A swivel connector for a spray gun includes a first portion, the first portion including a first interior passage that extends entirely through the first portion along a longitudinal axis and a second a second interior passage that extends along a first axis perpendicular to the longitudinal axis. The swivel connector also includes a second portion coupled to the first portion, the second portion including a third interior passage that extends entirely through the second portion along the longitudinal axis, and a fourth interior passage that extends along a second axis perpendicular to the longitudinal axis. The swivel connector also includes a connector pin coupled to both the first portion and the second portion, wherein the connector pin includes a fifth interior passage that extends along the longitudinal axis.

The present invention discloses a frame tube recombination cover plate for a cast-in-situ wall core building block mold, including a bearing type cover plate and a partition type cover plate, wherein a plurality of flat plates on upper surfaces of model walls corresponding to the two types of cover plates for the cast-in-situ wall core building block mold are removed; more than three flat plates (2) perpendicularly connected with front and rear flat plates are equidistantly added between left and right outer edges of the front and rear flat plates (1) at intervals; then, the left and right outer edges of the front and rear flat plates (1) are connected with a plurality of lower convex semi-circular tubes (8) below; and hollow sections of semi-cylinders (9) of the lower convex semi-circular tubes (8) below the flat plates (2) added to one of the left and right sides are blocked.

The present invention discloses a frame tube recombination cover plate for a cast-in-situ wall core building block mold, including a bearing type cover plate and a partition type cover plate, wherein a plurality of flat plates on upper surfaces of model walls corresponding to the two types of cover plates for the cast-in-situ wall core building block mold are removed; more than three flat plates (2) perpendicularly connected with front and rear flat plates are equidistantly added between left and right outer edges of the front and rear flat plates (1) at intervals; then, the left and right outer edges of the front and rear flat plates (1) are connected with a plurality of lower convex semi-circular tubes (8) below; and hollow sections of semi-cylinders (9) of the lower convex semi-circular tubes (8) below the flat plates (2) added to one of the left and right sides are blocked.

A swivel connector for a spray gun includes a first portion, the first portion including a first interior passage that extends entirely through the first portion along a longitudinal axis and a second a second interior passage that extends along a first axis perpendicular to the longitudinal axis. The swivel connector also includes a second portion coupled to the first portion, the second portion including a third interior passage that extends entirely through the second portion along the longitudinal axis, and a fourth interior passage that extends along a second axis perpendicular to the longitudinal axis. The swivel connector also includes a connector pin coupled to both the first portion and the second portion, wherein the connector pin includes a fifth interior passage that extends along the longitudinal axis.

A method of making a corrugated metal deck assembly including an elongated corrugated metal deck portion having substantially longitudinally extending, generally U-shaped peaks and valleys. One or more support channels are formed integrally with the corrugated metal deck portion prior to casting concrete thereon. Each of the support channels are configured with a generally U-shaped cross-section having generally opposed side walls having leg portions extending generally laterally inwardly from the corresponding side walls and defining a slot facing generally downwardly from the corrugated metal deck. The support channels are adapted for receiving therethrough and supportably engaging at least portions of anchors or support items. The slots may be provided with one or more internal threads into which externally threaded portions of anchors or support items may be screwed to fixedly attach the anchors or support items to the one or more integrated support channels.

The present invention discloses a frame tube recombination cover plate for a cast-in-situ wall core building block mold, including a bearing type cover plate and a partition type cover plate, wherein a plurality of flat plates on upper surfaces of model walls corresponding to the two types of cover plates for the cast-in-situ wall core building block mold are removed; more than three flat plates (2) perpendicularly connected with front and rear flat plates are equidistantly added between left and right outer edges of the front and rear flat plates (1) at intervals; then, the left and right outer edges of the front and rear flat plates (1) are connected with a plurality of lower convex semi-circular tubes (8) below; and hollow sections of semi-cylinders (9) of the lower convex semi-circular tubes (8) below the flat plates (2) added to one of the left and right sides are blocked.

The present invention discloses a frame tube recombination cover plate for a cast-in-situ wall core building block mold, including a bearing type cover plate and a partition type cover plate, wherein a plurality of flat plates on upper surfaces of model walls corresponding to the two types of cover plates for the cast-in-situ wall core building block mold are removed; more than three flat plates (2) perpendicularly connected with front and rear flat plates are equidistantly added between left and right outer edges of the front and rear flat plates (1) at intervals; then, the left and right outer edges of the front and rear flat plates (1) are connected with a plurality of lower convex semi-circular tubes (8) below; and hollow sections of semi-cylinders (9) of the lower convex semi-circular tubes (8) below the flat plates (2) added to one of the left and right sides are blocked.

Systems and methods for treating concrete, which includes the steps of wetting a surface of concrete with colloidal silica, allowing time for the colloidal silica to penetrate the concrete surface, and cutting the surface of the concrete with a bladed or segmented tool wherein the longitudinal blade or edge portion is positioned approximately at an angle between 30 degrees and 90 degrees relative to the surface of the concrete.

Systems and methods for treating concrete, which includes the steps of wetting a surface of concrete with colloidal silica, allowing time for the colloidal silica to penetrate the concrete surface, and cutting the surface of the concrete with a bladed or segmented tool wherein the longitudinal blade or edge portion is positioned approximately at an angle between 30 degrees and 90 degrees relative to the surface of the concrete.

Disclosed is a building frame structure having an edge beam and a construction method thereof. The frame structure includes: a main frame structure and a cantilever beam provided outside of the main frame structure, a beam supported by the cantilever beam, and an outer floor disposed between the main frame structure and the edge beam. The edge beam and the cantilever beam are preforms reserved with exposed reinforcing bars, respectively. The edge beam is provided thereon with a vertical sideboard and a temporary safety rail. The cantilever beam is a beam-shell structure provided with an inner recess. The outer floor is a laminated plate, a lower part of which is a preformed plate. The preformed plate, the edge beam, and the cantilever beam are connected to each other by concrete cast in situ at respective top portions thereof.