200 Mission St. | San Francisco, CA

200 Mission St. | San Francisco, CA
Completion Date: 2025

Project Overview

The 200 Mission St. Tower is part of the Atlas Block development replacing the Pacific Gas & Electric Building that previously occupied the space. The tower is the 33^rd tallest structure in the Bay Area with a rooftop height of 492 ft. This renovation project has modernized the area with high-performance cladding, seismic improvements, and a LEED Platinum certification. At the pedestrian level, the downtown commercial district complex is home to landscaped courtyards, performance space, and a 5,000 square foot “Wintergarden.”

Why CPP

This project included an entire redevelopment of the cladding on the building which changed the shape of the building significantly to include new curvatures. Since the new design of the cladding is no longer rectangular, an accurate assessment of the wind pressures was required to ensure efficiency and reliability. CPP built a model to test the new cladding and façade and determine the peak pressures based on a nominal 1700-year return period.

CPP also conducted a pedestrian wind study to predict, assess and where necessary reduce adverse effects of wind caused by the design changes from the 200 Mission St. project. The study was conducted in accordance with the San Francisco City Planning Code and the American Society of Civil Engineers (ASCE) Standards. CPP tested developments and terrain in a 2,000 ft. radius of the new development site and found some areas where additional landscaping to reduce wind speeds would add to the overall comfort of the project site. Specifically, CPP was able to recommend cumulative developments to the south through west of the site to shelter pedestrians from the winds that were expected to increase because of the renovations from the project.