Standard Step Blade

SP-445 Standard Step Blade

DESCRIPTION

4″ Deep High Performance Step Blade series; extruded aluminum construction; frame with channel profile; corner joints mitered and mechanically fastened, with continuous recessed caulking channel each side; intermediate mullions matching frame; gutters; rated for an air performance and water penetration maintained effectiveness rate tested in accordance with AMCA 500-L

WATER PENETRATION PERFORMANCE

• Free Area Velocity at Beginning Point of Water Penetration: 699 fpm (3.56 m/s)
• Air Volume Flow Rate at Beginning Point of Water Penetration — 48in (1220mm) x 48in (1220mm) unit: 4,728 cfm (2.23 m3/s)
• Pressure Drop at Beginning Point of Water Penetration: 0.072 in. H2O (18 Pa)

AIRFLOW PERFORMANCE

• Free Area: 44% , based on a test sample of 48in (1220mm) x 48in (1220mm)
• Airflow Classification—Class 2