A wall structure having a horizontal base stud, which wall structure has an upper wall panel, and a horizontal base stud, wherein the base stud has openings to allow for liquids to escape in the event of a plumbing leak, and additional openings to allow for air flow from the exterior to the interior of the wall structure.

A molding piece, comprising a molding piece structure and at least a first magnetic element, wherein cross-sections of the molding piece structure along imaginary planes perpendicular to the molding piece structure imaginary axis are substantially the same size and shape. In some embodiments, the first magnetic element is in a first groove in the molding piece structure, cross-sections of the first magnetic element along said imaginary planes are substantially the same size and shape, and/or the molding piece structure further comprises a protruding rib. Also, a removably engaging device, comprising a removably engaging device structure and a first element, wherein the first element comprises a magnetic element and/or a magnet-adhering element. In some embodiments, a removably engaging device structure comprises a rib and/or a groove. Also, kits and systems comprising molding pieces and removably engaging devices, and methods.

A system for crown molding that enables safely incorporating electrical and communications cabling within crown molding by creating one or more protected paths which inherently prevent overly sharp bends in crown molding corners and by mitigating damage from penetrating punctures through a decorated face designed to fracture when improperly penetrated by a screw or nail, and enables the secure installation of hardware either concealed within the molding or securely and favorably positioned through the decorative face to view or sense a room, and enables additional cable capacity that is concealed within a light reflector to increase lighting efficacy as well as power and data delivery capacity.

A system for crown molding that enables safely incorporating electrical and communications cabling within crown molding by creating one or more protected paths which inherently prevent overly sharp bends in crown molding corners and by mitigating damage from penetrating punctures through a decorated face designed to fracture when improperly penetrated by a screw or nail, and enables the secure installation of hardware either concealed within the molding or securely and favorably positioned through the decorative face to view or sense a room, and enables additional cable capacity that is concealed within a light reflector to increase lighting efficacy as well as power and data delivery capacity.

Modular Construction elements are characterized by a variety of profiles and associated interchangeable components and/or inserts. Together, these structures and components allow the end user to incorporate dissimilar or similar materials having a wide range of thicknesses and geometries into a flanged associated with the construction elements and tailored to its particular profile. Through the use of a unique set of interconnection methods and systems, a relatively small set of elements can be arranged to protect the surfaces of a wide array of interior surface treatments and the intersections of those surfaces. Dimensional material can be configured to provide the desired form of intersection and transition type—e.g., horizontally to horizontally, horizontal to vertically, vertical to vertical, vertically to horizontally, and the like—while at the same time creating and maintaining a sealed, sanitary and watertight condition within a specified area.

A wall structure having a horizontal base stud, which wall structure has an upper wall panel, and a horizontal base stud, wherein the base stud has openings to allow for liquids to escape in the event of a plumbing leak, and additional openings to allow for air flow from the exterior to the interior of the wall structure.

A mobile home skirting base comprising: a horizontal surface; and two substantially equal, substantially symmetrical vertical surfaces co-extruded with the horizontal surface forming a channel to insert a mobile home skirting panel wherein the vertical surfaces each having an inwardly oriented retention edge that secure the mobile home skirting panel. The height of the vertical surfaces and the inward orientation of the vertical surfaces' retention edges, along with the other aspects of the invention, allows the mobile home skirting base to provide strong support, stabilization, and protection of the skirting panels.

A mobile home skirting base comprising: a horizontal surface; and two substantially equal, substantially symmetrical vertical surfaces co-extruded with the horizontal surface forming a channel to insert a mobile home skirting panel wherein the vertical surfaces each having an inwardly oriented retention edge that secure the mobile home skirting panel. The height of the vertical surfaces and the inward orientation of the vertical surfaces' retention edges, along with the other aspects of the invention, allows the mobile home skirting base to provide strong support, stabilization, and protection of the skirting panels.

An optical element having stray light suppression structure includes a main body which is ring-shaped and defines an axial direction. The main body has an inner peripheral face and an outer peripheral face. The main body is for being arranged inside a lens mount. The main body has a first end and a second end along the axial direction and has plural stray light suppression structures on the inner peripheral face. The stray light suppression structures are spacedly arranged around the axial direction. A surface of each stray light suppression structure is non-coplanar with the inner peripheral face. Each stray light suppression structure has a third end closer to the first end and a fourth end closer to the second end. Each stray light suppression structure has an extension path at least partially nonoverlapping a line defined from the third end to the fourth end.