Overhead Bridge Cranes can be divided into two groups:
Top Running Bridge Cranes, and
Under Running Bridge Cranes (sometimes called under hung).
The following will take you through a brief list of topics that
should be considered. Please take a brief look and then give us a
call, and we can help lead you through the maze to the best cost
answer for your material handling needs.
A Bridge Crane system consists of three major components.
.the Bridge Crane, which traverses across the runway 2.the hoist & trolley, which traverses across the bridge and lifts
up and down 3.the runway, which is tied to the building structure.
Top Running Bridge Crane with Underhung Hoist
Underhung Bridge Crane with Underhung Hoist
Top Running Bridge Crane with Top Running Trolley Hoist
Top Running vs. Under Running is primarily determined by two
factors:
1.Capacity - Although under running can be up to 25 ton capacity,
the practical limit is more like 15 tons and the economic sweet
spot is 1 to 7.5 ton range. 2.Support Structure - Under running can be suspended directly from
the overhead steel (for lighter cranes). Top running cranes will
require a bracket off the building support steel (up to 10 tons
capacity) or independent columns for heavier capacities.
The top running configuration is best used in cases where the end
user has issues with headroom. The most space efficient
configuration is the double girder, top running crane system. When
headroom is not an issue a top or under running configuration can
be used with either the double or single girder bridge crane.
The above figure shows the three primary methods of supporting a
top running crane.
The above figure shows a typical support column point.
The above figure shows a typical runway cross section without the
crane rail or fasteners. Intermittent welds should not be used in
runways subject to fatigue. The picture shows a channel cap on a
wide flange section, this is a typical form of a continuous girder.
Henan Weihua Heavy Machinery Co,. Ltd.is the core company of weihua group. Weihua is the leading cranes supplier in China, specializing in crane and hoist researching, developing and producing lifting machinery, port machinery, construction-purpose tower crane, reducer, etc. Weihua now is the largest production and sales volume and the most influential brand in China crane industry. The production and sales volume of leading product ranks first. with more than 6000 employees within the group. Among them, there are more than 1600 staffs with college degree or above. Weihua occupy a total production area of more than 1, 900, 000 square meters, the total asset is about 3.4 billion RMB, Tissue plasminogen activator brand value 7.19 billion RMB.register capital 166 million RMB. overhead and gantry crane increasing number of crane are serving in machinery manufacturing, metallurgy, petrochemical industry, mining, energy and transportation, port logistics, automobile manufacturing, shipbuilding and other fields. Hundreds of cranes have been exported to more than 20 countries like Great Britain, America, Russia, Turkey, Brazil, Vietnam, Thailand, India, Iran, Pakistan, and Oman and so on. In FY2010, our total sales reached a history-high 3.62 billion RMB.Our overhead traveling crane and gantry crane are awarded 'China Top Brand ', 'Weihua' trademark was awarded 'China Famous Brand ' Weihua Group also serves the Heavy Machine Industry Association, Material-Handling Machine Association and Bridge Crane Sub-association of China as Deputy Chief Director. Weihua Group owns the only crane R&D center in Henan Province and 76 patents. In 2007, Weihua Testing and Inspection Center was awarded National Laboratory, Weihua Group was named 'National High-tech Enterprise ', Weihua Group was regarded as national technology center. Weihua will keep on improving the R&D and innovation capacity. Weihua Group is committed to 'Becoming the leader in China lifting equipment companies & international famous brand"and open a new chapter in the history of crane production with its continuous efforts and in pursuit of greater core competitiveness.
