Operations storing mixed long stock—pipes, channels, angles, hollow sections—face a common problem: the material at the back of the rack becomes inaccessible without moving everything in front. Roll-out cantilever systems solve this by converting each storage level into an independently extendable drawer. Herochu’s Roll Out Steel Pipes, Channels, Angle and Hollow Section Storage Rack applies this principle across the full range of structural profiles, delivering 100% extension that puts every item within reach.

The Roll-Out Mechanism

At the heart of each drawer is a gear and pinion drive. The operator turns a hand crank, which rotates a pinion gear engaged with a linear gear rack mounted along the drawer carriage. A reduction ratio—typically 1:1.5—multiplies input torque, meaning the force required at the handle is a fraction of the force needed to move the drawer directly. This mechanical advantage allows a single person to roll out a drawer loaded with 3 to 5 tons of steel.

Industrial-grade pillow block bearings support the crank shaft and maintain gear alignment under side thrust. Without proper shaft support, gear engagement degrades over thousands of cycles, backlash increases, and the crank develops play. Herochu specifies pillow block bearings to keep the drive mechanism stable throughout its service life.

Each drawer carriage rides on heavy-duty solid steel load rollers and lateral guide wheels. The load rollers bear the weight; the guide wheels prevent the drawer from skewing as the load center moves outward into the aisle. This guided roller system ensures smooth operation and protects the rack structure from cumulative wear caused by misaligned drawer movement.

Full Extension for Complete Access

Each drawer extends 100% of its travel, clearing the rack frame entirely. This creates an unobstructed vertical path for overhead crane loading. The crane hook or vacuum lifter descends directly onto the exposed material without risk of snagging on the rack structure. The operator stands at a safe distance, managing the lift without placing hands or feet near the load.

Forklift compatibility follows the same logic. The drawer presents the material in an open area, and the forklift places or removes stock without threading through narrow openings. For facilities without overhead cranes, the crank-out mechanism allows a single operator to extend the drawer, attach a lifting device, and complete the retrieval without assistance.

The motion is smooth and predictable. There is no risk of sudden jerks or runaway drawers. This controlled extension is important when working near high-value equipment like laser cutting machines, where an uncontrolled drawer could cause collision damage.

Accommodating Mixed Profile Types

The roll-out rack handles the full range of long structural materials. Pipes, channels, angles, and hollow sections each present different storage challenges. Round pipe tends to roll. Channels and angles have irregular cross-sections that stack poorly. Hollow sections are lightweight but prone to denting under point loading. The roll-out drawer addresses all three through compartmentalized storage with retention features.

Each drawer can be configured with dividers that create separate storage lanes within the same tier. A single drawer might hold pipe in one lane, angle in another, and channel in a third, with no risk of the materials mixing or interfering with each other. End stops prevent round stock from rolling off during drawer extension.

The clear space per tier is customizable. For bundled materials, a taller clear space accommodates multiple layers. For loose materials requiring individual access, a shorter clear space reduces wasted volume and brings the next tier within easier reach.

Structural Design and Materials

The main frame is constructed from Q235B high-strength steel. This material grade offers a minimum yield strength of 235 MPa and tensile strength between 375 and 500 MPa. It is chosen for its strength-to-weight ratio, weldability, and consistent performance under cyclic loading.

The dual-beam design distributes the drawer load across two parallel beams rather than concentrating it at a single midspan point. Beam deflection under full load drops roughly by half compared to a single-beam arrangement. The gear rack drive maintains its engagement geometry because the mounting surface stays stable. When a drawer extends outward, the load center shifts from inside the frame to a cantilevered position in the aisle. The dual-beam structure manages this transition by keeping the roller track supported at both the front and rear of the frame.

Operational Benefits

The roll-out design transforms retrieval from a time-consuming physical challenge into a controlled mechanical operation. Material preparation time drops significantly because operators no longer need to move front-stacked materials to reach items at the rear. A single person can complete storage and retrieval tasks that would otherwise require two operators or extended crane maneuvering.

For operations storing mixed long stock where variety is the norm rather than the exception, the roll-out rack provides the flexibility that fixed cantilever systems lack. Each drawer operates independently, so retrieving pipe does not require disturbing the angle stored on the tier above or the channel stored behind. This independence reduces handling damage and maintains inventory organization across thousands of retrieval cycles.