Fastening system for angle plates

An angle plate fastening system for interconnecting adjoining structural members to form a framework, said structural members having flat sides disposed at 90 degrees relative to one another, said system comprising:

• (a) a framework interiorly located first angle plate member comprised of:
• (1) two flattened side walls angularly generally disposed at 90 degrees relative to one another which are integrally interconnected along a common edge, and which have a first hole extending through said edge, and
• (2) a pair of flattened end walls, each one thereof angularly integrally extending from a different one of said side walls along a respective edge thereof which is adjacent said common edge, each said end wall having a first opening therein;
• (b) a framework exteriorly located second angle plate member comprised of:
• (1) two flattened side walls angularly generally disposed at 90 degrees relative to one another which are integrally interconnected along a common edge, and which have a second hole extending through said edge,
• (2) said second hole being alignable with said first hole when such a first structural member is disposed between said first and said second plate member,
• (c) screw means extendable into said first and said second hole when said holes are so aligned with each other and with a hole defined in such so disposed structural member for fastening said first and said second angle plate members together with said structural member therebetween;
• (d) a framework interiorly located third angle plate member comprised of:
• (1) two flattened side walls angularly generally disposed at 90 degrees relative to one another which are integrally interconnected along a common edge, and
• (2) a pair of flattened end walls, each one thereof angularly integrally extending from a different one of said side walls along a respective edge thereof which is adjacent said common edge, each said end wall having a second opening therein;
• (3) said third angle plate member cooperating with said first angle plate member to position therebetween respective termini of a second and a third such structural member with said second opening being alignable with said first opening in each of said respective end walls when said respective second and third structural members as so positioned therebetween;
• and
• (e) fastening means extending through said first and said third openings when said holes are so aligned with each other and with said so positioned second and third structural members likewise having aligned holes therein for retaining said so positioned members in such assembled relationship.