A concrete dowel placement system and methods for making the same. The system allows for accurate and easy substantially-parallel or parallel placement of slip dowels within sections of concrete so that adjacent sections of concrete may be allowed to undergo thermal expansion and contraction while remaining in a common plane without cracking or faulting. The system includes a coupler and a sheath. The sheath is configured to be slidably extensible over the coupler and may be held to the coupler by friction. An outer surface of the sheath may be textured. Additionally, a method of constructing the concrete dowel placement system includes extruding material to form two tubes of different sizes. The tubes are then attached to each other, then material is extruded or injection molded to form a sheath. Alternatively, construction may include extruding material to form a tube, then removing some of the material from the tube in order to form a coupler.

A horizontal support apparatus and method are provided for use with any structure having a horizontal span, including but not limited to doors, garages, and windows. The horizontal support apparatus may include two support columns, a lintel that is configured to be attached to the support columns, and that includes a vertical flange and a horizontal flange. The apparatus may include two lift bolts coupled to two end portions of the horizontal flange. The two lift bolts may be configured to respectively raise the two end portions of the horizontal flange. The apparatus may include two rotatable lift nuts that, when rotated, raise the lift bolts to engage and raise the two ends of the horizontal flange.

A flooring system has at least one girder, a first joist coupled to a first side of the girder, and a second joist coupled to a second side of the girder. The flooring system further comprises a joist tightening system that has a first end coupled to the first joist and a second end coupled to the second joist, the joist tightening system pulls the first joist and the second joist toward the girder thereby tightening the first joist and the second joist.

An apparatus guides first and second assembly components into a predetermined configuration, each assembly component including an opening. When the assembly components are aligned into the predetermined configuration, their openings align to define a cavity for receiving a stepped dowel to fasten the components together. The guiding apparatus includes a stepped dowel member having successively-smaller dowel sections, and a collar member floating around the base of the stepped dowel member. The stepped dowel member tip can be passed through the first assembly component opening and inserted into the second assembly component opening, drawing the components into the predetermined configuration. When the components are aligned into the predetermined configuration, the collar member engages the first assembly component opening and the stepped dowel member engages the second assembly component opening. The guiding apparatus can be disengaged, freeing the dowel-receiving cavity to accept a stepped dowel for fastening the assembly components together.

The present invention relates to a device for connecting and separating masonry units, preferably bricks, which comprises a tubular body that fits the tubular shape of holes in the bricks. The device for connecting and separating comprises a portion that has a straight cross-section larger than the cross-section of the tubular body and disposed approximately midway along the length of the connector device, for separating the bricks that said device connects. The device also comprises at least one depression or channel along the entire length of the tubular body, the depression or channel acting as a spring. The connector allows walls to be assembled using only bricks and connectors so as to apply mortar ex post.

The present invention relates to a device for connecting and separating masonry units, preferably bricks, which comprises a tubular body that fits the tubular shape of holes in the bricks. The device for connecting and separating comprises a portion that has a straight cross-section larger than the cross-section of the tubular body and disposed approximately midway along the length of the connector device, for separating the bricks that said device connects. The device also comprises at least one depression or channel along the entire length of the tubular body, the depression or channel acting as a spring. The connector allows walls to be assembled using only bricks and connectors so as to apply mortar ex post.

Portable apparatus for application of double-sided sheet adhesive to modular flooring products, includes a planar platform; a flooring guide; a roll of double-sided sheet adhesive unrolled onto the platform for marrying with the modular flooring product; a sheet adhesive guide to maintain the sheet adhesive in alignment with the flooring guide and the modular flooring product, and to tension the sheet adhesive as it is applied to the flooring product; and a press roll to apply pressure to mate the sheet adhesive to the flooring product.

A system for spacing rafters can include an outer member, an inner member, jaws, and a handle. The handle can be movably connected to the inner member and the outer member. The jaws can be secured to the inner member or the outer member. The handle can be operable to move the jaws with respect to each other to equally space the rafters with respect to each other.

A marking apparatus includes a marking apparatus main body including a target, a traveling mechanism for automatically traveling on a traveling surface, and a printer, and a control unit configured to control the printer and the mechanism. The control unit controls the traveling so that the mechanism automatically travels along a set traveling route, the control unit compares position coordinates of the marking apparatus main body obtained from three-dimensional position coordinates of the target during traveling input at predetermined intervals with the traveling route, and corrects traveling to eliminate a deviation from the traveling route, the control unit controls the printer so as to print the marking information set at a position corresponding to the position coordinates of the marking apparatus main body, and traveling route data setting the traveling route and marking information data defining the marking information are created based on CAD design data.

A marking apparatus includes a marking apparatus main body including a target, a traveling mechanism for automatically traveling on a traveling surface, and a printer, and a control unit configured to control the printer and the mechanism. The control unit controls the traveling so that the mechanism automatically travels along a set traveling route, the control unit compares position coordinates of the marking apparatus main body obtained from three-dimensional position coordinates of the target during traveling input at predetermined intervals with the traveling route, and corrects traveling to eliminate a deviation from the traveling route, the control unit controls the printer so as to print the marking information set at a position corresponding to the position coordinates of the marking apparatus main body, and traveling route data setting the traveling route and marking information data defining the marking information are created based on CAD design data.