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Stop gambling with "mystery metal" racks on your tempering line.
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In the glass processing industry, "capacity" isn't just a number on a sticker; it is the threshold between efficiency and catastrophe. A standard, industrial-grade Foldable A-Frame Glass Rack (specifically the Zmgrack series) is engineered to withstand a static load capacity of 1,500kg (approx. 3,300 lbs).
However, simply holding the weight is not enough. The real challenge arises when that weight starts moving—from the vibration of a forklift crossing an uneven warehouse floor to the G-forces experienced on a flatbed truck during emergency braking. Unlike cheaper alternatives that use stitch welding (spot welding), our racks utilize Q235 high-strength carbon steel with full seam welding. This construction ensures that the frame maintains zero-deflection rigidity, preventing the torque from the truck chassis from transferring to your fragile glass edges.
Figure 1: Verified 1.5-ton capacity structure designed for high-density glass packs.
Many plant managers face a common bottleneck: you have a rack rated for 3,000 lbs, but you can't use it because the order is for 6-meter commercial curtain wall units, and your rack has a closed frame design.
The Open-Ended Advantage: Traditional A-frames often feature a central bottom beam or closed side panels that physically restrict the length of the glass or window frames you can load. The Zmgrack solves this by employing a fully open-ended design. While the rack's physical footprint is a compact 2200mm (86 inches) long, it allows long sheet loads (like jumbo IGU units or aluminum window frames) to overhang naturally on both sides without interference.
This means a single Demountable A-Frame Rack can serve as a universal solution for your standard residential glazing orders and your oversized commercial projects, eliminating the need to purchase custom extended racks that clutter your facility.
Figure 2: Open-ended geometry allows for overhang of oversized loads without structural interference.
High weight capacity is useless if the rack itself damages the product. A common complaint from Quality Control managers is "shelling" (edge chipping) or scratches on high-value Low-E coatings. This almost always stems from the degradation of the rubber pads.
The Failure Point of Glue: Most competitors save costs by gluing rubber pads to the steel frame. In a shipping container baking at 130°F (55°C) or a fabrication shop exposed to cutting fluids, this glue fails. The rubber peels off, and your glass grinds directly against bare metal.
The Zmgrack Solution: We refuse to use glue. Our protective profiles are steel-cored rubber strips. They are mechanically anchored directly into the Q235 steel tube using self-tapping screws. This physical connection ensures that even under the immense friction of 3,300 lbs of glass shifting during transport, the rubber will never peel, roll, or detach. This guarantees zero metal-to-glass contact, preserving your coating integrity and reducing rejection rates.
Figure 3: Steel-core rubber strips anchored with self-tapping screws eliminate glue failure risks.
Your Procurement Director likely hates one thing more than anything else: Reverse Logistics Costs. Sending a truck 500 miles to deliver glass is necessary; paying for that same truck to drive 500 miles back carrying empty, bulky iron frames is a waste of cash flow.
Because the Zmgrack is a Collapsible Glass Stillage, it changes the math of freight.
The Workflow:
1. Unload the glass at the job site.
2. Remove the crossbars and pull the safety pins.
3. Fold the A-frames down 90 degrees.
4. Stack them "toes-to-toes" in a nested formation.
The Result: You can stack up to 60 units in a single 40HQ container or return truck. This 5:1 compression ratio means you slash your return shipping bill by 80%. You stop shipping air and start shipping value.
Figure 4: Folded and nested base design maximizes reverse logistics efficiency.
| Feature | Zmgrack Foldable System | Standard Fixed A-Frame | Wooden A-Frame Crate |
|---|---|---|---|
| Static Load Capacity | 1,500 kg (3,300 lbs) | 1,500 kg (3,300 lbs) | Variable / Unreliable (subject to rot/warp) |
| Reverse Logistics | 5:1 Compaction (80% savings) | 0% Compaction (Full freight cost) | Single-use / Disposal fees |
| Coating Protection | Screw-fixed Steel Core Rubber | Glued Rubber (High fail rate) | Foam/Paper (Low protection) |
| Length Compatibility | Unlimited (Open-ended) | Restricted (Closed ends) | Fixed Size |
1. Can this rack handle the dynamic load of a forklift sudden stop?
Yes. The base features customized forklift pockets (Forklift entrance) that guide the tines to the exact center of gravity. This prevents the "pendulum effect" and tipping during sudden braking or cornering in the loading dock.
2. Is the rubber compatible with soft-coat Low-E glass?
Absolutely. We use a specially formulated industrial rubber that provides high friction to prevent sliding but is non-marking to protect sensitive soft coatings and silver layers from oxidation or scratches.
3. How long does it take for one worker to fold the rack?
Approximately 60 to 90 seconds. The design utilizes quick-release pins and a leverage-friendly hinge system, allowing a single operator to collapse the rack without special tools.
4. We have a tempering furnace with a specific off-load height. Is the rack height adjustable?
The standard geometry is fixed for maximum structural integrity (forming a rigid triangle). However, as a manufacturer, we can customize the base height or A-frame angle to perfectly match the takeaway conveyor height of your Glaston or Landglass furnace.
5. Will these rust if stored outside in the bonyard?
For outdoor storage, we recommend our Hot-Dip Galvanized finish option. This creates a metallurgical bond that protects the steel from corrosion for 15-20 years, even in coastal environments, unlike standard powder coating which may chip over time.
