Load Calc Analysis for a Ladder Frame - Get Help Now

In summary, the conversation discusses the load calculations for a ladder frame chassis and how the weight of the vehicle at the center of gravity is distributed along the frame and affects the cross members. The individual also asks for alternative methods to analyze this without using software. Additionally, the concept of torque or twist in the cross members is mentioned and a suggestion is given to assume the vehicle weight is distributed proportionally to the distance of the center of gravity from a member. However, more information is needed to accurately calculate this, such as the vehicle dimensions, material, and wheel locations.
  • #1
the4thworld
7
0
Hey i would really appreciate it if someone could help me with the load calculations in a chassis.
The frame is basically a ladder frame, 2 C section side rails and cross members.
Would like to know how the weight of the vehicle acting at the Cg gets distributed along the frame. And how does this weight effect the cross members.
And apart from using an analysis software, how would i go about doing this.

Thanks

This is basically what the frame looks like
http://tinypic.com/r/20glmc1/5"
 
Last edited by a moderator:
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  • #2
Almost 80 views and no replies??
Anyway
Considering the vehicle travels over uneven roads, thus causing one side rail to be lifted while the other remains the same, this would cause a torque or twist in the cross member.Any idea how i could go about calculating this??
 
  • #3
the4thworld: You could assume the vehicle weight (multiplied by a dynamic amplification factor, daf) is distributed proportional to the distance of the CG from a member. Then you can draw a free-body diagram to analyze a particular member. However, your given question does not define where the vehicle weight would be applied to your four (or two) members, nor does it give dimensions, cross-sectional dimensions, material, wheel locations, nor daf.
 

1. What is load calc analysis?

Load calc analysis is a method used to calculate the maximum amount of weight or load that a ladder frame can safely support. This analysis takes into account the materials and design of the ladder frame, as well as the expected use and weight distribution.

2. Why is load calc analysis important for ladder frames?

Load calc analysis is important for ladder frames because it ensures the safety and stability of the ladder. Knowing the maximum load capacity of a ladder frame allows for proper usage and prevents accidents or damage to the ladder.

3. How is load calc analysis performed for a ladder frame?

Load calc analysis for a ladder frame involves calculating the weight of the ladder itself, the weight of the person or objects on the ladder, and the weight distribution. This information is then compared to the maximum load capacity of the ladder frame to determine if it is safe to use.

4. Can I perform load calc analysis on my own ladder frame?

It is recommended to have load calc analysis performed by a trained professional. They have the knowledge and tools to accurately calculate the load capacity and ensure the safety of the ladder frame. However, there are online resources and calculators available for basic load calc analysis.

5. What should I do if my ladder frame fails load calc analysis?

If your ladder frame does not pass load calc analysis, it is not safe to use. It is important to invest in a new ladder frame with a higher load capacity or to distribute the load more evenly. Using an unsafe ladder can result in accidents and injuries.

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