Beam Line Fabrication: How a Beamline Fiber Laser Works

Every structural steel job eventually comes down to the same bottleneck: getting raw beams cut, coped, holed and marked fast enough to keep the fit up and welding crews busy. For decades, that meant a beam line built from separate saws, drill lines and coping machines, each with its own setup, its own operator, and its own pile of work in process waiting on the floor.

Automated beam processing changes that. Today’s beam line pulls part data straight from the detailing model, measures the actual beam, and makes every cut in one pass. The newest systems replace saw blades, drill bits and plasma torches with a single tool: the H beam fiber laser (also called an I beam fiber laser ).

This guide explains how beam line fabrication works step by step, how fiber laser beam lines compare with traditional setups, and what to look for when you invest in structural fabrication equipment. It’s written for both the owner signing the purchase order and the engineer or production manager who has to make the machine pay off.

This guide explains how beam line fabrication works step by step, how fiber laser beam lines compare with traditional setups, and what to look for when you invest in structural fabrication equipment. It’s written for both the owner signing the purchase order and the engineer or production manager who has to make the machine pay off.

A beam line is an automated production cell that turns raw structural sections into finished, ready-to-weld parts. It typically handles wide flange (I and H beams), channels, angles and, on some systems, tube and HSS. Material moves through on infeed and outfeed conveyors while CNC-controlled tools perform the operations a fabricator used to do by hand with a tape, torch and mag drill.

A traditional beam line is usually a chain of separate machines:

• Band saw: cuts beams to length and handles miter cuts.
• Drill line: drills bolt holes in the web and flanges, often with multiple spindles.
• Coping machine (or plasma coper): cuts copes, notches, rat holes and weld-access holes.
• Layout marking: scribes or prints part marks and fit-up lines, sometimes as a separate station.

Each machine does its job, but every handoff adds transfer time, floor space, and another chance for a tolerance error to stack up. We estimate that a saw-and-drill line can need 60 to 80 meters (roughly 200 to 260 feet) of floor length. That’s one of the problems that modern structural fabrication equipment is designed to solve.

Whatever tooling a beam line uses, automated beam processing follows the same basic flow from model to finished part.

1. Import the part data. The detailer exports part files (commonly DSTV/NC1) from a BIM platform such as Tekla Structures. The beam line software reads the section size, length, holes, copes and marks directly, so no one retypes dimensions at the machine.
2. Nest and sequence. The software groups parts onto stock lengths to reduce drop and sequences the work so parts come off in the order the shop needs them.
3. Load the beam. An overhead crane or cross-transfer places the raw beam on the infeed conveyor. Powered rollers and clamps position it for processing.
4. Measure the real beam. Rolled sections are never perfectly straight or square. Sensors scan the beam’s actual profile, including camber, sweep, flange tilt and web offset, and the control adjusts the toolpath to match the steel in front of it rather than the ideal shape in the model.
5. Cut, hole, cope and bevel. The machine makes every feature the part requires: end cuts, miters, bolt holes, slots, copes, weld-access holes and weld-prep bevels. On a traditional line this happens across several stations; on a fiber laser beam line, one cutting head does it all.
6. Mark the part. Part numbers, assembly marks and fit-up layout lines are etched onto the steel so the fitter knows exactly where connections go.
7. Unload and sort. Finished parts exit on the outfeed conveyor, ready for fit-up and welding, with little or no grinding or secondary drilling.

The goal of every step is the same: take the human error and the waiting out of the process. The fewer times a beam is handled, measured or re-set, the faster and more accurate the job.

An H beam fiber laser replaces the saw, drill line and coper with one high-power laser head that moves around the section on multiple axes. Instead of handing a beam from machine to machine, the shop loads it once and unloads a finished part.

Fiber laser beam lines are the newest generation of beam processing, built to replace plasma. Plasma beam lines took over much of the torch-and-mag-drill work, but they still leave dross to grind, struggle with small bolt holes, and often need manual scribing and drilling to finish a part. A fiber laser does all of that in one pass. Here’s how the three approaches compare in general terms:

The practical result is fewer steps between raw steel and fit-up. Clean edges mean less grinding, accurate holes mean faster bolt-up, and integrated bevels mean welders get parts ready for a full-penetration weld.

Fiber lasers also cost less to run than older laser technologies. They convert electrical power to cutting power efficiently and don’t need the mirrors, gas mixes and alignment work that CO2 lasers did.

Because the laser head rotates around the section, an I beam fiber laser can reach the web, both flanges and the ends of the beam without re-clamping. In a single setup it can produce:

• End cuts and miters at straight or compound angles.
• Bolt holes and slots in the web and flanges, including slotted holes for field adjustment.
• Copes and notches for beam-to-beam and beam-to-column connections.
• Weld-access holes (rat holes) sized and shaped to code.
• Weld-prep bevels on flanges and webs for full-penetration welds.
• Web openings for MEP penetrations and castellated or cellular beam patterns.
• Part marks and layout lines etched onto the steel for fit-up.

For a structural shop, this means connection details that once took a saw, a drill line, a coper and a fitter with a torch now come off one machine, already cut, holed, beveled and marked.

The Accurl H Beam Fiber Laser is Moore Machine Tools’ answer for fabricators who want a complete fiber laser beam line built for heavy structural work. Here’s what’s inside it and why each feature matters on the shop floor.

Accurl builds it as a ground-track gantry machine. The beam stays put on its supports while the gantry and five-axis cutting head travel along it. It processes H beams, I beams, channel and angle, and with an optional flat sheet section it cuts and bevels plate too.

Accuracy on long, heavy sections starts with the frame. The Accurl gantry uses a segmented, spliced structure built from high-strength steel and analyzed for vibration resistance and rigidity, so it holds its geometry over years of production. An external cover seals the critical components from dust and spatter, and the Z-axis is also built from high-strength steel for smooth, stable cutting.

A dedicated rotation-axis structure gives the five-axis cutting head ±90° of rotation on the A or B axis and ±90° on the C axis. That’s what lets one machine reach both flanges, cut the web and put a weld-prep bevel on the part without re-clamping. The bevel swing axis runs on a high-rigidity harmonic reducer with torsional stiffness up to 2,300 N·m and absolute positioning accuracy of 10 arc-seconds or better. It’s sealed to IP67 with all cables routed inside, and it’s rated to hold its original accuracy for more than 20,000 hours without regular maintenance or re-greasing.

• Tekla auto recognition reads part data from Tekla models, so programming is fast and connection details come straight from the detailer. G-code and other major formats are supported too.
• Contour scanning scans each section before cutting, builds a point-cloud model of the actual beam and compensates in real time for deformation. Holes and copes land where the drawing says, even on a welded or bowed beam.
• Nesting software (TubesT) imports Tekla and SolidWorks parts, nests them on stock lengths for maximum yield and automatically adds Z-joints, bevels and miter joints. It checks every cut against a model of the real cutting head to prevent collisions, and it can load a production list from Excel by part name and quantity.
• Locking cutting makes processing parameters easy to adjust and lock in for repeatable results.

A typical configuration pairs a 20 kW multi-module laser with 65′ infeed and outfeed conveyors, the five-axis head, nesting software, and installation and training. The laser also etches part marks and fit-up layout lines directly onto the steel, so fitters know where every connection goes. Zero-tail cutting means ports and shapes can be cut right to the end of the stock, and the stationary cutting setup delivers high accuracy with low energy use.

For a structural shop, that means base plates, gussets, stiffeners, shear tabs and connection plates can come off the same machine as the beams they bolt to. The five-axis head bevels plate edges for weld prep too, so there’s no separate plasma table or bevel station to buy, staff and find floor space for. Shops that run beams and plate on one machine keep the laser busy between beam jobs and cut the parts for a whole assembly in one place.

Moore Machine Tools brings more than 30 years of experience and more than 1,000 machines installed across the United States. Parts and consumables are stocked, and the team customizes configurations to fit each shop’s work. Owners can also ask about financing options and Moore’s service and training.

A beam line is one of the biggest investments a structural shop makes. Before you compare quotes, work through these questions with your owners, estimators and production team.

1. What sections do you actually cut? Pull a year of job data. List the largest and heaviest sections, the most common sizes, and how often you process channel, angle or tube. Size the machine for the work you win today and the work you want next.
2. Where is your bottleneck now? If beams wait at the drill line or fitters spend hours grinding plasma edges, a fiber laser beam line removes those steps. If you’re short on floor space, one machine is easier to fit than three.
3. How do you get part data to the floor? Native import from Tekla and other BIM tools eliminates manual programming and the errors that come with it.
4. How does the machine handle real-world steel? Ask how it measures and compensates for camber, sweep and flange tilt. Contour scanning protects hole location accuracy on beams that aren’t perfectly straight.
5. Do you need beveling? If your work includes moment connections or full-penetration welds, an integrated bevel head saves a separate prep operation.
6. What will it cost to run? Compare power draw, assist gas, consumables and expected maintenance intervals, not just purchase price.
7. Who supports it after it ships? Installation, operator training, stocked parts and a responsive service team determine your uptime more than any spec sheet.

The right structural fabrication equipment doesn’t just cut faster. It shortens the path from detailing model to shipped steel, which is how a shop wins more work with the same crew.

If your shop is still moving beams between a saw, a drill line and a coping machine, or grinding plasma edges before every weld, a fiber laser beam line can take those steps out of your process for good. The Accurl H Beam Fiber Laser gives you rigid construction, ±90° bevel cutting, Tekla integration and real-time contour compensation in one machine, supported by a team with more than 30 years in the industry.

See the Accurl H Beam Fiber Laser, or contact Moore Machine Tools at (801) 280-6700 to talk through your sections, volumes, and floor layout with a specialist.