The lifting gear is suspended from the horizontal cross member and can move along it on rails. The tracks allow for it to be operational on poor ground conditions.Īlso known as portal cranes, gantry cranes typically consist of two A frames connected by a lattice cross member which straddles the work area. The flexibility of this crane is its main advantage, as it can be adapted to act as a dragline with the addition of a winch drum at the front. Average speed: Usually does not exceed 2 km/h.
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The choice of crane for a particular site will depend a number of different factors, including: Cranes can range from a simple rope pulley to a tower crane fixed to the top of a skyscraper. 5 Related articles on Designing Buildings WikiĪ wide range of different types of crane can be used on construction projects as a means for lifting and moving materials and other building elements from place to place.4.3 Travelling or rail-mounted tower crane.