Heavy-Duty Roll-Out Remnant Rack for Sheet Metal

How Much Does a Sheet Remnant Actually Weigh?

Most rack sizing arguments end here, with an estimate that is wrong by a factor of two. Steel weighs 7,850 kg per cubic metre, so weight per square metre scales directly with thickness:

Two conclusions follow. A full 3,000 × 1,500 mm sheet at 30 mm exceeds a 1,000 kg per-layer rating on its own, so thick-plate shops need a heavier drawer build or a rule limiting what goes on a tray. And most “heavy” remnants are lighter than the shop assumes: a 20 mm drop at two-thirds of a full sheet lands near 470 kg, comfortably inside a standard rating. Stainless runs slightly heavier at 7,900 to 8,000 kg per cubic metre; aluminium at 2,700 is about a third of steel.

What Decides Whether a Rack Is Genuinely Heavy-Duty?

Four things, and only one of them is steel thickness.

Frame section. Uprights and cross members carry every loaded tray. A frame that deflects will not keep eight drawers aligned, and a drawer that binds gets pulled harder, which wears the rails faster.

Rail and roller design. Load passes through the rails into the frame. Long spans need deeper rail sections, and roller geometry decides whether load spreads across the rail face or concentrates at one point.

Drawer face stiffness. A tray loaded with plate twists if the front and rear members are too light, and twist is what makes a drawer drag on one side.

Base and feet. Load has to reach the slab through a defined path, not through a floor plate.

Herochu specifies high-strength carbon steel with an anti-rust powder coating, and builds trays to the sheet format rather than adapting them from a lighter model. Both standard units, HC-V2513-8 at 2,500 × 1,000 mm and HC-V3015-8 at 3,000 × 1,500 mm, carry 1,000 kg per level across 8 tiers, with 60 mm clear space as standard.

Why Does Drawer Effort Matter More Than Tonnage?

A rack rated at 1,000 kg per layer is only useful if a person can move that layer. Rolling resistance on a steel roller running on a steel rail sits in the region of one to two percent of the carried load, so a one-tonne drawer needs roughly 10 to 20 kgf of pull. That is manageable one-handed when everything is square and clean, and unpleasant when it is not.

Effort rises when a drawer is loaded off-centre, when grinding dust or spatter reaches the rail path, when the frame is out of level, or when the front edge is overloaded. Mechanical assistance takes the peak out of the pull at breakaway, where static friction has to be overcome, and keeps the return stroke controlled instead of letting a heavy tray run and slam.

How Should Load Be Distributed Across Tiers?

Heavy at the bottom is structural, not a preference. Thick plate drops belong in the lowest drawers, close to the base, and thin gauge or aluminium sits higher.

Two habits protect the rack over years of use: load each tray evenly across its width instead of stacking one end, and close every drawer before opening the next. A rack with three drawers extended has its centre of gravity outside its base.

What Load Does the Floor See?

A fully loaded 8-tier rack holds up to eight tonnes, and that mass reaches the slab through the feet. The number that matters is not average pressure over the base area but the load at each foot, which can be several tonnes on a small contact patch. Have the slab checked for those point loads before installation, particularly on mezzanines, upper floors and older buildings whose drawings may not reflect later modifications. A level floor is the second requirement: an out-of-level base twists the frame, and a twisted frame turns every drawer into a two-person job.

How Do You Inspect a Heavy Rack Over Time?

A quarterly walk-round catches most problems early: cracks or distortion at rail brackets, a drawer whose front corner lags, dust and spatter in the rail path, coating damage near floor level where moisture collects, and load labels that no longer match what is stored.

Herochu supplies these racks to fabrication and sheet processing plants in Europe, Southeast Asia, the Middle East and North America, with CE marking for industrial safety and ISO 9001 manufacturing behind the build.