Abstract: A tray assembly is provided. The assembly comprises a tray, at least one width reinforcement component affixed to the tray, and at least one length reinforcement component affixed to the at least one reinforcement component.

Abstract: A clip system for attaching accessories to headgears is provided. The clip system comprises a clip assembly having a first clip attachable to a first accessory, and a first clip-receiving adaptor attachable to a headgear. The first clip-receiving adaptor receives and fastens the first clip.

Abstract: A plant growing tray system, comprising a plurality of trays sequentially connected to each other via substantially impermeable inter-tray joints. Each of the plurality of trays extends between respective first and second lateral ends and has a respective plant growing space portion vertically recessed relative to respective first and second lateral ends in-between. Each inter-tray joint includes a male part positioned at a first horizontal longitudinal end of a tray and elongated between the respective first and second lateral ends of the tray, a female part complementary to the male part positioned at a second horizontal longitudinal end of an adjacent tray and elongated between the first and second lateral ends of the adjacent tray, and a substantially impermeable interstitial medium configured to be compressed between the male and female parts to generate residual stresses to at least partially support a tray load and mitigate leakage.

Abstract: Modular dwellings comprise attached wall members that enclose an interior area, and a central truss system extending across the dwelling. A lower roof member is supported by a truss system lower chord and wall member, and an upper roof member is supported by a truss system upper chord and a wall member. The ends of the truss system are supported by a vertical post. The upper part of a wall section and of the upper chord are in co-planar alignment and the lower chord and the upper part of another wall section are in co-planar alignment. Wall panels include an internal frame and a tongue on one side and a groove on the other side which mate with the tongues and grooves of other like panels to compress resiliently deformable seals. A frame portion positioned at the internal side of the extension supports the extension for proper alignment during construction.

Abstract: Modular dwellings comprise attached wall members that enclose an interior area, and a central truss system extending across the dwelling. A lower roof member is supported by a truss system lower chord and wall member, and an upper roof member is supported by a truss system upper chord and a wall member. The ends of the truss system are supported by a vertical post. The upper part of a wall section and of the upper chord are in co-planar alignment and the lower chord and the upper part of another wall section are in co-planar alignment. Wall panels include an internal frame and a tongue on one side and a groove on the other side which mate with the tongues and grooves of other like panels to compress resiliently deformable seals. A frame portion positioned at the internal side of the extension supports the extension for proper alignment during construction.