EXECUTIVE SUMMARY
A wind tunnel study of the 651 Gateway rennovation, located in South San Francisco, California was conducted to assess pedestrian wind comfort and safety.
Measurements of wind speeds in pedestrian locations of interest were combined with wind statistics and compared to the acceptability criteria of Lawson (See description of pedestrian wind criteria). Analyses were performed on both an annual (average over all seasons) and a seasonal basis to identify wind conditions that may be important for seasonal use of certain areas.
Four configurations, with various wind mitigation elements, were tested. The test results reported here represent the worst wind conditions around the project site for each of the configurations.
The overall wind conditions around the project site were observed to be suitable for the intended use in most locations.
Not all of the test locations passed the distress criterion.
SUMMARY OF TEST PARAMETERS
Model scale 1:240
Surrounding model radius (full-scale) 1360 ft
Number of points 22
TEST CONFIGURATIONS
Configuration B: The project site with no landscape elements (Base case)
Configuration F: The project site with 6' landscape feature walls, a 20' wall on the NW corner of 611 Gateway, and two 6' feature falls at the entrance to 681 Gateway
Configuration G: The project site with all config F features and two additional 10' porous windscreens at the breezeway between 651 and 611 Gateway
Configuration H: The project site with all config F and G features with additional trees concentrated on the south side of the plaza