Abstract: The present invention consists of an assembly of materials, particularly wood-plastic composite or polymer for construction or building purposes, consisting in a matrix of these materials wherein a rod is inserted, a cable or a chord of reinforcement in a place of the tension loads, to increase the total capacity of mechanical resistance of the assembly and more particularly flexural properties. The invention thus consists of a solidified matrix using one or several rods inserted in the matrix so that the rod takes the tension stresses to increasing resistance to bending. A hardening resin may be injected in the place of a rod, or combined with it. The rods are inserted in the area undergoing the maximum of tension or at any other place in order to offer durability and an increased resistance. Various configurations of assemblies can be used, such as for example, a T, an I, a M, a H or any other form of section.

Abstract: A displaceable working apparatus provided with a platform having an extensible boom and being displaced on a guide rail is disclosed. The apparatus has a main frame secured to a main support which is movably secured to the guide rail and a main stabilizing mechanism for immovably securing the main frame to the adjacent roof surface. An extensible boom having a working free end which is equipped with a working element and is pivotally secured to a rotating support base positioned under the main frame. The boom is rotatable on the rotating support base and is angularly positionable with respect to the rotating support base. A drive is mounted on the frame to displace the platform along the guide rail.

Abstract: A displaceable working platform comprising a main frame having stabilizing extension posts secured thereto for immovably securing the main frame to surrounding surfaces. A displaceable platform is slidingly secured to the main frame. The platform is displaceable on the main frame from a storage position to a working position. An extensible boom is secured on a rotating support base which is secured to the displaceable platform. The boom has a working free end at which a working element is secured. The rotating support base is rotatable by a motor and a boom is extensible by an hydraulic system which is also provided to regulate the angular position of the boom by controlling hydraulic pistons connected between the boom telescopic sections, and the rotating support base.