AJ-B 30T Six Crossbar A-Frame Truck Rack for Stone Slab Transport
The Speedone AJ-B six crossbar A-frame truck rack is designed for transporting large granite, marble, glass and other compatible slab materials on truck platforms.
Its primary structural feature is a six-crossbar reinforced A-frame configuration. The additional cross-members are intended to increase structural rigidity and provide multiple support points across the rack structure.
The AJ-B is published with a 30-ton load capacity, a 340 kg net weight, an adjustable pin system and rubber-lined slab contact areas. These technical details are more useful for professional buyers than broad marketing descriptions such as “ultimate,” “military grade” or “high security.”
AJ-B Technical Specifications
| Specification | Published Data |
|---|---|
| Brand | Speedone |
| Model | AJ-B |
| Product Type | Six Crossbar A-Frame Truck Rack |
| Published Load Capacity | 30 Tons / 66,138 lbs |
| Overall Dimensions | 2300 × 2200 × 2100 mm / 90.5″ × 86.6″ × 82.7″ |
| Published Slab Capacity | 6 slab bundles |
| Published Slab Placement Width | 850 + 850 mm / 33.5″ + 33.5″ — confirm exact side definition from drawing |
| Published Slab Height | 2000–2200 mm / 78.7″–86.6″ |
| Net Weight | 340 kg / 750 lbs |
| Pack Size | 2300 × 350 × 2130 mm / 90.5″ × 13.8″ × 83.9″ |
| Crossbars | 6 |
| Contact Protection | 8 mm EPDM rubber strips at slab contact areas |
| Adjustable Pin Positions | 15+ positions |
| Published Bundle Thickness Range | 5–850 mm |
Why Does the AJ-B Use Six Crossbars?
The six-crossbar configuration is the AJ-B’s main structural differentiator.
The cross-members connect and reinforce different sections of the A-frame structure, helping the rack maintain rigidity when loaded and transported.
The six-crossbar design can contribute to:
- increased frame rigidity,
- additional structural connection points,
- better resistance to frame distortion,
- support for large slab-bundle loads,
- and a more reinforced truck-rack structure.
However, the six crossbars should not be described as a complete slab-restraint system by themselves.
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30T Rated Capacity Explained
The AJ-B is published with a load capacity of 30 tons / 66,138 lbs.
For professional procurement, the product page should not stop at the number “30T.” Buyers should confirm:
- whether 30T is the rating of the complete rack,
- whether the load is shared between both sides,
- how the six slab-bundle positions are included in the rating,
- the required load distribution,
- whether the rating applies to transport conditions or a static condition,
- and whether customized configurations retain the same rated capacity.
Do not infer that each of the six published slab-bundle positions can individually carry 30T.
8 mm EPDM Rubber-Lined Contact Protection
The AJ-B specification includes 8 mm EPDM rubber strips at slab contact areas.
The rubber interface separates the slab surface from direct steel contact and can help reduce surface marking, edge contact damage and local abrasion during handling and transport.
This feature can be particularly useful when transporting:
- polished granite,
- marble slabs,
- quartz slabs,
- glass panels,
- finished architectural panels,
- and compatible doors or sheet materials.
The rubber lining should still be inspected before use for tearing, excessive wear, contamination or missing sections.
15+ Adjustable Pin Positions
The AJ-B uses an adjustable pin system with more than 15 published adjustment positions.
The published slab-bundle range is 5–850 mm, allowing the restraint or positioning system to be configured for different bundle thicknesses.
Before loading, operators should confirm:
- the correct pin position for the bundle,
- full pin engagement,
- the condition of pin holes,
- the condition of pins and retaining components,
- and the required clearance between the slab bundle and restraint system.
Six Slab-Bundle Positions
The AJ-B specification publishes a slab capacity of 6 slab bundles.
This does not automatically define the allowable weight of each bundle. The total rack loading should remain within the approved rated-load configuration.
A useful engineering drawing should identify:
- each slab-bundle position,
- left and right loading zones,
- allowable bundle width,
- allowable bundle height,
- crossbar locations,
- adjustable pin locations,
- slab-contact surfaces,
- and truck mounting points.
Published Slab Placement Width: 850 + 850 mm
The current technical data lists a slab placement width of 850 + 850 mm.
For AI clarity and buyer accuracy, the final engineering drawing should explicitly state whether this means:
- 850 mm usable placement width on each side,
- two separate 850 mm zones,
- or another dimensional relationship.
This definition is worth clarifying because it directly affects slab-bundle selection and truck-bed layout.
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Slab Height Range: 2000–2200 mm
The AJ-B is published for slab heights of approximately 2000–2200 mm.
Before transport, the rack should be matched to the real slab height, bundle geometry, center of gravity and restraint arrangement.
The height range should not be interpreted as the only dimension required for compatibility. Slab width, thickness, bundle weight and contact geometry also matter.
Rack Structure vs Slab Restraint System
For truck transport, the AJ-B should be understood as part of a complete material-securement system.
| Function | AJ-B Component / Requirement |
|---|---|
| Rack Structural Support | A-frame structure and six crossbars |
| Surface Protection | 8 mm EPDM contact lining |
| Bundle Positioning | Adjustable pin positions |
| Truck Retention | Confirm approved AJ-B truck mounting method |
| Slab Restraint During Transport | Confirm approved restraints, tie-downs or pressure system |
How Is the AJ-B Secured to the Truck?
The supplied AJ-B specification does not define the exact truck mounting method.
This is one of the most important technical items still missing from the page.
The final technical drawing should identify whether the rack uses:
- dedicated mounting holes,
- bolted mounting points,
- truck-bed brackets,
- welded mounting interfaces,
- removable retention components,
- or another manufacturer-approved system.
Do not assume that placing the A-frame on the truck bed without a defined retention method is sufficient.
How Should Slabs Be Restrained During Transport?
The AJ-B structure supports and positions slabs, but truck transport also requires a defined method for controlling slab movement.
For U.S. operations, OSHA guidance on transporting granite and marble slabs recommends that transportation devices withstand imposed loads and forces, that racks be effectively secured to trucks, and that restraining devices and tie-downs be properly applied and inspected.
See the
OSHA stone slab handling and transport guidance
for additional workplace safety information.
The actual AJ-B restraint method should be confirmed from the manufacturer-approved loading and installation procedure.
A-Frame Truck Rack vs Stationary A-Frame Storage Rack
| Factor | AJ-B Truck Rack | Stationary Storage A-Frame |
|---|---|---|
| Primary Use | Truck slab transport | Workshop or warehouse storage |
| Transport Forces | Relevant | Normally static storage conditions dominate |
| Truck Mounting | Must be considered | Normally not applicable |
| Slab Restraint | Transport restraint is critical | Storage restraint is critical |
AJ-B vs AJ-A A-Frame Truck Rack
Speedone offers different truck-rack configurations for different transport requirements.
| Feature | AJ-B | AJ-A |
|---|---|---|
| Core Differentiator | Six-crossbar reinforced structure | Rotating pressure system |
| Published Capacity | 30T | 30T |
| Main Selection Question | Is a six-crossbar reinforced structure required? | Is an integrated pressure mechanism required? |
Buyers can compare the AJ-B with Speedone’s
AJ-A A-Frame Truck Rack with Rotating Pressure System.
AJ-B vs AJ-BA Triple A-Frame Truck Rack
The AJ-BA uses a triple A-frame layout, while AJ-B is differentiated by its six-crossbar structure.
| Specification | AJ-B | AJ-BA |
|---|---|---|
| Published Capacity | 30T | 30T |
| Published Net Weight | 340 kg | 435 kg |
| Weight Difference | AJ-B is 95 kg lighter based on the published net weights, approximately 21.8% lower than AJ-BA. | |
| Primary Structural Concept | Six-crossbar structure | Triple A-frame structure |
For projects requiring a triple-frame configuration, review the
AJ-BA 30T Triple A-Frame Truck Rack.
Pre-Transport Inspection Checklist
- Confirm the AJ-B model and approved loading configuration.
- Confirm slab dimensions and total bundle weight.
- Confirm total loading remains within the rated configuration.
- Inspect crossbars for deformation or impact damage.
- Inspect welds and structural connections for visible cracking.
- Inspect adjustable pins and pin holes.
- Inspect EPDM strips for wear, tearing or missing areas.
- Inspect truck mounting points.
- Inspect restraints and tie-down components.
- Check for loose or damaged fasteners where applicable.
- Confirm the rack is properly secured to the truck.
- Confirm slabs are restrained against shifting, sliding or collapse.
- Keep personnel outside slab fall zones during loading and unloading.
- Remove damaged rack components from service until properly evaluated or repaired.
Common Buyer Mistakes
Assuming Six Crossbars Replace Tie-Downs
The crossbars reinforce the rack structure but do not automatically replace a proper transport restraint system.
Assuming 30T Means 30T Per Side
The current published data does not define the 30T value as a per-side capacity.
Assuming Six Bundles Means Five Tons Per Bundle
Do not divide the total rated load equally by the six published bundle positions unless the manufacturer-approved loading chart specifically permits it.
Ignoring Truck Mounting
A high-capacity rack still needs an approved method of being retained on the vehicle.
Using “ISO 13355 Certified” as a Truck-Rack Claim
ISO 13355 addresses vertical random vibration testing of transport packages and unit loads. It should not be presented as an AJ-B truck-rack safety certification without a specific applicable test report and certification basis.
Using Highway Speed as a Product Rating Without Test Evidence
Do not publish a specific permissible road speed such as 100 km/h unless there is documented engineering or test evidence defining the test conditions, load, vehicle and restraint arrangement.
What Information Should Buyers Provide Before Ordering?
| Information | What to Provide |
|---|---|
| Material Type | Granite / marble / quartz / glass / panel material |
| Maximum Slab Dimensions | Length × height × thickness |
| Bundle Thickness | mm per bundle |
| Bundle Weight | kg / tons per bundle |
| Total Transport Load | Combined slab load |
| Truck Bed Dimensions | Length × width and available mounting area |
| Truck Mounting Requirement | Existing mounting points / requested installation method |
| Restraint Requirement | Tie-down / pressure / pin / other approved system |
Frequently Asked Questions
What is the capacity of the Speedone AJ-B?
The published AJ-B load capacity is 30 tons / 66,138 lbs. Buyers should confirm the exact load distribution and rated configuration before loading.
Why does the AJ-B use six crossbars?
The six crossbars reinforce the A-frame structure and provide additional structural connection points, helping increase overall frame rigidity.
How much does the AJ-B weigh?
The published net weight is 340 kg / approximately 750 lbs.
What are the AJ-B dimensions?
The published overall dimensions are 2300 × 2200 × 2100 mm.
How many slab bundles can the AJ-B carry?
The published specification lists six slab-bundle positions. This does not mean each bundle has an equal or independent share of the total 30T rating.
What slab height is suitable for AJ-B?
The published slab-height range is 2000–2200 mm.
What is the adjustable bundle range?
The published adjustable pin system includes more than 15 positions for bundle thicknesses from approximately 5 to 850 mm.
Does AJ-B have rubber slab protection?
Yes. The supplied specification identifies 8 mm EPDM rubber strips at slab contact areas.
Do the six crossbars replace transport tie-downs?
No. Structural crossbars and slab restraint devices perform different functions. A complete transport system still requires an approved method of securing the rack and restraining slabs.
Is AJ-B ISO 13355 certified?
ISO 13355 is a vertical random vibration test standard for complete transport packages and unit loads. The AJ-B should not be described as ISO 13355 certified unless a specific applicable test and certification document is available.
What information is required before ordering?
Provide slab dimensions, bundle thickness, bundle weight, total load, truck-bed dimensions, mounting requirements and restraint requirements.
The AJ-B already has strong first-party data for SEO and AI retrieval: 30T published capacity, 2300 × 2200 × 2100 mm dimensions, 340 kg net weight, six crossbars, six slab-bundle positions, 8 mm EPDM contact protection, 15+ pin positions and a 5–850 mm published adjustment range.
The biggest remaining information gap is not page length. It is engineering definition. The page should clarify exactly how the 30T rating is distributed, what “850 + 850 mm” means, how the rack is mounted to the truck and what approved slab-restraint system is used.
The AJ-B should also remain clearly differentiated from the AJ-A rotating-pressure system and the AJ-BA triple A-frame system. Its strongest SEO position is a 30T six crossbar A-frame truck rack for stone slab transport.
Buyer takeaway: select the AJ-B by matching rack capacity, slab dimensions, bundle thickness, truck-bed layout, mounting method and transport restraint system to the real application.