Direct tension indicator for embedded anchor members

A device for indicating attainment of a predetermined compressive load applied to said device, said device being formed to receive an anchor member upon which a tensioning force is to be applied in conjunction with loading said device, said anchor member having a long axis and an outer surface, said device comprising:

• a. an upper press, having an aperture formed to receive said anchor member, said upper press also having a shearing formation and a bearing surface lying inwardly of said shearing formation;
• b. a lower die, having an aperture formed to receive said anchor member, said lower die formed so as to be able to nest with said upper press when said upper press and lower die are aligned and moved towards each other, said lower die also having a shearing formation formed to cooperate with said shearing formation of said upper press, and a bearing surface formed to cooperate with said bearing surface of said upper press;
• and
• c. a washer lying between said upper press and said lower die, said washer being formed so as to have an outer portion that can be broken between said shearing formations of said upper press and said lower die, said washer also having one or more projecting portions that extend inwardly from said outer portion toward said anchor member received by said lower die, said one or more projecting portions also extending at an angle less than ninety degrees to said long axis of said anchor member for a portion of their length, said inwardly and angularly extending one or more projecting portions of said washer being formed to be pressed into said anchor member by said cooperating bearing surfaces of said upper press and said lower die.

An apparatus for applying a tension load to an anchor member connected to a steel member, said apparatus comprising:

• a. said anchor member having threads;
• b. said steel member being adhesively bonded to said anchor member;
• c. a lower die, having an aperture receiving said anchor member, said lower die also having a shearing formation;
• d. an upper press, having an aperture receiving said anchor member, said upper press formed so as to be able to nest with said lower die when said upper press and said lower die are aligned and moved towards each other, said upper press also having a shearing formation formed to cooperate with said shearing formation of said lower die;
• e. a washer lying between said upper press and said lower die also receiving said anchor member, said washer being formed so as to have portions that can be broken between said shearing formations of said upper press and said lower die;
• and
• f. a nut attached to said threads of said anchor member.

An apparatus for applying a tension load to an anchor member held in a cementitious member by means of an adhesive member, said apparatus comprising:

• a. said anchor member having threads;
• b. said cementitious member receiving said anchor member in a blind opening in said cementitious member;
• c. said adhesive member joining said anchor member to said cementitious member;
• d. a lower die, having an aperture receiving said anchor member, said lower die also having a shearing formation;
• e. an upper press, having an aperture receiving said anchor member, said upper press formed so as to be able to nest with said lower die when said upper press and lower die are aligned and moved towards each other, said upper press also having a shearing formation formed to cooperate with said shearing formation of said lower die;
• f. a washer lying between said upper press and said lower die also receiving said anchor member, said washer being formed so as to have portions that can be broken between said shearing formations of said upper press and said lower die;
• and
• g. a nut attached to said threads of said anchor member.

A method of applying a tension load to a held anchor member to test said held anchor and then removing said tension load, said method comprising:

• a. slipping a lower die over said anchor member so that said lower die bears upon an unyielding bearing surface;
• b. slipping a washer over said anchor member and inserting said washer onto said lower die;
• c. slipping an upper press over said anchor member and onto said washer;
• d. tightening a nut onto said anchor member until said washer member is deformed in a manner such that it provides a visual indication that a given load has been applied to said washer and said washer has been pressed into said anchor member;
• e. removing said nut from said anchor member so that the compressive force is removed from said lower die, said washer and said upper press.