Box Culverts

Standard & Custom Sizes

Designed for stormwater systems, road crossings, and major infrastructure projects, our box culverts are made from 50MPa precast concrete and comply with AS1597 standards. Available in a range of standard sizes or built to your specifications.

Compliance & Approvals

  • RMS B80 (NSW), TMR (QLD), and VicRoads approved
  • RMS R16, R11 and TMR designs available on request
  • AS5100.2 compliant for load-bearing structures

Fast Installation

  • Precast off-site for reduced labour and faster delivery
  • Includes lifting anchors and optional features like ferrules, pipe penetrations and link slabs

Contact us today for pricing on standard or custom box culvert sizes.

Make an Enquiry

Product Specification

Explore more specs using the arrow beside each width, or refine results using the filters below.

Technical Details

We offer a range of box culvert sizes suited for stormwater systems, road crossings and large infrastructure projects across Australia. Whether standard or custom, we provide engineered solutions in a variety of box culvert dimensions for all load conditions, such as:

  1. Small box culverts: Spans from 300mm to 1200mm that are compliant with AS1597.1-2010.
  2. Large box culverts: Spans up to 4200mm that adhere to AS1597.2-2013.
  3. Fill height options: Standard 0-2m, with engineered solutions for higher loads.
  4. Custom lengths available: 1.2m & 2.4m standard along with modifications on request.

Our box culverts are built for high-load performance with 50 MPa concrete to guarantee strength and durability. This mix resists cracking, fatigue and pressure from traffic and soil loads, making it ideal for roadways, bridges and drainage. A 25mm reinforcement cover protects steel from corrosion to extend the lifespan in moisture-prone areas. For heavy loads, multi-cell configurations, link slabs and base slabs enhance stability, load distribution and structural integrity.

Every box culvert meticulously meets strict Australian infrastructure regulations, ensuring safety, durability, and long-term performance in civil and construction projects.

They are manufactured in compliance with:

  • 1-2013: Small box culverts (up to 1200mm).
  • 2-2013: Large box culverts (1500mm – 4200mm).
  • 2: Structural and vehicle load-bearing compliance.

As an ISO 9001 Certified manufacturer, we uphold rigorous quality control, testing, and compliance with national and state engineering standards. Our box culverts are approved for major infrastructure projects by state authorities, including:

  • RMS B80, R16, R11 (NSW): Approved for road and drainage projects.
  • TMR (QLD): Compliant with Queensland transport infrastructure requirements.
  • VicRoads: Fully approved for highway and municipal applications.

Why Choose Civilmart Precast Concrete Box Culverts?

Civilmart’s box culverts are crafted for uncompromising reliability and compliance, making them ideal for stormwater drainage, bridges and road infrastructure projects. Manufactured to meet Australian standards, each box culvert delivers trusted durability while offering a cost-effective and quick installation alternative to in-situ solutions, to proudly offer our clients:

Precast Box Culvert Efficiency:

Manufactured off-site for faster installation, reduced labor and immediate load-bearing capability.

Customisation Options:

Available with ferrules, pipe penetrations, cast-in openings and link slabs for project-specific needs.

Australian Standards Compliance:

Certified to AS1597.1, AS1597.2, AS5100.2 and approved by RMS B80 NSW, TMR QLD and VicRoads.

Looking for a box culvert price list? Contact us today for a quote on standard and custom sizes.

Let’s Build Something Better

Talk to our experts and get a tailored quote that supports your project — and helps shape the communities of tomorrow.

Speak to an Expert

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Civilmart have supplied box culverts on a number of occasions to my projects. I have always found the service provided excellent and value working with them over their competitors on any complicated design or logistical projects.

Daniel Palmer – Project Manager, TRN Group

Civilmart has everything we need in regards to civil for our projects, with no shopping around required and great customer service.

Jamie Beer – Coops Drainage & Civil

We use Civilmart due to the excellent customer service and exceptional time turnaround on products required for a range of plumbing work. The staff are friendly and knowledgeable and always provide the results required to ensure a smooth installation on-site. The high-quality products and product range ensure we always go with Civilmart.

Shaun Murray – Collins Plumbing Group

We have used Civilmart for many years, their products have always been and continue to be of a high quality. Their customer service is excellent and they are always willing to go above and beyond to meet our requirements.

Jason Costall – Costall Drainage

Civilmart deliver a great product and always give good customer service, even when they’re under the pump. I think they’re doing a great job and I’m really happy with the quality of the products I believe it’s the highest around.

Karl Hauschildt – KS Wastewater

Civilmart provide quality products that meet industry/council standards. The team are always responsive to our requests and will bend over backwards to ensure our products are delivered on time. Always happy to accommodate at short notice with stock readily available.

Leo Biggs – Alzino & Co. Earthmoving Pty Ltd

Diston Wastewater Technology has purchased concrete product from Civilmart and its associated companies for the past 30 years. In all that time we have found Civilmart to more than accommodating when it comes to supply of product, custom concrete mixes and rectifying any issues that may arise. This is crucial to Diston, as an ISO9001 and Engineers Australia certified company, we rely on a high-quality product and a good name in the industry to thrive in business.

Matthew Diston – Diston Wastewater Technology

We use Civilmart due to the excellent customer service and exceptional time turnaround on products required for a range of plumbing work. The staff are friendly and knowledgeable and always provide the results required to ensure a smooth installation on-site. The high quality products and product range ensure we always go with Civilmart.

Shaun Murray – Collins Plumbing Group

When you have been in business for as long as we have, the value of service and quality is paramount to success. Civilmart have been a major supplier with us for years and we credit a lot of our success through such great suppliers. Thanks to Jay and the Civilmart team for all your support.

Steve Withers – Vic Plumbing and Drainage

FAQs

Supply & Distribution in VIC, NSW, WA, SA & QLD

With a variety of in-house brands—such as Rocla box culverts—our range is available for immediate delivery nationwide to empower projects to stay on schedule. Standard sizes ship within days, while custom orders meet specific engineering requirements.

Compliance & Approvals in VIC, WA, SA & NT

Each box culvert is pre-approved for various infrastructure applications, providing ready-to-use solutions for engineers and contractors. For coastal, high-traffic, or flood-prone projects, we offer custom configurations to meet environmental and load-bearing requirements.

Stormwater Drainage Systems

Our box culverts enable efficient water flow, flood prevention and long-term infrastructure protection. Designed for urban and rural settings, they help manage runoff, prevent erosion, and reduce water buildup. Built to AS1597 standards, they handle high-flow conditions without degradation.

Bridge and Platform Construction

For high-load infrastructure, our box culverts provide robust support for bridges, rail platforms, and overpasses. Engineered for durability, they withstand dynamic loads from vehicles, freight, and pedestrians. Each unit meets AS5100.2 standards, ensuring compliance with Australian road and railway load regulations.

Base Slabs & Link Slabs

Base slabs improve stability while reducing on-site work, making them a cost-effective installation option. Link slabs optimise load distribution to allow seamless connectivity between box culverts in high-capacity drainage and roadway systems.

Contact Us

Don’t hesitate to contact us.

Civilmart provides innovative solutions, for tomorrow.

Civilmart delivers reliable infrastructure solutions engineered for performance today and built to withstand tomorrow.

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