Overhead Cranes - Top running, Under Running, Double girder, Single girder

300/165 Ton Top Running Double Girder Crane

We do not "dabble" in overhead cranes, as has been the new industry trend of sling houses and fab shops building "kit cranes". Demanding applications requiring the undivided attention of an experienced engineering and design group is our strength.

Below are examples of different overhead traveling bridge crane configurations. To determine which type is right for your application, contact one of our experienced staff members.

Top Running Double Girder Crane
Shown here is a CMAA Class "D" 40 ton capacity, 71'-4" span box girder bridge. The two outside hoists have a 20 ton capacity and the hoist in the center has a capacity of 40 ton. Trolleys are synchronized using Variable Frequency Drives. Hoists are synchronized using Closed Loop Flux Vector drives. Primary means of control is Radio, with backup traveling push button station.

Under Running Double Girder Crane
This 10 ton capacity bridge features a top running dual girder ultra-low profile trolley hoist. Riding under one of the bridge girders is a 2 ton capacity "javelin". The javelin hoist is used to project product under the runway beam and into the adjacent bay. Controls include collision avoidance systems to limit bridge travel when the javelin is extended between building columns.

Twin Hook "Reel" Crane
This type of crane is custom designed and manufactured by Zinter Handling Inc. for the paper industry. Handling reels of paper in a producing mill can be a very demanding application, set in unfriendly and some times harsh surroundings. The hoists are reeved directly into the lifting device to conserve valuable headroom.

Single Girder Cranes
Shorter spans may allow for the use of a single girder bridge crane. A monorail type hoist is used in conjunction with this bridge configuration. Single girder bridge cranes (as well as under running bridges) are usually limited to CMAA Class "C" service.