Twisted solids

·	*Principle* The technique of twisted solids was developed to build quickly helical round handrails for metallic or concrete stairs, we also use the technique today for handrails on modern style wooden stairs. This technique breaks up the helical curve into smaller elliptical parts that can be machined flat on traditional woodworking machinery. The parts are then assembled with a twist between each piece to build the final handrail. We use a CAD program to calculate the elipse and the angles for the joints and twists.
·	*Advantages* This method gives a very precise control over the position of the helical curve. The handrail can be built quickly with traditional woodworking machinery. The handrail can be shipped in smaller pieces that are assembled on site.
·	*Technical Limits* This technique is only applicable to building round handrails, for rectangular or moulded handrail we use twisted laminate technology.
·	*Applications* Building handrails for staircases in wood, metal, stone or concrete.