DESIGN GUIDE FOR CASE & FOAM SELECTION
For equipment that requires shock protection select the approximate Fragility from the chart below.
Divide the equipment weight, pounds, by the bearing area (surface that will rest on the foam), square inches. This will establish the foam loading, pounds per square inch (psi)
For Loading 0.1 to 0.3 psi use 2.0 lbs./cubic foot Polyurethane
For Loading 0.3 to 0.6 psi use 4.0 lbs./cubic foot Polyurethane
For Loading 0.5 to 1.0 psi use 4.0 lbs./cubic foot Polyethylene
Enter Chart 2 at the fragility level; proceed horizontally to intersect the curves at the required height of drop move vertically from this point of intersection down to the indicated foam thickness required. Repeat for each axis of drop.
Add to the size of the equipment, twice the thickness of foam. This will establish the optimum case size.
Foam Selector: for more information on different types of foams
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Last modified: 08/14/2013