A fastener assembly includes an elongated fastener body with a head end part. A propelling member supported on the fastener body, wherein the propelling member has a lengthened shape, wherein a portion of the lengthened shape extends around the head end part of the fastener body. A method of propelling the fastener assembly is also provided.

An insulated staple includes a staple including a crown extending between a pair of legs and an insulator including an insulator bridge extending between a pair of insulator legs and a channel extending from an end of one of the insulator legs to an end of the other of the insulator legs. The staple is at least partially received in the channel. A width of the channel at the insulator bridge is greater than a thickness of the staple crown. The insulator includes protrusions extending into the channel and defining therebetween a gap that, in absence of the staple, has a width less than the width of the staple crown to provide a friction fit between the staple crown and the insulator.

According to an embodiment, a cap for waterproofing a nail comprises a cap body and a tightening protrusion. The cap body includes a flat penetration portion and an edge portion extending from the penetration portion and inclined downward. The cap body is formed of a hard material which may be penetrated by a nail. The tightening protrusion is spaced apart inward from an end of the edge portion by a predetermined distance and protruding downward from a lower surface of the cap body. A thickness of the tightening protrusion is smaller than a thickness of the edge portion.

According to an embodiment, a cap for waterproofing a nail comprises a cap body and a tightening protrusion. The cap body includes a flat penetration portion and an edge portion extending from the penetration portion and inclined downward. The cap body is formed of a hard material which may be penetrated by a nail. The tightening protrusion is spaced apart inward from an end of the edge portion by a predetermined distance and protruding downward from a lower surface of the cap body. A thickness of the tightening protrusion is smaller than a thickness of the edge portion.

The present disclosure provides a concrete structure strengthened using a grid reinforcement material and non-shrink grout and a method of strengthening the same in which, when strengthening a concrete structure such as a concrete slab or a concrete wall body that is damaged or deteriorated, a grid reinforcement material is mounted on one side of the concrete structure, a formwork is formed on an outer side of the grid reinforcement material to have a required gap, and then the gap is filled with non-shrink grout so that the non-shrink grout is cured therein to strengthen the old concrete structure, thereby being able to automatically fill and repair cracks formed in the concrete structure just by injecting the non-shrink grout without separately performing crack repair on the old concrete structure. Also, the grid reinforcement material may be easily fixed or mounted using a grid fixing device and may be easily applied to strengthening of a concrete structure having a curved surface as well as a concrete structure having a flat surface such as a concrete slab or a concrete wall body. In addition, reinforcing bars may be additionally arranged in a gap between a surface of the concrete structure and the grid reinforcement material so that the grid reinforcement material increases a cover thickness, and thus the concrete structure is remarkably strengthened.

The present disclosure provides a concrete structure strengthened using a grid reinforcement material and non-shrink grout and a method of strengthening the same in which, when strengthening a concrete structure such as a concrete slab or a concrete wall body that is damaged or deteriorated, a grid reinforcement material is mounted on one side of the concrete structure, a formwork is formed on an outer side of the grid reinforcement material to have a required gap, and then the gap is filled with non-shrink grout so that the non-shrink grout is cured therein to strengthen the old concrete structure, thereby being able to automatically fill and repair cracks formed in the concrete structure just by injecting the non-shrink grout without separately performing crack repair on the old concrete structure. Also, the grid reinforcement material may be easily fixed or mounted using a grid fixing device and may be easily applied to strengthening of a concrete structure having a curved surface as well as a concrete structure having a flat surface such as a concrete slab or a concrete wall body. In addition, reinforcing bars may be additionally arranged in a gap between a surface of the concrete structure and the grid reinforcement material so that the grid reinforcement material increases a cover thickness, and thus the concrete structure is remarkably strengthened.

A roofing fastener has an anchor plate, a staple, and a hollow shank extending perpendicularly away from the anchor plate. The staple is insertable within the hollow shank, and one or more free ends of the staple is extendable from an opening in a free end of the hollow shank. The anchor plate has a raised bonding surface with adhesive and heat sinks dispersed thereabout. The anchor plate and hollow shank may be separable or a single connected structure. In operation, the roofing fastener is inserted within a substructure about the hollow shank, such that the anchor plate rests atop an upper surface of the substructure. The staple is then depressed within the hollow shank such that one or more free ends of the staple penetrate the substructure at an angle relative to the hollow shank. A single-ply membrane is welded to the anchor plate via the adhesive.

A staple holds and binds two portions on both sides of a cord wound around to-be-bound object. This staple is provided with a pair of leg parts and a crown part connecting the pair of leg parts. The crown part is formed with a mountain portion bent inwardly.

A nail for a nail setting tool comprises a predominantly lignocellulosic material. The nail has a nail shank, at the front end of which is a nail tip in the form of a conical round tip. At the rear end region is a head region. The tip angle of the nail tip is >40°.

A one piece staple strip is provided, including: a plurality of staples, each of the plurality of staples including two leg portions and a crown portion connected with and between the two leg portions; a connection portion, connected with and between every neighboring two staples of the plurality of staples; and a stop portion, projecting laterally from the leg portion of each of the plurality of staples and defining a holding space with the crown portion of each of the plurality of staples, the holding space being configured to receive a cable; wherein each of the two leg portions of each of the plurality of staples includes a spike section extending from the stop portion.