City of Los Angeles, Methane Zone Level II
52 Story High Rise
3 Levels Below Grade
120,000 sq ft footprint
Terra-Petra specified an alternate approved membrane system, which reduced the installation time by approximately 50%. Additionally through modifications, we were able to get approval from the Los Angeles Department of Building and Safety (LADBS) to eliminate nearly 40% of the vent piping, over half of the vertical vent riser pipe and we were able to implement reductions in the methane barrier membrane installation. Because we were able to reduce installation time, the owner was able to open their building on schedule amidst much fan fare, and amidst a significantly lower construction cost.