A construction method for a building is provided that includes the steps of: hoisting and positioning a plurality of precast columns on at least a portion of a predetermined area of a construction site to form a precast column array having at least two spans along a first direction and one or more spans along a second direction substantially perpendicular to the first direction; positioning the pre-fabricated beam rebar assemblies between adjacent precast columns, positioning each of the precast slab panels on support potions on the precast columns, assembling the beam cage and pouring the concrete into the molds for the beam cage to accomplish the structure of a single story; and repeating the steps of constructing the above-mentioned precast column array until completion of the structure of all stories of the building.

A construction method for a building is provided that includes the steps of: hoisting and positioning a plurality of precast columns on at least a portion of a predetermined area of a construction site to form a precast column array having at least two spans along a first direction and one or more spans along a second direction substantially perpendicular to the first direction; positioning the pre-fabricated beam rebar assemblies between adjacent precast columns, positioning each of the precast slab panels on support potions on the precast columns, assembling the beam cage and pouring the concrete into the molds for the beam cage to accomplish the structure of a single story; and repeating the steps of constructing the above-mentioned precast column array until completion of the structure of all stories of the building.

A staircase assembly is installed in a multi-story building, including first and second flights of stairs that are hingably coupled to a landing, and a plurality of vertically-oriented columns coupled to the landing. The staircase assembly is assembled into a first liftable floor plate, and is disposed in a folded arrangement when the liftable floor plate is positioned at an assembly level elevation. The staircase assembly is disposed in an unfolded arrangement when the first liftable floor plate is positioned at a first design level elevation and a second liftable floor plate that is positioned at a second design level elevation below the first liftable floor plate.

Improved tub girders and related manufacturing methods are provided, such as for example for use in road construction in connection with concrete bridges. Disclosed improved tub girders may include upper flanges that extending inwardly or outwardly. Disclosed improved tub girders may be provided with camber along the length of the girders. Ends of the disclosed improved tub girders may be provided with diaphragms. Disclosed improved tub girders may include a base section including one more access ports for enabling inspection of the interior of the girders after installation. Disclosed improved tub girders may include a plurality of stud members extending upwardly from upper flanges for engaging with a concrete bridge deck. Disclosed tub girders may be providing with a coating, such as galvanized, aluminized or metalized, to fight corrosion and extend life and limit need for inspection.

A framing device for a floor structure utilizing a glass floor unit having a durable glass portion and a fire-rated glass portion. A support is positioned to exert a force on the glass floor unit. A shield protects the surfaces of the glass floor unit and forms a pocket for the support.

A tub girder for use in road construction in connection with concrete bridges may include upper flanges that extend inwardly or outwardly and may be provided with camber along the length of the girders. Ends of the tub girders may be provided with diaphragms and may include a base section including one more access ports for enabling inspection of the interior of the girders after installation. The tub girders may include a plurality of stud members extending upwardly from upper flanges for engaging with a concrete bridge deck. The tub girders may be provided with a coating, such as galvanized, aluminized or metalized, to fight corrosion and extend life and limit need for inspection.

The present invention relates to a concrete structure for constructing a building floor and a building floor construction structure including the same. The present invention provides a concrete structure for constructing a building floor which forms a building floor foundation, including: a concrete main body to store fire-extinguishing water for fire suppression; and a fire-extinguishing water injection unit to inject the fire-extinguishing water stored in the concrete main body, and a building floor construction structure including the same. According to the present invention, the concrete structure for forming a building floor stores fire-extinguishing water, and thus early fire suppression is possible, building floor construction is facilitated, and excellent inter-floor sound insulation properties are provided.

The present invention relates to a concrete structure for constructing a building floor and a building floor construction structure including the same. The present invention provides a concrete structure for constructing a building floor which forms a building floor foundation, including: a concrete main body to store fire-extinguishing water for fire suppression; and a fire-extinguishing water injection unit to inject the fire-extinguishing water stored in the concrete main body, and a building floor construction structure including the same. According to the present invention, the concrete structure for forming a building floor stores fire-extinguishing water, and thus early fire suppression is possible, building floor construction is facilitated, and excellent inter-floor sound insulation properties are provided.

Provided are a hollow composite beam using a dual-web and a construction method thereof. The hollow composite beam using a dual-web can secure space efficiency using a tendon installed in an internal space of a dual-web and can efficiently adjust a tensioning force using the tendon anchored by an anchoring wedge and a separable bolt, wherein the dual-web is formed as a web of a steel beam having a bottom flange on which a deck plate is supported.

The invention relates to panelized system for a structure. The panelized system typically comprises a plurality of joists structured to be operatively coupled to one or more support members of the structure. Each of the plurality of joists are associated with a joist seat comprising a toe and one or more joist apertures. Typically, at least one or more of a plurality of joist seats are operatively coupled to the one or more support members using a toe weld between the toe and the one or more support members. However, an aperture weld between the one or more joist apertures and the support members is omitted. Moreover, a fastener between the one or more joist apertures and the support members is also omitted.