Designers of the Westin Hotel in Boston's Copley Place had to balance the desire of the owners for quick completion with requirements of the City of Boston for compatibility with the neighboring historic masonry structures. They chose a reinforced concrete framing system, and after exploring a number of exterior cladding materials chose architectural precast concrete because it provided the necessary aesthetic fit at an attractive price. Then the form supplier and contractor devised a construction sequence that used the precast panels as integral forms to speed erection. The low-rise base and hotel tower are shaped in plan view like truncated triangles to best fit the triangular site. By slipforming the triangular tower core, framing the low-rise base conventionally and using flying form tables in constructing the tower, the contractor was able to top off the 36-story hotel in just 14 months.