Top running overhead cranes run on fixed tracks mounted on the top of each track beam, which allows the end truck to carry the girder and hoist along the top. These top running cranes can be set up as single or double beams depending on the application requirements. Top running single girder cranes have the trolley and hoist mounted on the bottom, while double beam cranes use a top running trolley and hoist, allowing for additional lift height and higher hook height.
Some of the benefits of top running cranes include:
No restrictions on capacity. This allows it to handle both small and large loads.
Increased lift height. Mounting on the top of each track beam allows for increased lift height, which is beneficial in buildings with limited headroom.
Built for higher capacity. Top running single girder cranes are larger than bottom running cranes, allowing them to handle higher capacity.
Easy to install. Since the bridge crane is supported by the track beams, the hanging load factor is eliminated, making installation simple.
Less maintenance. Top running overhead cranes do not require much maintenance over time, except for regular checks that the tracks are aligned correctly and if there are any issues.
For buildings with limited headroom, top running cranes provide greater lifting height than an underhung crane. That’s because a top running crane rides on rails on top of the beam. If head room and lifting height are the biggest factors in your decision, a top running crane provides the greatest headroom optimization.
Compared to underhung cranes, top running single girder cranes are typically larger and a better choice for higher capacity lifting applications, such as those involving 20 tons or more. Other advantages of top running overhead crane systems include easier installation and wide availability of parts. Additionally, the wheels of a top running crane are easier to service, as the crane does not have to be suspended from above.
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