I’m working on a project for my home gym. I want to be able to drop a loaded barbell without bothering my downstairs neighbors. My main approach is to use 2 blocks of dense foam on which to drop the barbell (when loaded with weights, barbells have 2 contact points to the ground). Ideally the foam absorbs the full impact of the weights, letting no vibration travel through the the floor.
I’ve learned that dense foam is expensive! A 4” tall block of decent foam costs $106.
To help me determine what material to buy, is there an equation that calculates how much force foam of a given density and thickness can absorb, without any force passing through to the floor?
Some initial values:
- Assume barbell weighs 250 lbs, so 125 lbs dropping on each foam block
- Barbell is dropped from 72 inches above foam.
- Foam comes in densities of 0-8 lbs per cubic ft, escalating in price substantially.
- The contact point between barbell and foam pad is the width of the weight plates, an average of 7 square inches.
I’m looking for a way to find the optimal trade off between foam density and thickness. For example, a dense foam costs more, but requires less volume to absorb impact.
Thanks for any assistance!