Underground Enclosures Manufacturer

Polymer Concrete Vaults

Heavy-Duty Protection for Critical Systems

Our Polymer Concrete vaults are built to endure. Manufactured using a proprietary blend of polymers and aggregates, these enclosures offer exceptional strength, chemical resistance, and longevity in demanding environments.

Applications: Electrical distribution, fiber optics, broadband, CATV, and municipal infrastructure.

Features:

  • Up to H-20 rating for high-load environments
  • Corrosion & freeze/thaw resistant
  • Buy American Act compliant
  • Customizable Options: Conduit entries, cable racks, grounding kits
  • Sizes Available: From 12″x12″ to 48″x96″x48″

FRP Underground Enclosures

Lightweight. Durable. Efficient.

Our FRP enclosures provide a lightweight alternative to traditional concrete, without compromising strength. Ideal for projects requiring fast installation and reduced labor costs, FRP vaults are stackable, crack-resistant, and built to perform.

Applications: Telecom, fiber, low-voltage electrical, and traffic signal systems.

Features:

  • Tier 15
  • Impact & crack Resistant
  • Nestable for easy transport & storage
  • Environmentally friendly: Made with recycled materials

Why Terra-Vaults?

  • Made in the USA — Manufactured in Gainesville, TX, supporting American jobs and ensuring consistent product quality.
  • Engineered for Longevity — Designed to last for decades in demanding underground environments, with resistance to corrosion, impact, and freeze/thaw cycles.
  • Flexible Configurations — Available in multiple sizes with customizable accessories including conduit entries, cable racks, grounding kits, and stainless steel hardware.
  • Trusted Nationwide — Serving contractors, municipalities, and utilities across the United States with reliable, Tier-rated handholes and vaults.
  • RUS / ANSI / SCTE 77 Approved — Built to meet or exceed industry standards for safety, performance, and structural integrity.
  • Buy American Act Compliant — Ideal for federally funded infrastructure projects and government contracts.

Have questions or need a quote?

Our team is ready to support your project with expert guidance and fast, reliable service.

Whether you’re planning a new installation or looking for product specifications, we’re here to help you find the right solution.

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