Girder supported reinforced concrete slab building structures with shearing connectors, and methods of constructing the building structures and connectors

In a reinforced concrete slab and girder building structure incorporating shearing connectors;

• a. a concrete slab of predetermined width and length;
• b. at least one slab support, underlying girder assembly having girders for receiving compressive load forces applied to said slab;
• c. spaced apart support walls free-spanned by said girders and supporting said girders at widely spaced locations;
• d. lengthwisely spaced shearing connectors at said wall locations spaced inboard of said walls, each of said connectors having at least a pair of transversely extending lengthwisely spaced generally vertical rigid load transfer web plates secured between upstanding lengthwisely extending, transversely spaced side plate members, said load transfer web plates and side plate members forming an enclosure, fixed by one of said girders to project upwardly from said one girder, and be embedded in said slab, said slab including a concrete portion filling each said enclosure;
• and
• e. compression force transfer members extending transversely in longitudinally spaced apart relation supported by said side plate members to transfer slab compressive forces to said web plates and girder;
• said side plate members having lengthwisely spaced openings of a size and shape to accommodate the compression force transfer members which extend through said openings and embed in the concrete portions filling said enclosures, said compression force transfer members projecting laterally from said side plate members and including diagonal portions extending lengthwisely and widthwisely in said slab.

In a reinforced concrete slab and girder building structure incorporating shearing connectors:

• a. a concrete slab of predetermined width and length;
• b. at least one slab support, underlying girder assembly having girders for receiving compressive load forces applied to said slab;
• c. spaced apart support walls free-spanned by said girders and supporting said girders at widely spaced locations;
• d. lengthwisely spaced shearing connectors at said wall locations spaced inboard of said walls, each of said connectors having at least a pair of transversely extending lengthwisely spaced generally vertical rigid load transfer web plates secured between upstanding lengthwisely extending, transversely spaced side plate members, said load transfer web plates and side plate members forming an enclosure, fixed by one of said girders to project upwardly from said one girder, and be embedded in said slab, said slab including a concrete portion filling each said enclosure;
• e. compression force transfer rebars extending from said side plate members transversely in longitudinally spaced apart relation supported by said side plate members to transfer slab compressive forces to said web plates and girder;
• f. said load transfer web plates being inset from the ends of said side plate members and having web sections projecting below the ends of said side plate members, said side plate members also having downwardly projecting portions to function with the said web sections to form lengthwisely outwardly facing compartments;
• said one girder being a wood beam having pockets in its upper face snugly receiving said downwardly projecting web sections and downwardly projecting side plate portions;
• and a compression resistant, settable and hardenable material which does not shrink or expand filling said outwardly facing compartments and transferring the shear load imparted by said end plates longitudinally to the grain of said beam without slippage.

In a method of constructing reinforced concrete slab and girder building structures incorporating shearing connectors with lengthwisely extending frame support parts to which lengthwisely spaced, transversely extending rigid load transfer plates affix, the steps of:

• a. supporting a girder structure having one or more lengthwisely extending girders at widely spaced locations defining an unsupported span of girder between them;
• b. affixing said connectors just inboard of each of said locations in widely spaced apart relation, the connectors being positioned so that the load transfer plates project above the girder structure;
• c. providing a slab support deck on said girder structure, the deck having openings to pass said connectors;
• d. mounting compression force transfer members having portions which extend outwardly from said connector and which have sections extending diagonally lengthwisely and widthwisely in said slab in lengthwisely spaced apart relation on said connector frame support parts transversely between said load transfer plates;
• e. casting a concrete slab over said deck to embed the said load transfer plates and rebars therein;
• and
• f. curing said slab.

In a method of constructing reinforced concrete slab and girder building structures incorporating shearing connectors with lengthwisely extending frame support parts to which lengthwisely spaced, transversely extending rigid load transfer plates affix, the steps of:

• a. supporting a girder structure having one or more lengthwisely extending wood beam girders having pockets opening through their upper surface at widely spaced locations defining an unsupported span of girder between them;
• b. affixing said connectors just inboard of each of said locations in widely spaced apart relation, the connectors being positioned so that the load transfer plates project above the girder structure, said load transfer plates having downwardly projecting portions extending into said pockets and bottoming portions connecting with said downwardly projecting portions;
• c. applying vertically extending fasteners to extend through said bottoming portions into said beam;
• and
• d. filling said pockets with a compression resistant, settable and hardenable material which does not shrink or expand, and which functions to transfer loads longitudinally from said downwardly projecting portions of said load transfer plates perpendicularly to the grain of said wood;
• e. providing a slab support deck on said girder structure, the deck having openings to pass said connectors;
• f. mounting slab compression force transfer elements in spaced apart relation on said connector frame support parts to transfer load to said load-transfer plates;
• g. casting a concrete slab over said deck to embed the said load transfer plates and compression force transfer elements therein;
• and
• h. curing said slab.

In a method of constructing reinforced concrete slab and girder building structures incorporating shearing connectors with lengthwisely extending frame support parts to which lengthwisely spaced, transversely extending rigid load transfer plates affix, the steps of:

• a. supporting a girder structure having one or more lengthwisely extending wood beam girders at widely spaced locations defining an unsupported span of girder between them;
• b. affixing said connectors lust inboard of each of said locations in widely spaced apart relation, the connectors being positioned so that the load transfer plates project above the girder structure, said connector support parts each comprising a pair of lengthwisely extending side plates and said load transfer plates being inset from the ends of said side plates, said load transfer plates having downwardly projecting portions extending below said side slates;
• c. cutting pockets into the tops of said beams of a size to snugly receive said connector downwardly projecting portions;
• d. inserting said connector downwardly projecting portions into said pockets;
• and
• e. filling said pockets with a compression resistant, settable and hardenable material, which does not shrink or expand to transfer shear loads endwisely to the wood grain;
• f. providing a slab support deck on said girder structure, the deck having openings to pass said connectors;
• g. mounting slab load transfer rebars in spaced apart relation on said connector frame support parts to project outwardly therefrom;
• h. casting a concrete slab over said deck to embed the said load transfer plates and rebars therein;
• and
• i. curing said slab.

A method of constructing a shearing connector for embedment in a concrete slab and for use to transfer loads to an underlying girder comprising the steps of:

• a. providing a lengthwisely extending horizontal steel frame part;
• b. rigidly fixing steel load transfer plates to said frame part to extend transversely relative thereto from the ends of said frame part;
• and
• c. machining lengthwisely spaced holes in said frame part between said load transfer plates through which rebars which embed in said slab can snugly extend.

In a reinforced concrete slab and girder building structure incorporating shearing connectors;

• a. a concrete slab of predetermined width and length;
• b. a deck beneath said slab;
• c. at least one slab support wood beam girder, having an upper face formed with pocket space therein, for supporting said deck and to receive compressive load forces applied to said slab;
• d. a compression load transfer shearing connector for each end of said girder having at least a pair of transversely extending, lengthwisely spaced, vertical rigid load transfer web plates secured between upstanding, lengthwisely spaced, side plate members, said load transfer web plates and side plate members forming an enclosure between said web plates and said side plate members, said connectors being fixed by said girder to project upwardly from said girder through said deck, said web plates also extending down into said pocket space and cooperating with cured compression resistant hardenable material filling said pocket space to transfer shearing load to the end grain of the wood beam girder, the connector enclosure being embedded in said slab to transfer compression loads to said web plates, and the slab having a concrete portion filling said enclosure.

In a method of constructing reinforced concrete slab and girder building structures incorporating compression load transfer shearing connectors with lengthwisely extending frame support parts to which lengthwisely spaced, transversely extending rigid generally vertical load transfer plates affix, the steps of:

• a. supporting a girder structure having one or more lengthwisely extending wood beam girders with lengthwisely spaced apart pockets opening through their upper surface, at widely spaced locations defining an unsupported span of girder between them;
• b. mounting said connectors just inboard of each of said locations in widely spaced apart relation, the connectors being positioned so that the load transfer plates have upper portions which project above the girder structure, said load transfer plates having downwardly projecting portions which are extended into said pockets;
• c. filling said pockets with a compression resistant, settable and hardenable material which does not shrink or expand, and which functions to transfer loads longitudinally from said downwardly projecting portions of said load transfer plates perpendicularly to the grain of said wood, and curing said material;
• d. casting a concrete slab to embed the said upper portions of the load transfer plates therein;
• and
• e. curing said slab.

In a concrete slab and girder building structure incorporating shear force connectors:

• a. a generally horizontal concrete slab extending widthwisely and lengthwisely;
• b. at least one generally horizontal slab support wood beam girder having an upper face formed with pocket spaces therein;
• c. a compression force load transfer shearing connector for each end of said girder embedded in said slab and having at least a pair of transversely extending, lengthwisely spaced, generally vertical rigid load transfer plates having upper portions embedded in said slab and lower portions received in said pockets;
• and
• d. cured compression resistant material filling said pockets to transfer shearing load to the end grain of the wood beam girder.