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Index Entry
Surface Strength of Structures:
“The structural strength at the surface is not provided by the ‘solid’ quality of the exterior shell, but by triangularly interstabilized lines of force operative within that shell. They perforate the shell with force lines. The minimum holes are triangular. The piercing of the shells with triangular holes reduces the solid or continuous surface of second power increase of the shells and brings the rate of growth of the structures into something nearer an overall first power or linear rate of gain-- for the force lines are only linear.”
(Slightly rewritten)
STRUCTURE - SEC. 616.02 (Gray) + 03
