The present invention relates to decorative and structural blocks designed to be installed as skirting structures for buildings, elevated structures and structural elements such as posts. More particularly, the present invention relates to a system that uses specifically designed and manufactured masonry blocks that are used in conjunction with specifically designed support beams and/or brackets to provide durable, attractive, easy to assemble surfaces or skirting structures. The blocks are shaped to be stacked in vertically independent, self-supporting columns, strengthened and linked together by specially shaped, lightweight, lateral support beams positioned between adjacent columns, and which may be attached directly or indirectly to a sub-structure.