Welcome to NGG LTD., INC. |
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 NGG is a custom curtain wall company founded in 1982. Since that time NGG has been in the core business of design, manufacture and installation of custom curtain wall systems. Our solutions include curtain wall systems glazed with insulated glass, laminated glass, metal panels, stone, tile, mesh screens and sunscreens. In addition NGG has designed, manufactured and installed skylights, canopies and blast rated curtain wall systems. Over 90 percent of our projects are uniquely customized solutions. With an industry proven track record of 25 years and more than 250 projects NGG has the capability and experience to meet any architect’s imagination and vision by providing a fully integrated solution. Our system will meet the most challenging aesthetic design intent and rigorous technical standards.
   
Our systems undergo the most rigorous independent laboratory testing. As an example our Pinnacle Series Curtain Wall is a 7 ½ by 3 inch system structurally glazed vertically captured at the head and sill. This system meets the following performance criteria:
Static Air Infiltration (ASTM E 283) at 6.25PSF (50 MPH wind and 1.2” Water) Air infiltration shall not exceed .06 CFM per square foot of fixed wall
• Performance Results .02 CFM per square foot or 7.5 CFM gross leakage. Dynamic Water Infiltration (AAMA 501.1) at 100 MPH slip stream velocity creating 77 MPH wind at the wall equivalent to 15 PSF. Water shall be applied at a rate of five gallons per hour per square foot for 15 minutes. No uncontrolled water leakage shall be allowed, including visible water on exposed interior surfaces that is not contained and weeped to the exterior.
• Performance Results no uncontrolled water infiltration Vertical Displacement Three complete cycles with each cycle consisting of ½ inch movement upward, return to zero, ½ inch movement down, and return to zero. There shall be no failure of the system including gasket disengagement, sealant failure or permanent distortion of any wall component.
• Performance Results no failure of the system Structural Design Load (ASTM E 330) Held for ten seconds duration for both 50% and 100% loads. Deflection of framing members shall not exceed L/175 of the clear span or .68” vertically and .33” horizontally.
• Performance Results no vertical of horizontal member exceeded the allowable deflection criteria with a maximum recorded vertical deflection of .31” and horizontal deflection of .090” Seismic Lateral Racking Three (3) complete lateral cycles with each cycle consisting of ¾” horizontal movement to the left, return to zero, ¾” horizontal movement to the right, return to zero. There shall be no catastrophic failure of the system.
• Performance Results there was no failure of the system noted Seismic Perpendicular Racking Three (3) complete cycles with each cycle consisting of ¾” horizontal movement in, return to zero, ¾” horizontal movement out, return to zero. There shall be no catastrophic failure of the system.
• Performance Results there was no failure of the system noted |
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