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Hrack glass harp rack | Glass protection for plant-floor movement
Worried that frequent pushing will send a glass edge into a steel member? Hrack uses a rear EPDM cushioning strip and a top nylon bar as protection components, so the glass meets a softer contact surface instead of bare structural steel during controlled loading, unloading, and short-distance transfer.
In a busy glass plant, the risk is not limited to storage. Operators push work-in-process between cutting, edging, washing, tempering, laminating, and IGU assembly. A rack that only provides steel capacity still leaves a critical question: what happens when a sheet shifts during handling and reaches the backrest or upper frame?
Hrack is a mobile glass sorting and WIP buffer rack, not a universal warehouse A-frame. Its protection scheme separates three jobs: the bottom support positions the sheet, the dividers keep neighboring sheets apart, and the soft rear and top contact elements reduce direct glass-to-steel contact. The frame remains the structural part; EPDM and nylon are not load-bearing members.
What stops the glass from hitting the steel frame?
The rear EPDM cushion forms the first soft backrest contact. When a sheet is placed into a slot and leans against the inclined rear structure, the EPDM strip sits between the glass and the steel tube. The top nylon bar closes the upper contact path, helping prevent an exposed hard metal edge from becoming the point of contact as the sheet is guided into or removed from the rack. Together, these are protective interfaces—not substitutes for correct loading or a rigid frame.
How are glass edges and surfaces separated during handling?
Each sheet is guided into its own slot rather than pushed against a neighboring sheet. Depending on the project, the lower support can use nylon roller shafts or a full slotted base; these are different configuration routes and must be selected against the glass size, shape, and process. Steel-core divider wires are covered with PVC or PVB sleeves to reduce direct metal contact and surface friction. Slot spacing is project-specific, with documented examples including 8–10mm, 12mm, 14mm, 14.3mm, and 25mm. The correct width should be confirmed for the actual glass and handling method—not assumed from another rack.
Why the floor lock still matters when the rack has soft protection
EPDM, nylon, and sleeved dividers reduce damage risk at contact points, but they do not make an unlocked mobile rack safe to load or unload. Before placing, removing, or sorting glass, the operator must first engage the foot-operated floor lock. The lift-lock mechanism is intended to stabilize the rack by taking the load off the casters; it is not simply a wheel brake. Release the lock only when the rack is ready for controlled movement across the plant floor.
Operator check before selecting an Hrack configuration
- Confirm whether the job needs a roller base or a full slotted base for short, narrow, or irregular glass.
- Set slot spacing for the actual glass thickness, coating, separators, and sorting mix; do not combine values from different projects.
- Specify the rear EPDM cushion and top nylon bar as protection components, while keeping structural load on the steel frame and support system.
- Define the movement route, caster arrangement, and foot-lock procedure so the rack is locked before every loading and unloading operation.