InPlant Offices Incorporated is a premier manufacturer of modular building systems and prefabricated structural solutions based in Saint Louis, Missouri. Established in 1987, the company operates as a contract manufacturer and OEM, specializing in custom-designed prefabricated offices, partition wall systems, and portable booths. With a workforce of 11 to 50 employees and an estimated annual revenue of $5.3 million, InPlant Offices serves a diverse range of industries, including automotive, aerospace, pharmaceutical, retail, and government facilities.
The company's extensive product portfolio includes equipment enclosures, controlled environments such as cleanrooms and temperature-controlled rooms, guard shacks, and ticket booths. Their modular systems are engineered for maximum flexibility, allowing for expansion, reconfiguration, or relocation. Manufacturing capabilities feature systems constructed from 1¾˝ or 3˝ thick painted steel, or 3˝ thick anodized extruded aluminum, with specialized options like Fiberglass Reinforced Plastic (FRP) panels and noise control barriers. These structures are designed to meet rigorous standards, with load-bearing roofs capable of supporting up to 125 pounds per square foot and clear spans up to 40 feet.
InPlant Offices provides comprehensive end-to-end services, including custom engineering, project management, precise fabrication, and professional installation. Their solutions address critical operational needs such as safety enclosures for hazardous equipment, laser enclosures, and administrative spaces within warehouse environments. By utilizing a nationwide network of representatives, the company delivers tailored modular solutions that improve operational efficiency and provide significant tax and installation advantages over traditional construction.
Warehouse Wall Systems & Temporary Offices with Roof Storage
Modular Walls & Prefabricated Office Buildings
Signature Enclosures INC.
🇺🇸 United States
198911-50 peopleManufacturer
Established brand
OEM manufacturer
ODM manufacturer
Product customization
Key market
North America
Description
Signature Enclosures INC. is a specialized manufacturer and contract manufacturer of high-quality fiberglass enclosures, headquartered in Avondale, Pennsylvania. Founded in 1989, the company has established itself as a leader in Fiberglass Reinforced Plastic (FRP) solutions, serving critical industries such as chemical processing, petroleum, pharmaceuticals, marine, mass transit, and water treatment. The company operates a dedicated production facility with in-house tooling capabilities, allowing for rapid prototyping and cost-effective custom manufacturing.
Their core product portfolio includes the Signature Series and Safe Haven Series, featuring NEMA 4X rated enclosures that are corrosion-resistant, non-conductive, and impact-resistant. These products are available in various configurations, including free-standing, wall-mounted, and flush-mounted designs with single, double, or overlapping doors. Signature Enclosures specializes in insulated enclosures designed to maintain controlled atmospheres for sensitive equipment and chemicals in extreme weather conditions, utilizing fire-retardant resins and marine-grade gelcoats.
As an OEM and contract manufacturer, the company provides comprehensive engineering and design services at no additional charge, enabling clients to develop unique products tailored to specific industrial needs. Their capabilities extend to custom modifications, including specialized windows, stainless steel hardware, and custom color finishes. With a workforce of 11 to 50 employees and annual revenue between $1 million and $4.9 million, Signature Enclosures INC. maintains a strong reputation for durability and technical expertise in the North American industrial market.