Stc Rated Roof Assemblies

Sound ratings shown for steel framed partitions apply to systems constructed with 25 gauge steel studs 24 o c unless otherwise noted.

Stc rated roof assemblies.

Dupree office of noise control california department of health services berkeley california 94704 introduction building codes. One hour fire rated partition parallel to one side of min. One hour fire rated partition 3. Insulation will noticeably improve the stc rating of an assembly.

Comply with fire resistance requirements under evaluation reports of ul u336. With 1 3 8 35 mm phosphate coated nails spaced 12 305 mm o c. 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. This catalog of sound rated wall and the purpose of the indexing system is floor ceiling assemblies was compiled from to enable the user.

Based on experience the stc values are very close to those obtained for the assembly under current methods at 16 frequencies. Moisture resistant assemblies aesthetic assemblies sa932 sa933 sheetrock gypsum panels submittal sheet wb1473 usg area separation walls achieve up to 60 stc offer 2 hr. 1 2 12 7 mm toughrock fireguard 45 gypsum board applied vertically or horizontally to each side of 2 x 4 wood studs 24 610 mm o c. Impact noise tested on floor ceiling systems only is reported as the impact insulation class iic.

Fire rated floor ceiling assemblies using metal framing stc 50 iic 50 fire rating as shown 1. Horizontal edge joints and horizontal butt joints on opposite side of studs need not be staggered. Resilient channel can improve the stc rating of an assembly. Sound ratings gypsum board assemblies are laboratory tested to establish their sound insulation characteristics.

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. 25 gauge metal studs 24 with 1 type s drywall screws 36 o c. In base layer and 1 5 8 2. Adding additional layers of drywall can improve the stc rating of an assembly.

Two hour fire rated partition. Heavier gauge studs are more rigid and may not provide the same sound ratings. Metal stud walls perform better than wood stud walls. Staggered or double stud walls are higher rated than single stud walls.

Astm e90 standard test. Catalog of stc and iic ratings for wall and floor ceiling assemblies russell b.