How to Specify an Overhead Bridge Crane
October 23, 2017
Getting and specifying the suitable bridge work station cranes on your software requires work, however, getting the proper piece of material handling equipment to your center is going to be worth the attempt. Placing a bridge crane to a new or existing building is an afterthought in the general scope of work. Following is crane salesperson, or a listing of questions to introduce for your architect.
1. What sort of crane do I need? Below is a list of the types, if you aren’t familiar with the sort of cranes. Everyone has their advantages and pitfalls.
A. Workstation crane method. These type of cranes are used for lighter weights under although they are usually utilized in applications of 1 ton and below and two tons. Benefits incorporate lightweight, pre-engineered, and comparatively inexpensive. Disadvantages include limited capabilities.
B. Top jogging single and double girder. These cranes are used in applications. Over the base flange of the bridge column, the trolley hoist runs in one girder program. Benefits include cost versus dual girder and wheel loading thereby reducing construction and/or chip expenses. Disadvantages include less hook height possible, not as durable and the trolley can be in a suspended position versus running along with bridge beams (on heavy software premature beam wear has been noted).
For truly heavy duty designs afterward, a double girder layout ought to be considered. The trolley rides on top of two bridge beams on the rail. This is a superior design for significant applications like aerospace facilities, foundries, and steel service centers to mention a few.
Benefits incorporate choices and durability available such as paths and cabs. Disadvantages include cost and thicker wheel loads.
C. Under working single and double girder design. Cranes are typically thought of lighter duty than best running cranes, underneath running. This is due to all of the conducting surfaces for your crane and crane hoist are about the flange of the wear. Benefits include hook coverage that is better and it can be made to hang on new buildings. Cons include typically cycle.
D. Gantry Cranes. When you’re limited in constructing the structure, Gantry cranes can solve issues. They can be offered in many configurations and will run with the end running on the floor on one runway, or be independent of your building. Some need trail or rail, and some can operate on the ground trackless. Configurations include single girder and double girder.
Benefits include being independent of building a structure in some configurations with disadvantages including moving thighs on your shop floor, and also much less mobile or quickly as a crane on two runways.
2. What’s the duty cycle of the crane? Your crane’s duty cycle is as important as the sort of crane you select. CMAA has service classifications as follows:
Class A-standby or infrequent Support
Class B-Light service
Class C-Moderate service
Class D-Heavy service
Class E-Severe service
Class F-Continuous severe Support
Refer to CMAA Definitions of crane support class and load cycles as shown in Table 2.8-1 of CMAA Specification Number70, Revised 1994 and Table 2.6-1 CMAA Specification #74, Revised 1994.
Several factors go into deciding the proper crane class including the weight of the load, a number of payloads at average load, and how many lifts per hour, per change, daily, travel distances of this hoist, trolley, and bridge, the rate required for each movement.
3. Which sort of management and energy will my application require? Cranes may be provided as manual, electric or air powered. Cranes may be a blend of manual and manual or electric and air. Depending what is available in your plant and on what you’re lifting will help determine what you require.
Typically air is used in volatile environments or acute duty cycle software at lighter capacities. Electric control is the most typical and may be given with two-speed controls or single or exact frequency controllers with control ratios up to 1000 to 1.
4. How can I control my own crane? Cranes are controlled by a cap pushbutton station or wireless control. Depending on how you are going to use the crane will ascertain what type of control is best for your application.
5. Can there be anything unusual in my program such as a distinctive environment? When you have a unique application such as explosive surroundings, molten metal, higher heat, or any other special consideration in picking out your bridge crane, particular care should happen.
Be sure and also have a professional crane professional aid in specifying the appropriate bridge crane per applicable requirements.
These items will allow you to get started with picking the right piece of equipment for the facility. Utilizing the guideline as well as consulting with industry professionals will lead you to buy the bridge crane. ELS is a lifting system company in Canada. Contact them for more info.