The World's Largest Access Door Store™
Williams Brothers and Bilco Fire & Smoke Vents are designed to provide efficient and secure service access to critical areas on roofs for a wide range of commercial, industrial, institutional and residential applications. Ideal for both new and retrofit building projects, our floor and roof hatches and doors are suitable for use on a variety of surfaces enabling easy access to mechanical, electrical, plumbing and other building systems.
Williams Brothers and Bilco Fire & Smoke Vents are available in a wide range of sizes designed to meet common roof access requirements with special sizes and modifications available upon request. Popular sizes include 48×48, 48×72, 48×96, 60×60, 60×96 and more. We also offer many additional features such as drainage troughs, locks, gasketing, choice of finishes and custom color paints.
Williams Brothers prides itself on the differences we bring to our products. We chose to represent the Bilco line of hatches based on their reputation for high quality, innovative products.
Single Leaf: Our heavy-duty, WB SVG Series Galvanized Steel Automatic Smoke Vent features fire ventilation for areas where removing deadly smoke, heat, and gases is required from a burning building. Featuring a single leaf door and rugged 14 gauge G90 galvanized steel construction, this automatic smoke vent includes a 12″ insulated curb, interior and exterior manual releases, and high performance gas springs.
Double Leaf: Our heavy-duty, WB SVG-DL Series Galvanized Steel Double Leaf Automatic Smoke Vent features fire ventilation for areas where removing deadly smoke, heat, and gases is required from a burning building. Featuring a double leaf door for a larger vent opening and rugged 14 gauge G90 galvanized steel construction, this automatic smoke vent includes a 12″ insulated curb, interior and exterior manual releases, and high performance gas springs.
