This sub-series consists of 87 items showing the design and construction of the 1980 addition to St. Hilda's College. Drawings made in winter and spring 1980 are marked "OBSOLETE" due to the fact that they were not drawn in metric scale. Drawing #3A is annotated, "Everything in metric is smaller and costs more - PMK", and "Watch it, its metric". Some of the drawings are labelled in error, "Project No. 715". The structural drawings have been signed by S.M. Wolczyk, RPE, Carruthers & Wallace Ltd, Consulting Structural Engineers, Rexdale. The electrical plans were drawn by T.A. Harshaw, and the mechanical plans by L.M. Bennett both of D.E. McGregor and Associates Ltd, Scarborough. Scope Mechanical Contracting Ltd, Markham, provided a set of "as built" mechanical drawings.