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Lightweight structural columns

  • US 4,259,821 A
  • Filed: 06/29/1977
  • Issued: 04/07/1981
  • Est. Priority Date: 06/29/1977
  • Status: Expired due to Term
First Claim
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1. A lightweight structural element adapted to be secured to a plurality of like members to form a truss structure comprising:

  • an elongated hollow body having a first end and tapering along the body length to a second end;

    a first fitting secured to said first end and so constructed and arranged as to form engaging surfaces for attachment to an identical fitting secured to another identical structural element, and a second fitting secured to said second end and having an extension thereon to facilitate attachment of said second end to other elements;

    said first fitting being provided with a first length slidably received within said first end of said hollow body, a second length thereof integral with said first length and forming an annular shoulder exteriorly along the circumference of said hollow body, and a third length thereof integral with said first and said second lengths and forming a plurality of equal width fingers disposed in equal spaced adjacency along the circumference of said second length and wherein the spacing between any two individual fingers is at least as wide as an individual finger, andsaid elongated body being formed of a graphite/epoxy composite material.

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