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Colfax High School
Colfax, Calif.
Construction layout tool


The Colfax High School InvenTeam invented the "Tri-Metric," a mechanical trigonometric calculator that combines residential construction design and layout into a single process. The tool uses dynamic triangles to find angles and slopes which is then transferred to the work piece. It is under a square foot in size and has a simple user interface. In addition to residential construction, the "Tri-Metric" can be used for teaching trigonometry. The tool saves money by taking the key attributes of a saw guide, angled level, and a combination square and puts them into one useable tool. It can decrease layout time by 20%. It will be manufactured for under $20 per unit.