A core form device including a circular plate and a plurality of bendable arms extending from the circular plate which when bent about the circular plate form the core form device.

A drywall brace and system or method for using the same can include a body including a length L, a width W, and a thickness T. The body can include a first surface defined by a first plane comprising the length L and width W, a second surface opposite the first surface, and a first end sharpened to a point adapted to form an opening through drywall. A mounting aperture can be formed completely through a central portion of the body and be sized to receive a threaded bolt for mounting a device. A first portion and second portion of flexible line can be coupled within 3 centimeters (cm) of the mounting aperture. An adhesive can be coupled to the first surface of the body and covered with a removable adhesive protective layer. A cleaning pad can be coupled to the second surface of the body.

An Adjustable Hole Cover. One size of hole cover will accommodate a wide variety of hole diameters, and fit snugly. The device is made from a lightweight, yet durable material. A version having a cap with an internal metal core is also available. The cover costs less than prior plugs by incorporating a durable cap element to which a low-cost stem is attached. The stem is selected from a group of different-sized stems made from a low-cost material, such as wood.

A hole repair assembly includes a support. A connector is fastenable to the support. A closure can connect to the support with the connector. The support, connector and closure are configured so that the support and the closure can be connected and spaced from each other with the connector. One or more retaining members are arranged on one or both of the support and the connector to extend from the connector.

The present apparatus and method relates in general to sealing a hole in a floor with a precast plug. A precast plug is created by pouring a wet aggregate mix into a form mold and thereafter inserting a pre formed rod into the uncured mixture, positioning it such that the center of the rod rests in the center of the form mold and the ends of the rod extend outward near the top of the form mold. The mix is then cured. The precast plug may then be transported to the hole that it is destined to fix. Grooves may be carved on either side of the hole to accommodate the rod' s ends. The interior of the hole and the exterior of the plug may then be covered with a sealant, after which the plug may be inserted into the hole. Once the sealant cures, the hole is fully repaired.

A crack repair method includes a build-up welding step of performing build-up welding on a portion of an existing steel structure where a crack is generated while feeding a filler wire, and a laser beam piercing welding step of performing piercing welding using a laser beam on a filler material build-up portion caused by the build-up welding in the build-up welding step and the crack. The crack can be melted and repaired without lowering a toughness value regardless of an operation condition.

A construction process for enhancing or repairing a concrete floor structure that includes a carbon fiber grid as a reinforcement component is disclosed. The process includes forming a trench at a top surface of the concrete floor structure, and placing a reinforcement material in the formed trench. Then, a concrete bonding agent is applied into the trench. Then, the trench is filled with concrete. As a result, the concrete floor structure is enhanced or repaired to have at least one additional reinforcement component other than the carbon fiber grid.

Disclosed herein are concrete and asphalt crack filler compounds and methods for utilizing them. According to some embodiments, the crack filler compounds can include (1) silica sand, (2) ethylene vinyl acetate, (3) and cement, and/or (4) color additives. According to some embodiments, a method of utilizing one of the compounds can include the steps of (1) obtaining a surface crack filler compound, (2) depositing the surface crack filler compound into a surface crack (e.g., concrete, asphalt, etc.), and (3) depositing water onto the surface crack filler compound to cause the surface crack filler compound to solidify and fill the surface crack. Additionally, and according to some embodiments, the method can further include, prior to depositing the surface crack filler compound into the surface crack: removing debris from the surface crack using at least one of a brush, pressurized air, or pressurized water.

As may be implemented in accordance with one or more aspects characterized herein, a wall patch is adhered to a wall surface having a damaged region. The wall patch has a base layer and a plurality of layers of transparent material stacked on the base layer, with the base layer being visible through the transparent material and therein aligned around the damaged region. A surface coating is applied to an area of the wall surface around the wall patch and to the wall patch, after which a top removable layer of the wall patch is removed to expose a top surface of an underlying one of the layers. A further coating is applied to the exposed top surface of the underlying layer, and to the area of the wall surface around the wall patch.

A repair compound for use in all applications and particularly well-suited for large hole repair. The repair compound includes a latex resin, a thickener, fibers, and a filler material. In some embodiments, the repair compound is configured to exhibit pseudoplastic-type behavior. In some embodiments, the repair compound has a density of not greater than 4.0 lbs/gal. In some embodiments, the repair compound includes hydrophobic and hydrophilic fibers of different morphologies. In some embodiments, the repair compound includes HASE-type thickeners. In some embodiments, the repair compound includes a bimodal distribution of hollow glass microspheres from two different strength/size curves.