Strand jacks are heavy-duty machinery used to lift and lower heavy loads, with a higher lifting capacity than cranes. They consist of a steel tube filled with hydraulic fluid and a cable running through it. Multiple units can be used together, controlled from a central switchboard. Strand jacks save time and money on large construction projects, operate in small or difficult areas, and are easy to transport. However, their newness compared to traditional cranes may deter some contractors.
A strand jack is heavy-duty machinery used to lift and lower heavy loads. It performs a similar function to a standard crane, but is much smaller. Despite its small size and footprint, the strand jack is capable of lifting a much heavier load than the average crane. With their high lifting capacity and strength, strand jacks are often used to pull or lift exceptionally heavy loads, such as prefabricated buildings or large sections of bridges. A large jack was even used to erect the famous Millennium Wheel, or London Eye, on the banks of the River Thames.
Each jack consists of a steel tube filled with hydraulic fluid. A steel cable, or series of cables, runs through the center of the tube. The unit’s operating system monitors a series of metal pins or clamps within the pipe. Using this operating system, users can instruct the metal pins to snap onto the cable at different points inside the tube. These feet can step up or down the cord to raise or lower the object, or simply lock the cords to hold the object in a predetermined position.
While a basic lifting project may require the use of a single strand jack, a larger project may require the combined lifting power of dozens or even hundreds of units. When used together in this way, strand jacks must be controlled from a central switchboard. Special computer software helps ensure that the jacks work as one to raise or lower the object safely.
One of the main advantages of using a strand jack is its very high lifting capacity. These fixtures allow contractors to lift or mount objects in one section, which can save time and money on large construction projects. The jack also raises the bar in terms of building height or size, making things possible that wouldn’t be possible with a standard crane.
Another advantage of the strand jack is its small size and bulk. For example, a standard unit may weigh just one-tenth of a crane and take up one-tenth the space. This allows the strand jack to operate in very small or difficult to access areas where a crane may not be able to reach. It also means that the jack is easy to transport and reduces the time and manpower required to set up and use the device. A potential downside to these devices is their relative newness compared to traditional cranes, which may deter some contractors.
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