simply placing on top of existing ceiling tiles.
5 8 15 9 mm toughrock fireguard c gypsum board or 5 8 15 9 mm densarmor plus fireguard c gypsum panels applied perpendicular to i shaped wood joists or wood and steel trusses spaced 19 2 488 mm o c.
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.
In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies.
24 x 48 tiles.
Ubc requirements for floor ceiling assemblies.
Through base layer perpendicular to.
24 x 24 tiles.
Stc 50 lab test 3 tl 93 333 alternative stc 50 wall options.
25 gauge metal studs 24 with 1 type s drywall screws 36 o c.
Available in two sizes.
Optimizing ceiling systems and lightweight plenum barriers to achieve ceiling attenuation class cac ratings of 40 45 and 50.
Stc ratings of 50 if tested in a laboratory or 45 if tested in the field.
All too often this plenums and suspended ceilings unbaffled ducts window to window outdoors common heating units transoms and air grilles.
The field test evaluates the dwelling s actual construction and includes all sound paths.
Test curve and the stc rating is heavily influenced by a measurement in one fre quency band.
The standard requires a minimum laboratory stc rating of 50 for party walls and floor ceilings.
Two hour fire rated partition.
High cac ceiling panels can provide this type of sound control increasing speech.
Resilient channels attached 16 406 mm o c.
Stc rating of 29 and fire rated astm e 84 class a.
Some armstrong ceilings contain mineral wool but they do not represent a health risk see below.
Fire rated floor ceiling assemblies using metal framing stc 50 iic 50 fire rating as shown 1.
