2.5 or 3 Hours of Full Load Bearing Fire Protection.
The U382 Firewall from Nu-Wool is an engineered wall assembly that provides the industry's highest level of protection that costs less, and saves you more. Better design, better protection for less money. And it's UL approved.
- Our new U382 Firewall is a Nu-Wool proprietary design that is fully load bearing and offers two and a half hours, or three hours of protection that costs less, and saves you more than other solutions on the market.
- The U382 meets all the requirements of ASTM-E-119 and UL 263. The U382 meets the requirements of shaft wall assemblies, and the independently loaded double wall assembly maintains its integrity beyond the nominal one-hour per side, giving the U382 a two-hour and thirty minute rating with only one layer of 5/8 inch type C drywall on each side. A 3-hour rating is achieved by using 2 layers of drywall on each side.
- Each row of studs has a load of 10,932 pounds applied vertically to achieve the maximum working stress of wood studs in accordance with 2005 National Design Specifications for wood studs.
- STC tests were also done on three configurations of the U382 assembly: One using one layer of gypsum board per side achieving an STC of 53. The second test added one layer of gypsum board to one side and this wall assembly achieved an STC of 58. The third test for STC added a layer of gypsum board to each side and achieved an STC of 63.
Industry Leading Two and one-half or Three-Hour Firewall- Using 2 or 4 layers 5/8in.
Type C Gypsum Wallboard
Design No. U382 - Underwriters Laboratories
Bearing Wall Rating 2-1/2 or 3 Hr.
Riverbank Acoustical Laboratories
STC Rating: 53, 58, 63
U382 Firewall
Other Cost Saving Firewalls
- In addition to UL Design U382 described above, Nu-Wool has engineered two other proprietary UL-approved, cost-saving firewall designs. UL Design U360 is the only 2-hour, load-bearing firewall tested by UL that needs only three layers of 5/8" type X drywall resulting in savings of 25% on drywall labor and materials. Sound-absorbing UL design U369 has a high STC rating of 58 making it the design choice for sound control. All three of these innovative fire walls with limited layers of drywall successfully pass the stringent requirements of ANSI/UL 263 and ASTM E-119 because of the high density of Nu-Wool WALLSEAL, which slows the spread of fire by restricting the availability of oxygen. Nu-Wool WALLSEAL has also been approved for use in at least 50 additional UL approved firewall designs.
Cost Saving Two-Hour Firewall- Using Only 3 layers 5/8 in.
Type X Gypsum Wallboard
Design No. U360 - Underwriters Laboratories
Bearing Wall Rating 2 Hr.
Riverbank Acoustical Laboratories
STC Rating: 51 
Sound Absorbing Two-Hour Firewall- Using 4 layers 5/8 in.
Type X Gypsum Wallboard
Design No. U369 - Underwriters Laboratories
Bearing Wall Rating 2 Hr.
Riverbank Acoustical Laboratories
STC Rating: 58
- For detailed information on all of our UL approved firewall assemblies and specific STC Ratings contact us today. Or, download your Nu-Wool Architect’s Spec Book right here. An invaluable resource for any project or application. You can also call to set up an individualized lunch and learn session with a team of our technical services experts, just contact your area manager.