Box Type Ladder Clamps: Secure and Durable Solutions for Scaffolding Systems
Box-Type Ladder Clamps provide a safe, sturdy connection between ladders or stair units and scaffold frames, ensuring reliable vertical access on construction and maintenance sites. At Avanza Steel our clamps are precision drop-forged from high-grade mild steel, finished with industrial hot-dip galvanization, and load-tested to 15 kN. The ergonomic box-type design wraps completely around ladder stringers, delivering 360° support and vibration-free performance throughout hundreds of reuse cycles.
What Are Box-Type Ladder Clamps
A box-type ladder clamp is a four-sided coupler engineered to encase the side stringers of scaffold ladders or stair frames. Unlike standard single-jaw clamps, this design distributes load evenly around the ladder profile, preventing twist, slippage, and localized wear.
Key Advantages:
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Complete Enclosure: Four-sided grip secures ladders without deformation of the stringers.
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High Load Rating: Each clamp is tested to 15 kN, accommodating live loads and dynamic forces.
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Rapid, Tool-Free Fit: Drop-forged body with captive bolts hand-tightens in under 20 seconds.
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Durable Finish: Hot-dip galvanization (≥ 85 µm) resists corrosion in harsh environments.
Attribute | Specification |
|---|---|
Finish | Hot-dip galvanized (ASTM A153; Zn ≥ 85 µm) |
Material | Drop-forged MS per IS 2062 Grade A |
Load Rating | 15 kN per clamp (BS EN 74 tested) |
Stringer Capacity | 40 mm – 60 mm ladder stringers |
Weight (each) | 1.5 kg |
Bolt/Nut | M12 captive nut and bolt, Grade 8.8 |
Compliance | IS 2750, BS EN 74, ISO 9001 |
Technical Specifications
Components & Variants
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Standard Box-Type Ladder Clamp
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Encases stringers up to 50 mm; ideal for most scaffold ladder profiles.
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Wide-Body Variant
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Fits up to 60 mm stringers; reinforced gussets on corners for extra rigidity.
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Swivel-Base Box Clamp
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Mounted on a swivel plate for angled ladder connections on complex access systems.
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Integrated Spigot Option
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Incorporates a spigot pin in the clamp body, allowing direct connection to tube-and-pin scaffold standards.
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Applications & Use Cases
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Scaffold Ladder Integration
Securely attach prefabricated ladder sections to H-frames or Cuplock standards, ensuring vibration-free climbs.
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Staircase Stringer Fixing
Clamp MS stair stringers to scaffolding towers for rapid assembly of safe stair flights.
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Temporary Access Platforms
Integrate ladder modules into mobile towers, facilitating multi-level access in warehouses and factories.
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Industrial Maintenance Rigs
Use wide-body clamps to mount structural access ladders on piping racks and machinery skid frames.
Installation & Best Practices
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Stringer Preparation
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Ensure ladder stringers are free of debris and paint drips for full metal-to-metal contact.
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Clamp Positioning
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Open box clamp, position around the stringer, and align captive bolt holes.
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Hand-Tightening
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Engage M12 captive bolts by hand until flush; give a final quarter-turn per wing to seat the clamp.
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Torque Verification
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Optionally use a 12 mm torque driver set to 20 Nm to ensure uniform preload across all clamps.
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Periodic Check
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After initial use, verify no loosening has occurred; retighten bolts before sustained operations.
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Maintenance & Lifecycle
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After-Use Cleaning: Rinse off concrete splatter and grease; dry thoroughly to prevent flash rust.
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Inspection Cycle: Every 50 climbs or 30 days, inspect for cracks in the drop-forged body and check zinc coating integrity.
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Re-galvanization: For high-corrosion sites, a light cold-galv spray touch-up maintains protection between full re-dip cycles.
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End-of-Life Recycling: All MS components are recyclable, aligning with Avanza Steel’s sustainability commitment.
Ensure secure, vibration-free ladder access with Avanza Steel’s precision Box-Type Ladder Clamps:
👉 Download the full Product Brochure for detailed part codes, dimensional drawings, and load charts.
👉 Contact our team at avanzasteel@gmail.com or +91 33 4000 7575 to request a site-specific quote, arrange a factory tour, or schedule an on-site technical consultation.