Can I Modify My Leaf Springs for Increased Truck Payload Capacity?

[AM1990]

Hi.
If I am going to increase pay load on a truck (within front and rear axle capacity). It is supposed to modify or add leafs in semi-elliptical leaf spring. I want to know what should be the max considerations for doing so?
Just adding some leafs in suspension can fulfill the requirement?
or there would be any design practice/calculation that should be followed?

 

[Ranger Mike]

when you add a leaf you are adding spring rate, just make sure the main leaf can taker your max load..typically we add a spring leaf of length in between the current leafs and only add two or three leafs, more than that make jeaporidize the main leaf

 

[AM1990]

when you add a leaf you are adding spring rate, just make sure the main leaf can taker your max load..typically we add a spring leaf of length in between the current leafs and only add two or three leafs, more than that make jeaporidize the main leaf

I am willing to add 2 leaves in total but I am confused where to put them. As it is obvious that a leaf suspension looks like triangular shape, so I am not sure its triangularity would be affected of not? If so then what would be the result? or shall I need to modify other leaves too to maintain its shape?

 

[Ranger Mike]

can you post a photo or drawing so we can see the " triangle"...

 

[AM1990]

can you post a photo or drawing so we can see the " triangle"...

can you post a photo or drawing so we can see the " triangle"...

Might be these picture could help you also term "triangle" is just used for reference as it has a uniform shape that looks like a "triangle".

 

[Ranger Mike]

i recommend the air lift air bag system. i have used these and quite successfully
https://www.airliftcompany.com/products/air-springs/loadlifter-5000-ultimate

 

[256bits]

I am willing to add 2 leaves in total but I am confused where to put them. As it is obvious that a leaf suspension looks like triangular shape, so I am not sure its triangularity would be affected of not? If so then what would be the result? or shall I need to modify other leaves too to maintain its shape?

This is the reason it is a "triangle"
http://www.engineersedge.com/material_science/leaf-spring-design.htm

Instead of adding leaves, investigate adding an overload leaf, such as seen in the picture at the bottom.
http://www.torklift.com/index.php/blog/tags/listings/overload-leaf-springs?format=feed&type=rss
That way your ride is not affecting until you have the very heavy loads you wish to carry.