LEGO® Technic Beams & Liftarms

Build strong, lightweight structures with LEGO® Technic beams and liftarms. These studless structural elements are designed for chassis, bracing, mechanical frames and large custom builds where strength, rigidity and precise pin-hole alignment matter.

Unlike Technic bricks, which combine studs with pin and axle holes, Technic beams and liftarms use a studless design for lightweight structural construction. For the wider range of mechanical and structural components, explore our LEGO® Technic parts collection.

LEGO® Technic Beams, Liftarms & Frames

Technic beams and liftarms form the structural skeleton of many advanced LEGO® builds. They are commonly used to create rigid vehicle chassis, reinforced frames, trusses and supports while keeping the overall build lighter than a solid brick structure.

• Straight Beams & Liftarms: Core structural elements for long spans, chassis rails and reinforced assemblies.
• Angled & L-Shaped Liftarms: Useful for corners, bracing and geometric framework where straight beams alone are not enough.
• Technic Frames: Pre-formed structural elements that provide rigid rectangular mounting areas for gears, axles and mechanical systems.

Why Use Technic Beams & Liftarms?

• Strong Structural Support: Create rigid frames and reinforced sections that resist bending and twisting in larger builds.
• Studless Construction: Build lightweight Technic frameworks without relying on traditional studded brick walls.
• Precise Pin-Hole Alignment: Position connectors, axles and mechanical parts accurately throughout a build.
• Flexible Frame Design: Combine straight, angled and shaped liftarms to create complex structural layouts.

Build Technic Chassis, Frames & Supports

LEGO® Technic beams are widely used in vehicle chassis, cranes, robots, machinery and custom MOCs. Their repeated pin-hole spacing makes it easier to create symmetrical structures, reinforced sections and accurate mounting points for moving components.

For vehicle-focused projects, combine beams and liftarms with parts from our LEGO® car parts collection. For hybrid builds that mix studded and studless construction, use Technic bricks with pin holes.

Connect Beams with Pins, Axles & Gears

Technic beams and liftarms are designed to work with the wider Technic system. Use Technic pins and connectors to join beams into rigid or moving assemblies, and combine them with LEGO® axles for rotating mechanisms and drivetrains.

When building gearboxes or other functional systems, beams can also be used to keep Technic gears correctly aligned and supported within the frame.

Find the Right Technic Beam or Liftarm

Different Technic builds require different beam lengths, angles and frame shapes. Common options include:

• Short Liftarms: Useful for compact mechanisms, bracing and small connection points.
• Long Technic Beams: Ideal for chassis rails, large frames and reinforced structures.
• Angled Liftarms: Useful for creating corners, triangles and non-linear frame layouts.
• Technic Frames: Provide stable rectangular sections for mounting gears, axles and other mechanical elements.

Popular examples include long straight liftarms such as the 1x15 Technic beam, angled liftarms and rectangular Technic frames used throughout vehicle, machinery and engineering-focused builds.

Shop LEGO® Technic Beams & Liftarms

Browse our range of individual LEGO® Technic beams, liftarms and frames for structural repairs, custom MOCs, vehicle chassis and mechanical projects. For additional Technic components including bricks, pins, connectors, gears and articulation parts, visit the main LEGO® Technic parts collection.