| UNSUNG HEROES
Today’s range of vertical, horizontal, and pipe lifting clamps, for example, offer a myriad of features specifically designed for the demands of wind energy applications. A standout feature of CrosbyIP-branded standard and bespoke clamps is a non-marring camsegment.” When handling steel plates with lifting clamps, the clamping camsegment and pivot usually leave an indentation in the material surface - known as marring. Because of the high standards in the wind energy industry, these indentations must be ground away from the surface. This rework costs time and money. By reducing the height of the teeth of the camsegment and pivot, the pitch between the teeth can be decreased and more teeth can be in contact with the material surface, reducing the depth of the indentations.
The last lifting clamp that de Kruijf
worked on from start to finish was the IPTKA universal beam clamp, for hoisting, pulling, and positioning beams. It can be used as a temporary tackle point in side-loading applications. de Kruijf says it boasts side-loading capacity at 100% of the working load limit up to a 90-degree lifting angle. It is easy to close and open with a hinged body with self-locking device and available with a multi-purpose hoisting eye for tightening and hoisting. Whether it be the IPPE, IPGNS, IPTKA,
or another clamp altogether, “The user always drives the innovation,” de Kruijf says. “I used to interact one-on-one with the person who encountered the lifting or material handling problem. These days, channel partners also play an
R Cor de Kruijf with a 100t capacity lifting clamp.
integral role as we look at the end-use application collectively and, if necessary, adapt one of the hundreds of clamps that we have already designed. But the principle is the same.” CrosbyIP manufactures clamps
where there might be a requirement beyond the capabilities of the standard range. A recent example is the 22.5t capacity special universal vertical clamp (model IPU10X3). The clamp, which was designed for a German wind energy manufacturer, features an extra-wide camsegment and three pivots for less surface pressure to further reduce indentations. Another product is the 6t capacity
R Devoted husband, and grandfather.
universal horizontal clamp (model IPHGUX1), which presents many of the same benefits to the end user and is ideal for rolling larger plates. This is a new high-tonnage addition to the universal horizontal lifting clamp range.
The 70t capacity pipe hook (model IPPH) has been designed for 5,700mm to 7,000mm diameter pipe, up to a thickness of 100mm. It features soft steel replaceable inserts and is equipped with 40t capacity G-2140 shackles. With both the universal horizontal clamp and pipe hook, other capacities and jaw-openings are available on request. “The extent to which a product becomes standard or remains a one-off customization, really depends on the application and the market,” de Kruijf says. “In shipbuilding, there are many repeated applications that are the same from one site to the next, so it is very likely that lifting clamps designed for their use will be ubiquitous. In a small- scale steel yard, meanwhile, a problem might be more unique. Then there are those scenarios where a bespoke clamp evolves much later into a more standard model.” ●
www.hoistmagazine.com | March 2022 | 21
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