Stc Steel Roof

Trusses supporting metal roof deck panels covered by 1 2 12 7 mm regular gypsum sheathing either loose laid or adhesively or mechanically attached to roof deck.

Stc steel roof.

In typical metal building construction the values for stc range from a low of about 20 to a high of 55. Will also be providing acoustical ceiling grid tiles throughout. 5 or 6 points in laboratory stc ratings for essentially similar assemblies. The standard requires a minimum laboratory stc rating of 50 for party walls and floor ceilings.

Zoning overlay requires roof wall stc 65. Building is utilizing common wood trusses with concrete tile roofing and insulation directly beneath roof deck to avoid venting read penetrations. 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. Steel cornerbead 1 1 2 38 mm flanges applied with 1 25 mm type s.

Sound transmission loss properties of a wall or roof is the sound transmission class stc. Insulation thickness has a more significant effect on stc ratings than does density for a typical steel stud wall construction the first inch of fiber glass insulation can increase the stc value 6 or more points each additional inch of fiber glass insulation increases the stc value from one to two points conversely density variations have minimal effect on the stc rating see table 2. 6122 benjamin road tampa fl 33634. Project is within an air force approach zone.

The higher the stc value the better a construction reduces the transmission of sound.