'A' Frame crane design help

In summary, the conversation is about constructing a stationary 'A' frame crane with specific dimensions and requirements. The individual is seeking input on choosing the correct materials for the crane, including the use of two W12 x 45 steel I-beams and four evenly spaced K braces. The lifting capacity should be at least 50 Kips and support cables should also be considered.
  • #1
tradewind
2
0
Gentlemen,

I am needing help choosing the correct materials to construct a stationary 'A' frame crane with a fixed radius of 15ft, back stayed with 2-1" cables approx. 70ft behind main non-rotational boom legs attached to embedded concrete weights, height of boom is 60 ft with pendants connected at the tip, supporting a 4-15" head sheave arrangement,a 'K' brace would be used approx. 15 ft down from tip, head width pendant to pendant of 34" and boom feet spread 10 ft on center. Approx. lifting capacity of at least 50 Kips or more.

Thanks for any input
 
Engineering news on Phys.org
  • #2
tradewind: For each of the two boom poles in your A-frame, it currently appears an imperial W12 x 45 steel I-beam would work, and would give a lifting capacity of 27 220 kg. But you must use four K braces, evenly spaced, not just one.

I did not check your support cable diameter. Maybe some other time.
 

1. What is an 'A' Frame crane?

An 'A' Frame crane is a type of crane that is commonly used in construction and industrial settings. It consists of a triangular structure with two legs and a horizontal beam connecting the two legs at the top, resembling the letter 'A'.

2. What are the advantages of using an 'A' Frame crane?

One of the main advantages of using an 'A' Frame crane is its stability. The triangular shape of the structure allows for even weight distribution and prevents the crane from tipping over. It also has a relatively small footprint, making it ideal for use in tight spaces. Additionally, 'A' Frame cranes are versatile and can be used for a variety of lifting and hoisting tasks.

3. How is the lifting capacity of an 'A' Frame crane determined?

The lifting capacity of an 'A' Frame crane is determined by several factors, including the strength and stability of the materials used, the angle of the legs, and the size and weight of the load being lifted. It is important to consult with a structural engineer to ensure that the crane is designed to safely lift the intended loads.

4. Can the height of an 'A' Frame crane be adjusted?

Yes, the height of an 'A' Frame crane can be adjusted by extending or telescoping the legs. This allows for greater flexibility in terms of the size and weight of the loads that can be lifted. However, it is important to follow proper safety protocols when adjusting the height of the crane to prevent accidents.

5. Are there any safety considerations when using an 'A' Frame crane?

Yes, there are several safety considerations that should be taken into account when using an 'A' Frame crane. These include ensuring that the crane is properly assembled and secured, following weight limits and load distribution guidelines, and conducting regular maintenance and inspections. It is also important to provide proper training for operators and follow all safety protocols to prevent accidents and injuries.

Similar threads

Brainstorming - how to best hold camera 18 feet above the ground.
    • Mechanical Engineering
Replies
6
Views
3K
Design Large Sign for Wind Loads
    • Mechanical Engineering
Replies
12
Views
9K
Why is the U-2 nicknamed the Dragon Lady?
    • General Discussion
Replies
4
Views
7K

Hot Threads

Recent Insights

Back
Top