BW Universal System™
Metl-Span’s BW Universal System™ is the ultimate backup horizontal backup wall system that provides superior air, water, thermal and vapor protection in an all-in-one barrier component. It can be horizontally installed with nearly any type of exterior rainscreen system, from single skin and modular metal to brick and ACM panels. This unique insulated metal panel wall system, which spans up to 24” o.c., introduces new standards when it comes to cost savings, design integrity, and sustainability. The BW Universal System eliminates the need for multiple work crews as it is quickly installed in a single step. It not only expedites close-in/dry-in building times, but rather reduces the likelihood of improper installation as well.
| Coverage Width | 32”*, 36” |
| Thermal Values – R-Value & U-Factor | U-Factor(BTU/h-ft2*fahrenheit) Panel Width: 36″ at 35 degrees 2″ = 0.062 3″ = 0.041 R-Value (h*ft2*F/BTU) Panel Width: 36″ at 35 degrees 2″ = 16.7 3″ = 25.1 |
| Exterior Face | AZ-50 aluminum-zinc coated steel in 29 Ga. with epoxy primer finish |
| Interior Face | AZ-50 aluminum-zinc coated steel in 29 Ga. with epoxy primer finish |
| Joint | Tongue-and-groove with concealed fastening |
| Core | Foamed-in-place polyisocyanurate |
| Length | 12’-0” or 20′-0″ Horizontal |
| Thickness | 2”, 3” |
Design Features and Benefits
- Provides air, water, thermal and vapor barrier in one step
- Allows you to use multiple façade options while not reducing thermal efficiency
- Easy and fast installation, with reduced construction and labor costs
- Encloses the building faster in all weather conditions
Download Our Literature
Metl-Span® BW Universal System™ For Commercial & Industrial Buildings
2012 Master Format™ Section
All specifications and designs are subject to change without notice.
Load Span Tables
The Load Span Tables below are based on Allowable Stress Design (ASD). For loads calculated based on ASCE 7-10 (LRFD), please refer to section 2.4.1 of ASCE 7-10 for the applicable load combinations using Allowable Stress Design.
For FM Global Requirements, click here
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TESTING: BW Universal System™
| Test/Approval | Test Method | Test Title | Results |
|---|---|---|---|
| Fire US | ASTM E84 | Surface Burning Characteristics of Building Materials | Flame Spread < 25, Smoke Developed < 450 |
| NFPA 259 | Test Method for Potential Heat of Building Materials | Potential heat of foam plastic insulation contained in the assembly tested in accordance with NFPA 285 | |
| NFPA 285-19 | Evaluation of Fire Propagation Characteristics of Exterior Non-Load Bearing Wall Assemblies | Representative mockup tested in accordance with NFPA 285-19. Requires one layer of ⅝-inch Type X gypsum board on the interior side of the steel framing of the panels. Contact Metl-Span for complying wall assemblies. | |
| Structural | ASTM E72 | Standard Test Methods of Conducting Strength Tests of Panels for Building Construction | See load/span tables |
| Thermal Performance | ASTM C518 | Steady-State Thermal Transmission Properties by Means of the Heat-Flow Meter Apparatus | K-Factor of 0.119 BTU.in/hr.ft2.°F at 35° F mean core |
| ASTM C1363 | Thermal Performance of Building Materials and Envelope Assemblies | See Thermal Performance Guide | |
| Air Infiltration | ASTM E2357 | Rate of Air Leakage Through Curtain Walls Under Specified Pressure Differences | Maximum Air Infiltration Rate of 0.002 cfm/sq. ft. at a static-air-pressure difference of 1.57 psf |
| Water Infiltration | ASTM E331 | Water Penetration of Exterior Walls by Uniform Static Air Pressure Differences | No uncontrolled leakage when tested to a static pressure of 15 psf for 15 minutes No uncontrolled leakage when tested at a differential pressure of 6.24 psf for 2 hours (per International Build Code – Chapter 14) |
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