Modular reinforcement cages for ductile concrete frame members and method of fabricating and erecting the same

A grid for use in the fabrication of ductile reinforced concrete construction members, said grid comprising:

• (a) a plurality of first generally parallel steel wire members;
• (b) a plurality of second generally parallel steel wire members welded to said plurality of first generally parallel steel wire members, said first wire members being generally perpendicular to said second wire members such that intersections thereof are formed;
• (c) said first and second wire members defining a rectangle;
• and
• (d) at least one roller disposed upon at least one of said first and second wire members such that at least one rebar member may be changed through said grid thereover, said roller reducing friction between said rebar member and said grid to enhance the changing process.

A ductile reinforced concrete construction member comprising:

• a) a plurality of prefabricated grids disposed in generally parallel stacked relationship, each of said grids comprised of intersecting first and second rebar members;
• b) a plurality of third rebar members charged through said prefabricated grids;
• c) concrete generally encapsulating said grids and rebar members;
• and
• d) a plurality of wire ties disposed at a plurality of the intersections of said first and second rebar members, one end of said wire ties being attached firmly to the first rebar member and the opposite end thereof being attached loosely to the second rebar member to facilitate tightening thereof about said third rebar members charged through said grids.

A ductile reinforced concrete construction member comprising:

• a) a plurality of prefabricated grids disposed in generally parallel stacked relationship, each of said grids comprised of intersecting first and second rebar members;
• b) a plurality of links interconnecting adjacent generally parallel stacked grids for defining a distance therebetween;
• c) a plurality of third rebar members charged through said prefabricated grids;
• d) concrete generally encapsulating said grids and rebar members;
• and
• e) a plurality of wire ties disposed at a plurality of the intersections of said first and second rebar members, one end of said wire ties being attached firmly to the first rebar member and the opposite end thereof being attached loosely to the second rebar member to facilitate tightening thereof about said third rebar members charged through said grids.

A ductile reinforced concrete construction member comprising:

• a) a plurality of prefabricated grids disposed in generally parallel stacked relationship, each of said grids comprised of intersecting first and second rebar members;
• b) a plurality of third rebar members charged through said prefabricated grids;
• c) at least one roller formed upon at least one of said grids such that at least one of said third rebar members may be charged through said grid thereover, said roller reducing friction between said rebar member and said grid to enhance the charging process;
• d) concrete generally encapsulating said grids and rebar members;
• and
• e) a plurality of wire ties disposed at a plurality of the intersections of said first and second rebar members, one end of said wire ties being attached firmly to the first rebar member and the opposite end thereof being attached loosely to the second rebar member to facilitate tightening thereof about said third rebar members charged through said grids.