A2B

A2B

NEW AND IMPROVED ANTI-TWO BLOCK FOR CRANES

Over the years, the offshore and marine industry has witnessed multiple crane incidents and dropped loads due to two-block collisions. To address this problem, Keppel LeTourneau researched to come up with a simple yet innovative solution to reduce the risk of dropped loads.

The result is an Anti-Two Block system (A2B) that can be modified to fit most cranes in the market today.

Weighing under 50 lbs and with a compact body, the newly designed A2B can be installed on all LeTourneau cranes and is also customizable to other brands upon request. It boasts an expected life span of over 10 years and is made of forged stainless steel and high impact polymer to resist corrosion.

Our A2B utilizes a dual chain suspension system which ensures that it is highly resistant to spinning, thereby preventing it from being dragged up by the wire rope. On top of this, the wide stabilizing arms cater for high winds, and pitch & roll motions.

The newly designed A2B with field adjustable chains that allows for flexible stopping distances for a variety of applications.
The newly designed A2B with field adjustable chains allows for flexible stopping distances for a variety of applications.

A distinguishing feature of our A2B is its versatile and reliable sensors. The redundant NAMUR proximity sensors are integrated in an easily replaceable cap and the activation of limit sensors is not dependent on chain length or weight unlike other A2B designs.

The innovative design also allows for the A2B to be installed without removing the block and disconnecting the wire rope. The A2B interlocks onto the wire rope with multiple fasteners and will not come off the wire rope if the chains break or if several fasteners are removed.

One of the key advantages of the newly upgraded A2B is that it can be visually inspected without disassembly. Unlike existing systems in the market, our A2B has no springs, seals, lubrication, precision wear points or mechanical switches, making it practically maintenance free. It is resistant to wire rope lubricant, sand, water, ice and other contaminants that normally disable other A2B designs.

A distinguishing feature of our A2B are the versatile and reliable sensors that are not dependent on chain length or weight unlike other A2B designs.
A distinguishing feature of our A2B are the versatile and reliable sensors that are not dependent on chain length or weight unlike other A2B designs.

For more information on the A2B, please download our brochure or consult our team to discuss how it will enhance your operating experience:

Rickey Heggar, Account Manager, USA
rickey.heggar@keppelletourneau.com

Alex Sibie, Sales Manager, Dubai
sibie.alex@keppelletourneau.com

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