Fire truck manufacturing and the planning required to build a fire truck is a detail-oriented, step-by-step process which requires precision, ingenuity and a great deal of expertise. From the very first cut of sheet metal to the final apparatus delivery, there are processes in place to ensure each custom apparatus is crafted to exceed customer expectations and perform like no other.

The team that designs and builds Pierce custom fire apparatus does so in over 2.1 million square feet of design, manufacturing and assembly space. Our Wisconsin facilities have over 1.67 million total square feet of floor space. Our Florida facilities have 485,000 square feet of floor space.

Through continued innovation, research and development, Pierce Manufacturing has remained at the forefront of advancing technology and fire truck manufacturing practices. Our experienced team and dealer network offer detailed consultation and planning services to ensure each apparatus order meets the unique needs and specifications of the customer. The production of custom fire apparatus helps support communities worldwide, and Pierce is up to the task.

Take a look at the detailed process to build a fire truck as explained below. It demonstrates the labor and devotion which goes into every cubic inch of a new fire truck.

Fire Truck Metal Fabrication Process

The first step to build a fire truck involves several metal fabrication processes. To start, sheet metal is cut using a combination of lasers, turret punches and water jets. To name a few, this includes cab and body components, sub-assemblies which go into the frame (such as bumpers and cross members), cab doors and sidewalls.

Recent investments in fabrication equipment have increased capacity, precision and consistency across these processes:

• Cutlite-Penta Fiber Plus Bevel 30K Laser: A new Cutlite Penta Fiber Plus Bevel 30K Laser cuts steel of various thicknesses at a high speed and adds bevels in the same pass, reducing downstream work and helping increase the delivery rate of structural components.
  
• Folding Machine: A new folding machine forms large steel and aluminum components with automated tooling, to help enhance precision, operator ergonomics and cycle times.
  
• 150-Ton Press Brakes: New 150-Ton press brakes use offline 3D programming help to minimize manual calculations, speed changeovers and enhance consistency on cab components and other formed parts.

Once metal fabrication is complete, a fire truck begins to take shape in welding operations.

When a fire department is thinking about building a fire truck, how do they get started? Read our latest resource Fire Apparatus Design: A Step by Step Guide.

Welding Operations

Welding and fabrication form the structural backbone of each Pierce fire apparatus. Once the parts for an assembly or sub-assembly are fabricated, the welding process begins. 

Pierce has several departments in the welding operation; each is tasked with a different type of part or process step. From fire truck cabs to bodies to pump structures and other subassemblies, experienced welders create customized fire truck components with precision.

Introducing production advancements and new technologies across fabrication and welding is helping Pierce enhance operator safety and grow capacity, while also prioritizing safety and efficiency. Recent  welding operation investments include:

• Automated Rail Welding: A new automated welding cell manages welding operations for the aerial device base rails. For customers, automated welding means strong, reliable welds.
  
• Handheld Laser Welding: Handheld laser welding complements traditional welding and is used in very specific use cases where clean seamless welds are desired, like stainless-steel fluid-fill spouts.

All welders receive the same Pierce Custom Welding Certification. In addition, Pierce has certified welding inspectors (CWI) onsite to ensure quality and superior craftsmanship for all apparatus orders.

Beyond investments in equipment, Pierce is optimizing how fabrication and welding operations flow together. Manufacturing layout design enhancements are already underway and aim to create more intuitive handoffs between fabrication, welding and downstream assembly.

Read more about our expansion and investments to support apparatus manufacturing capacity.

Painting Process

When the welding process is complete, the fire truck cab, body and parts are further prepared for final assembly with a protective coating or paint application process.

At this time, the frame rails and other requested parts undergo either electrodeposition coating (e-coat) application or hot-dip galvanization. Both processes increase performance longevity and provide corrosion, abrasion and chemical resistance.

In a parallel step, the fire truck components undergo a detailed painting process, following these important steps: 

• Sanding and surface preparation.
• Chemical cleaning and treatment to remove any grease, oil or other materials.
• Primer surface coat application.
• Hand-sanding with fine-grit sandpaper to create a smooth surface.
• Basecoat paint application.
• Clear coat paint application to help protect the surface and increase surface longevity, durability and create the glossy look.

Recent facility upgrades have enhanced Pierce's paint operations. Additional paint and metal finishing booths help to increase capacity and reduce lead times. Robotic primer, base coat and clear coat application help deliver consistent coverage across complex surfaces while reducing overspray. AI-enabled robotic buffing cells handle sanding, polishing and surface finishing with precision and reduces manual intervention. A relocated paint inspection light tunnel, now more centrally positioned on the production floor, helps enable faster handoffs from paint to inspection without disrupting downstream processes.

Once the paint has cured on the fire truck components, the assembly can begin. To review the automated paint line painting process in detail, view our blog now.

The Pumphouse Build: The Heart of Fire Trucks

When it comes to building fire trucks, one of the most complex and intricate assemblies is the pumphouse—the heart of the truck’s water flow system. This highly option-driven component requires a blend of welding, plumbing, assembly and electrical work, making it one of the most technically demanding aspects of fire truck manufacturing.

Precision Engineering and Customization

Every pumphouse is tailored to meet specific customer needs, from the type of fittings and valves to the location of controls. No two builds are exactly alike, as each fire department has unique requirements for how their truck will operate in the field. The high degree of customization ensures firefighters have the proper setup for efficiency and ease of use when responding to emergencies.

Built with Quality in Every Step

The build process is methodical, with in-process testing at multiple stages to ensure proper operation and leak-free performance. Our team progressively builds up the pump system, meticulously checking each component to ensure everything functions seamlessly. This step-by-step validation is critical for delivering a reliable and high-performing system to meet the rigorous demands of firefighting operations.

A Blend of Craftsmanship and Technical Expertise

Since the pumphouse is such a complex build, it demands some of the most advanced technical skills in our manufacturing process. From precise welding and plumbing to integrating electrical controls, our team ensures each unit is built with uncompromising quality and attention to detail.

At the end of the process, we don’t just assemble a pumphouse—we craft a mission-critical system firefighters depend on to protect lives and property. This is more than just a component of a fire truck; it’s the lifeline of firefighting operations, built with expertise, passion and a commitment to excellence.

Frame-Up, Cab and Chassis Assembly

During the chassis assembly phase of the fire truck build, a number of items come together in parallel, including the sub-assemblies within the frame rails, wheels and axles, engine and transmission, and the cab.

Frame-up brings the frame rails together into a squaring fixture, installing cross members, mounting axles and suspension components, and outfitting the wheels and tires.

Once frame-up is complete, the frame assembly continues into the chassis assembly process. Harnesses are put in place and air lines and sub-assemblies for the air system are installed. The engine, radiator, cooling package and exhaust systems are also installed. As these elements come together, the cab is assembled and is almost ready to be mounted.

Cab assembly is unique because it starts from the outside and moves in. The first steps involve the assembly of the instrument panel, doors, electrical systems, insulation, walls and headliners. Once walls and headliners are installed, the interior assembly begins. Seats and EMS compartments are installed, steering systems are added and interior components begin to look more like a fire truck.

Through each stage of the assembly processes, there are quality checks along the way. This ensures that each stage of assembly is up to Pierce’s high-quality standards.

When the frame-up, chassis and cab assemblies are complete, the fire truck is almost ready for final assembly. The chassis fluids are topped off, and the engine is started for the first time. At this point, the electrical system programs are loaded, and the axle steering and suspension parameters are set. Other final adjustments are made at this time.

Final Assembly

When someone asks ‘how do you make a fire truck?,’ this is the step that may make the most sense—final assembly.

In this step, final assembly of the fire truck and interior finishing begins. As the cab and chassis come together, the sides of the body and rear are assembled. This includes the installation of harnesses, compartment shelving, lights and fender crowns.

Once the painted body is assembled, it is mounted on the chassis along with the water tank. From here, all the electrical and mechanical components are installed, including cord reels, breaker boxes, body doors and any additional shelves, trays and lights.

As the fire truck comes together, the electrical and plumbing systems are finalized. If the fire truck requires an aerial device, the assembly of the necessary components is also taking place at this time. As the fire truck body and aerial device are finalized, assembly and testing of those components begin.

Making Advanced Manufacturing Possible with Facility Upgrades

With recent expansions and upgrades, Pierce Manufacturing has strategically transformed its facilities to enhance manufacturing capabilities and customer experience.

The facility upgrades demonstrate Pierce Manufacturing's commitment to operational excellence, technological innovation and superior product delivery. Investments in infrastructure and recent expansions have touched multiple aspects of the business, from customer meeting spaces to employee workspaces, with a consistent emphasis on safety, innovation and efficiency.

Read more about our infrastructure and facility enhancements and innovations in our recent facilities upgrades blog series.

Testing and Final Checks

In the final stages of fire truck manufacturing, the components and systems are tested for safety, accuracy and performance, including but not limited to the following:

• The vehicle steering, suspension alignment and ABS systems are calibrated.
• The pump is tested and third party certified for performance.
• Foam systems are calibrated.
• Electrical systems are tested and third party certified for performance.

Once Pierce team members are finished testing the fire truck, a third party inspector completes an independent review to verify the truck meets or exceeds all NFPA specifications. 

If the fire truck includes an aerial device, there is a comprehensive aerial testing and inspection process, which involves taking the ladder through its range of motion and testing all components. A third party inspection follows to verify the aerial device meets or exceeds NFPA specifications.

When all of the final testing is complete, graphic application can begin. Custom graphics are applied by the Pierce team, and the truck is now ready for the final inspection process.

Final Inspection and Delivery

The final step in the manufacturing process to build custom fire trucks allows fire department representatives the opportunity to inspect new fire trucks and test components. Over the course of the final customer visit, the truck will be evaluated to ensure the truck meets the customer’s expectations. The three-step final inspection process concludes with the delivery of the completed apparatus.

The fire truck manufacturing process at Pierce Manufacturing is a highly-efficient, detailed-focused process designed to create custom apparatus that fire departments are proud to drive and use. If you’d like to learn more about how to order a custom fire apparatus, find a dealer near you.

Do you have any questions about the fire truck manufacturing process? Leave us a comment below and we’ll answer it for you