A construction site often requires various heavy material, machinery, and equipment to be moved from one place to another. More often than not, there isn’t enough space for a truck to frequently navigate through the site to transport these materials. It then makes sense to use cranes and move items at levels often higher than the proposed building. And then you have some cranes that are smaller for lighter loads or for home use. Here are some of the most significant types of cranes: Gantry Girders Goliath Crane Portable Crane Semi Gantry Crane Gantry Girders In factories, sometimes you need to have cranes that are mounted on bridges and steadily move along a path, carrying loads from one point to another. Bridges are built across the factory yards and stand with the support of gantry girders . Wheels and rails allow the bridge to move along the girder, and can often support more than one bridge at a time. Gantry girders are usually made of rolled steel sections, forming be...