Stop "digging out" buried glass lites from A-frames. In a high-speed fabrication plant, the bottleneck isn't usually the tempering furnace—it's the logistics between the cutter and the washer. Our Mobile Glass Harp Carts are engineered to handle the chaos of custom orders, pairing IGUs, and protecting delicate Low-E coatings during in-plant transfer.
Talk With An ExpertIn the architectural and wholesale glass industry, static storage is easy. The real challenge is Work-in-Progress (WIP). When your CNC cutting table churns out mixed sizes for different orders, placing them on a standard L-buck or A-frame creates a logistical nightmare known as "clam-shelling"—where you have to move five pieces of glass just to access the one you need for the tempering line.
The glass harp rack changes this dynamic. By utilizing a "slot-based" system rather than a "stack-based" system, every single lite is immediately accessible. This is critical for IGU (Insulated Glass Unit) fabrication, where glass needs to be sequenced and paired (inner and outer lites) before hitting the washing and assembly line.
Figure 1: Numbered slots (1-40) and nylon rollers allow for precise sequencing of IGU components.
Modern architectural glass relies heavily on soft-coat Low-E performance. The slightest metal-to-glass contact during transport can cause scratches that result in costly rejects at the quality control station. Standard steel racks require operators to manually separate glass with paper or cork, which slows down production.
Our harp carts eliminate this risk through engineering, not makeshift separators. The vertical dividers are sheathed in heavy-duty PVC casing. This provides a non-abrasive, forgiving surface that cradles the glass. Furthermore, the base is equipped with harp racks for sorting glass units utilizing high-density nylon rollers. These rollers allow heavy laminated sheets or thick float glass to glide into position without the friction that causes bottom-edge chips or "shark teeth."
Figure 2: PVC-coated steel dividers prevent metal-to-glass contact, essential for Low-E and coated glass protection.
A rack that stays still is storage; a rack that moves is a tool. Moving glass from the seaming machine to the furnace requires stability. A generic cart on a dirty factory floor—often littered with glass chips and grit—will vibrate, potentially causing edge trauma to the glass.
This harp rack glass trolley is mounted on heavy-duty polyurethane casters designed to roll over floor imperfections. Crucially, we integrate a foot-actuated lifting mechanism (Floor Lock). When the cart reaches the off-loading station (e.g., the furnace entry conveyor), the operator steps on the lock, raising the wheels slightly or firmly anchoring the cart. This prevents the "rolling away" accident risk when operators are exerting force to slide heavy lites out of the rack.
Figure 3: The integrated floor lock ensures stability during the loading and unloading of heavy glass sheets.
Space in a container is money. Traditional fully welded harp racks are notorious "air shippers," costing a fortune in ocean freight. We have engineered a Knock-Down (Bolt-Together) design without compromising structural rigidity. The base, uprights, and grid system bolt together using high-strength fasteners, allowing us to flat-pack the units. This means you can fit significantly more units per container, lowering your landed cost per rack.
Figure 4: The exploded view shows the modular, bolt-together design that reduces shipping costs while maintaining Q235A steel strength.
| Feature | Standard A-Frame | Mobile Harp Cart |
|---|---|---|
| Primary Function | Bulk Storage / Transport of Packs | Sorting & WIP Flow |
| Accessibility | Sequential (must move outer glass) | Random Access (pick any slot) |
| Glass Contact | Glass-on-Glass (requires paper) | Isolated (PVC Dividers) |
| Best For | Raw Sheet Storage / Truck Shipping | IGU Pairing / Tempering Prep |
1. What is the maximum glass thickness the harp rack can handle?
Standard full base harp racks are designed to accommodate glass up to 1/2 inch (12mm) thick. However, we can customize the slot width for specialized thick glass or laminated ballistic glass requirements.
2. Will the nylon rollers mark the glass edge?
No. We use industrial-grade high-density nylon. It is hard enough to support the weight of heavy lites but softer than glass, preventing chipping or "shelling" on the bottom edge, which is a common issue with steel base slots.
3. Can this cart be used for "Jumbo" size glass?
The standard Mobile Harp Cart is optimized for standard cut sizes (e.g., up to 84" x 96"). For Jumbo sizes (130" x 204"), we recommend our heavy-duty static harp storage systems, as mobile carts for Jumbo glass pose significant safety tipping hazards.
4. How does the numbering system help with IGU production?
The base is labeled with numbers (e.g., 1-40). This allows the cutting table operator to place the "inner" lite in slot 1 and the "outer" lite in slot 2. When the cart arrives at the IGU assembly line, the components are already perfectly sequenced, eliminating time wasted searching for matching pieces.
5. Is the rack delivered fully assembled?
To save you shipping costs, the racks are shipped in a flat-pack (Knock-Down) format. They are designed for easy on-site assembly with standard tools. The main components bolt together, ensuring a rigid structure once assembled.
