How to Specify an Overhead Bridge Crane

Specifying and getting the appropriate overhead bridge crane for the program demands upfront work but getting the right bit of material handling equipment on your facility is going to be worth the effort. Regularly placing a bridge crane into your new or existing construction is an afterthought in the general range of work. Following is a summary of questions to present to your architect, or even crane sales individual.

1. What sort of crane do I need? If you aren’t familiar with the sort of cranes below is a short list of the types. Everyone has their own advantages and pitfalls.

A. Workstation crane system. This kind of cranes are usually used for lighter weights 2 tons and beneath although they are normally utilized in programs of 1 ton and below. Advantages include lightweight, pre-engineered, and relatively inexpensive. Disadvantages include limited abilities.

B. Top running single and double girder. These cranes are used in more heavy applications. In one girder program, the trolley hoist runs on the bottom flange of the bridge beam. Benefits include reduced price versus double girder and lighter wheel loading thereby reducing building and/or runway costs. Disadvantages include less hook height potential, not as durable and trolley can be in a suspended position versus operating on top of bridge beams (on heavy software premature beam wear was noted).

For really heavy duty designs afterward, a double girder layout ought to be considered. The trolley rides along with two bridge beams over ASCE rail. This really is a superior design for significant applications such as steel service centers, concrete centers, foundries, and aerospace to list a few. Benefits incorporate exceptional durability and more options available such as walkways and cabs. Cons include heavier wheel loads and cost. Hire Engineered Lifting Systems & Equipment Inc. here.

C. Under running single and double girder design. Under conducting, cranes are normally thought of as lighter responsibility than best running cranes. This is due to all the conducting surfaces for your crane and crane hoist are about the floor flange of the beams and early wear may happen with heavy duty cycles. Advantages include better hook coverage and it may be designed to hang from the building construction on new buildings. Cons include typically lighter duty cycle.

d. Gantry Cranes. Gantry cranes can solve many issues when you are limited in building the structure. They can be supplied in many configurations and may run on one runway with an opposite end running on the floor, or be entirely independent of your construction. Some need a special track or ASCE railing, and some can operate on the floor trackless. Configurations consist of the single girder and double girder.

Benefits include being independent of building a structure in certain configurations with disadvantages including moving legs in your shop floor, and much less portable or quickly as a crane on two runways. See:

2. What’s the duty cycle of the crane? The duty cycle of your crane is equally as important as the kind of crane you decide on. CMAA has service classes 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 acute service

Refer to CMAA Definitions of crane support class and load cycles as shown in Table 2.8-1 of CMAA Specification Number 70, Revised 1994 and Table 2.6-1 CMAA Specification #74, Revised 1994.

Several factors go into deciding the proper crane class including the burden of this load, quite a few payloads at average load, just how many lifts per hour per shift, per day, traveling distances of the hoist, trolley and bridge, rate necessary for each movement.

3. Which type of energy and control will my application need? Cranes may be supplied as a guide, air or electric powered. Cranes may also be a mix of manual and manual or electric and atmosphere. Depending on what you are lifting and what is available in your plant will help determine what you require.

Typically air is utilized in explosive environments or extreme duty cycle applications at lighter capacities. The electric controller has become the most frequently occurring and can be provided with simple single or two-speed controllers or exact variable frequency controllers with management ratios around 1000 to 1.

4. How can I control my crane? Cranes are generally controlled by a taxi, pendant push button channel or radio control. Based on how you’re going to utilize the crane will determine which type of control is best for your application.

5. Can there be anything unusual in my program as a distinctive environment? In case you’ve got a particular application such as molten metal, volatile environment, higher heat, or any other special consideration then particular care needs to happen in selecting your bridge studs.

Ensure and have a skilled crane professional aid in establishing the right bridge crane each applicable requirements.

These items will Help You to Get started with choosing the right

A piece of gear for the facility. Utilizing the above guideline in addition to consulting with business professionals will direct you to buy the proper bridge crane.

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