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Glass sorting and WIP buffering
Keep individual glass sheets identified, separated, and ready for the next process from cutting output to IGU staging.
Glass fabrication orders often become difficult to control after cutting. Sheets for different units may share a production area while moving toward edging, washing, tempering, laminating, or IGU assembly. When pieces are placed together without a clear position system, operators must spend more time checking dimensions, matching pairs, and restoring order.
A Hrack, also called a Glass Harp Rack, is designed for this in-process handling point. It provides separated vertical positions for individual sheets, supports short-distance movement inside the plant, and acts as a WIP buffer before the next operation. The rack is configured by project, so the slot layout, support method, dimensions, and load requirements should be confirmed against the project drawing.
Numbered slots keep sheet identification visible
A documented Hrack configuration uses a numbered index beside the lower roller assembly. This gives operators a simple physical reference for placing and locating sheets without relying only on floor marks or memory. The numbering can support sorting by order, sequence, unit pairing, or downstream workstation, depending on the fabricator's workflow.
The slot count is not a universal product value. Source records show project-specific configurations including 40, 50, 60, 75-plus, and 84 slots. The required count depends on the sheet mix, rack footprint, glass dimensions, and the amount of work-in-process that must remain available between operations. A layout review should therefore begin with the maximum and minimum sheet sizes, thickness range, and planned quantity per rack.
Separated contact points help organize sensitive glass
The standard divider concept uses a steel wire core with a PVC or PVB sleeve. The sleeve places a protective polymer surface between the glass and the metal divider, reducing direct hard contact during sorting and staging. EPDM rubber backrest padding is also documented on the sloping support frame, providing a softer surface where sheets lean against the rack.
Hrack bottom support can follow two different design routes. A roller-base version uses nylon roller shafts aligned with the vertical divider positions. A full slotted base uses a continuous slotted support board and is intended for applications that need more continuous support, including short, narrow, or irregular glass. These routes should not be treated as one interchangeable standard. The appropriate option depends on the sheet geometry and handling requirements.
A bolted mobile structure fits changing production layouts
The main frame is documented as Q235A carbon steel square or rectangular tube. Knock-down, bolt-together construction supports shipment in separated components and assembly at the installation site. A close-up of the base structure shows bolted steel joints with locknuts, while some project records also note local welded reinforcement. The exact connection detail remains project-specific.
Mobile versions may use heavy-duty polyurethane or nylon casters, with project records showing 5-inch, 6-inch, 8-inch, and 10-inch options. A foot-operated floor lock or lift-lock mechanism is also part of documented configurations. Because dimensions, caster selection, slot count, and load values vary between projects, the locking hardware, base frame, and intended load should be checked against the approved drawing rather than assumed from another rack.
Confirm these points before specifying a Hrack
- Maximum and minimum sheet dimensions, including short, narrow, and irregular pieces
- Glass thickness range and the required slot spacing for the selected support route
- Planned sheet quantity, slot count, and the order or pairing logic for the numbered positions
- Project-specific frame dimensions, load requirements, casters, floor-lock hardware, and surface finish