NOVELTY - The material has a triangular shaped elongated hollow section forming a hollow triangular pyramid with three edges, sides or legs that form high strength structural wall components and structural roof components by connecting a series of hollow sections together by a watertight fastener unit. The hollow section includes a linear absorber that absorbs solar radiation to generate solar thermal power by concentrating sunlight with concentrated energy that is transferred through the absorber to an internal thermal fluid for heat transfer.    USE - Solar thermal energy concentrating building material for providing a high strength green building envelope to construct a waterproof enclosed space and generate concentrating solar power in a building.    ADVANTAGE - The material acts as a green building envelope consisting of complete load-bearing roof and wall systems, thus providing an improved substitute for building envelope systems such as metal siding and wood. The material is readily applicable to pre-manufactured building systems, pre-engineered metal frame building packages, manufactured homes and stud-built custom construction. The material is inexpensive and maintains a low product profile for lower wind resistance. The material has triangular or pyramid shape for increasing wind resistance via 45 degree sloped angle, and can withstand extremes of wind force such as wind storms, hurricanes and tornadoes, due to high strength of the solar building material. The linear absorber absorbs solar radiation to generate concentrating solar thermal power by concentrating the sunlight to two times or greater than its normal intensity with the concentrated energy that is transferred through the absorber to the internal thermal fluid for heat transfer, thus providing a heat source for a thermal power cycle such as Ericcson power cycle, with the solar heat for space heating, cooling, water heating, cooking, clothes drying, water desalination and producing natural lighting for an interior space within the building, and saving energy.    DESCRIPTION OF DRAWING(S) - The drawing shows a photographic view of an extruded interlocked clear polycarbonate translucent concentrating solar power (CSP) building material.