A templating device for preparing beams includes a rod that has opposed ends, each of which is both slidably engageable and fixedly engageable to a first segment of a respective protractor of a pair of protractors, such that the first segment extends linearly from the rod. The first segment is pivotally engaged to a second segment, which is selectively fixably positionable relative to the first segment. The rod and the first segments are positioned between a pair of surfaces, with each second segment positioned flush to a respective surface. A user fixes the second segment relative to the first segment to provide a respective angle measurement and a length measurement between the surfaces, and then templates these measurements onto a beam. The user then can cut the beam to length, with the ends of the beam angled so that the beam fits between the pair of surfaces.