The Atmospheric Pressure Load Calculator provides a plot of VIG U-value as a function of support pillar array spacing. The plot is interactive. The values of array spacing and U-value are shown when you hover your mouse over the red curve. The plot also shows the curves representing the differences between the compressive surface stress of VIG and various fracture limit pressures. You can use them to find an optimal array spacing allowing to combine low U-value with acceptable compressive stress (below fracture limit). The point, where U-value curve intersects the curve corresponding to Contact Fracture Limit or Above Spacer Fracture Limit or any other limit (whichever comes first), indicates the maximum allowed array spacing. The detail of the calcilation can be found in Background Theory here.
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