
Is Your Enclosure Slowing You Down? A New Study Says It Might Be
Staying on schedule is one of the toughest challenges in underground infrastructure work. Between tight labor windows, limited equipment availability and pressure to meet service
if (is_user_logged_in()) ?> if (!is_user_logged_in()) ?> if($_POST["newuser"]==1) ?>
Tier 15 and 22 rated. Lighter lifts, safer installs, and faster field modifications, without compromising strength, safety, or specification requirements.
Duralite® enclosures deliver the performance infrastructure crews need with the handling ease they have been asking for. Designed for strength, field usability, and jobsite efficiency, Duralite helps crews reduce heavy equipment needs, simplify installation, and keep projects moving.
The latest Duralite enhancements were shaped by customer feedback and real-world installation experience, including built-in racking slots, conduit knockouts, flat work surfaces, and improved stackability.
Download the Duralite Time Study White Paper to see how reduced weight, faster installs, and smaller crews can translate into measurable project savings.
Duralite® composite handholes combine load-rated strength, lighter handling, and field-ready design features to help crews work more efficiently. Built-in conduit knockouts, mouse holes, rack slots, and flat work surfaces simplify modifications in the field and help reduce installation delays.
With Tier 15 and Tier 22 rated options, flame-resistant materials, and durable composite construction, Duralite supports telecom, fiber, electric, transportation, and municipal utility applications where safety, speed, and performance matter.
Traditional concrete and polymer concrete handholes can add weight, equipment needs, and field complexity to underground utility projects. Duralite® composite handholes are designed to reduce those challenges with a lighter, field-ready enclosure that helps crews install faster and work more efficiently.
Compared to heavier enclosure materials, Duralite makes handling, placement, and field modifications easier without giving up the strength and durability required for demanding infrastructure applications.
For telecom, fiber, electric, transportation, and municipal utility projects, Duralite provides a practical alternative where speed, safety, and long-term performance all matter.
Ready to plan your next underground utility project?
Talk with our team about Duralite® performance, installation considerations, and product options for your application.
From lighter handling to field-ready modifications, Duralite® helps crews reduce installation complexity while supporting strength, safety, and long-term performance.
Duralite® holds up where others crack. Tier 15 and Tier 22 load ratings are proven in the field, not just on paper. Stackable designs make it easy to go deeper without extra parts or wait time.
Most units install safely with a two-person crew—OSHA-compliant and no heavy machines required. Conduit knockouts, mouse-holes, and built-in rack slots help keep the job moving fast.
With just a cordless drill and hole saw, crews can cut, notch, and mount on site—no dust clouds and no special tools. Larger flat work areas make drilling cleaner and faster.
Meets ASTM D635 standards for flame resistance. Safety is built into every unit with no add-ons and no exceptions.
Standardized slots and off-the-shelf accessories—like cable racks, pulling eyes, and EMS markers—keep field crews moving without custom orders or workarounds.
Duralite® helps cut fuel use and emissions by eliminating the need for heavy trucks and equipment. With a safer, phosphorus-based flame retardant, it is gentler on people, ecosystems, and the planet.
Access product brochures, comparison sheets, installation guides, and technical resources to support planning, specification, and field installation.

Staying on schedule is one of the toughest challenges in underground infrastructure work. Between tight labor windows, limited equipment availability and pressure to meet service

As a Thermoplastics Materials Engineer at Oldcastle, I am deeply involved in developing materials that offer protection in critical situations. My previous article highlighted how

As I woke up on Labor Day morning ready to make the most of the final days of summer, I looked outside and saw billowing
Duralite handholes are lightweight, below-grade composite enclosures engineered to provide secure access to underground electrical, telecommunications, fiber optic, and utility infrastructure.
They protect splices, terminations, valves, sensors, and equipment while supporting a wide range of load ratings and site conditions.
Duralite handholes are manufactured using a proprietary composite formulation of engineered resins and graded mineral aggregates, delivering high compressive strength, low moisture absorption, and excellent environmental resistance.
Duralite composite handholes are commonly used in:
Compared to traditional concrete handholes, Duralite composite handholes are:
Duralite handholes are manufactured from an advanced composite material combining polymer resins and mineral aggregates.
This engineered blend provides structural strength, durability, and long-term resistance to environmental exposure.
Duralite handholes contain up to 65% recycled material, helping reduce environmental impact without compromising structural performance or load capacity.
Yes. Duralite handholes are 100% recyclable and can be processed at the end of their service life for reuse in future composite material applications.
Yes. Duralite supports sustainability through:
In 2024, Oldcastle Infrastructure enhanced Duralite’s material chemistry by transitioning from brominated or halogenated flame retardants to a phosphorus-based, halogen-free flame-retardant system.
Halogen-free flame retardants help:
Learn more:
Yes. Duralite handholes are designed to meet or exceed:
Duralite handholes are available in multiple load ratings, including:
Yes. Duralite handholes can be easily modified in the field using common tools and can be ordered with optional:
Typical installation includes:
In most cases, no. Duralite’s lightweight design allows for manual handling and placement. Lifting hooks are available for larger or pre-assembled units when needed.
Yes, with proper installation practices. Anti-flotation measures such as appropriate backfill, drainage systems, or ballast may be required depending on site conditions.
Duralite handholes provide:
Yes. Duralite composite handholes resist:
When properly installed, Duralite handholes are designed to provide decades of service life with minimal degradation or maintenance.
While the initial unit cost may be higher than concrete, the total installed cost is often lower due to:
Cost savings are driven by:
Yes. When specified with the appropriate load rating and installed per guidelines, Duralite handholes are suitable for roadway and DOT environments.
Yes. Duralite composite handholes are widely used in telecommunications and fiber networks due to their configurability, lightweight installation, and compliance with ANSI/SCTE standards.
Yes. Duralite handholes are well-suited for housing sensors, valves, and monitoring equipment, especially where sensitive electronics or communications components are present.
Duralite handholes can be specified in:
Explore common Duralite underground enclosure sizes and configurations for telecom, fiber, electric, transportation, municipal, and utility infrastructure applications.
Looking for a quote for your project?
While browsing our products, select “Add to Quote Generator” to quickly get an estimate for everything you need.
We use cookies to offer you a better browsing experience, analyze site traffic, personalize content, and serve targeted advertisements. Read about how we use cookies and how you can control them by visiting our Cookie Statement. If you continue to use this site, you consent to the use of cookies.