GPX® Curtain Wall Series is a 60-120 minute fire resistive framing system for multi-story spans of glass.It is fully vetted for exterior performance with static & dynamic water pressure testing, air infiltration testing, thermal cycling & condensation evaluation, and structural, seismic, and interstory displacement testing. Ideal for property line and wildfire/urban interface situations.Provides the clean appearance of conventional aluminum framing with uniform sightlines.It is available in standard and custom finishes including high performance paint by PPG, clear anodized, bronze anodized, black anodized, Decoral®, wood veneer, ornamental metal and more.Standard 5 year limited warranty.USA manufactured for fast lead times and competitive pricing.