Founded in 1995, Shelter Works designs and manufactures custom fiberglass-reinforced plastic shelters, buildings, cabinets, and equipment enclosures for protecting critical field infrastructure. With two manufacturing facilities and more than four decades of combined experience in custom fiberglass construction, the American manufacturer is known for its proprietary FiberBeam™ technology, engineered-to-order designs, and a 25-year warranty. Its shelters serve demanding settings from water treatment and natural gas operations to telecom and aviation, including FAA-compliant frangible enclosures.
ACMA Certified Composite Technician (CCT)
CAN/ULC S107 (2010) Class C Roof Fire Rating
Compliance program
ASTM E108 (2011) Class C Roof Fire Rating
Compliance program
State Modular/Industrial Building Program Certifications
State Labels and PE Certifications
Compliance program
ACMACCT
Quality certification
ASTME108CLASSC
Quality certification
Signature Enclosures IncWith roots in the fiberglass industry stretching back more than 50 years, Signature Enclosures Inc. manufactures fiberglass enclosures for demanding industrial applications. The Avondale, Pennsylvania company has specialized in these products for 30 years, designing NEMA 4X enclosures—including insulated models—for equipment exposed to corrosive conditions and temperature extremes. Its in-house tooling and engineering support allow the company to modify standard designs without treating each project as a special order.AVONDALE, PA
Fortress Fabric StructuresFor more than 20 years, Fortress Fabric Structures has designed and delivered custom tension-fabric buildings, including clear-span shelters and aircraft hangars, for demanding industrial and government applications. The family-owned company handles the full project lifecycle—from engineering and steel and fabric fabrication through installation, maintenance, and repairs—and operates a 110,000-square-foot fabrication facility. Its work includes a 40,000-square-foot expeditionary hangar for the U.S. Navy in Bahrain and a 133-by-271-foot composting facility engineered for winds exceeding 150 mph.332311ELKINS PARK, PA
MFG Construction & Water ProductsMFG Construction & Water Products manufactures fiberglass and fiber-reinforced plastic (FRP) products for construction and water and wastewater treatment applications. The business traces its roots to MFG Construction Products, established in 1962, and MFG Water Treatment Products, which began producing fiberglass water-treatment products in 1971. It provides custom product development and production through its North American manufacturing network.ASHTABULA, OH
Seal Reinforced Fiberglass, IncFounded in 1963 by Thomas Kaler, Seal Reinforced Fiberglass is a family-managed Copiague manufacturer that custom-designs and fabricates fiberglass components, from architectural restorations to elaborate displays and sculptures. Kaler’s sons now carry forward his custom FRP experience, giving the 30-person company more than 100 years of combined field knowledge. Working from design and engineering through tooling, prototyping and production, Seal operates from a fully owned Long Island factory and has completed projects ranging from Wagner College and The Plaza Hotel to museums and installations overseas.COPIAGUE, NY