Hold it!

摘要

The Norris Canyon Estates in San Ramon, Calif., east of San Francisco, are gaining a local presence not merely for luxury homes but also for the nearly 46,000m2 of multiple-tiered retaining walls built throughout its challenging terrain. A location with 1:1 slope ratios and expansive clay soils required a major transformation to make the area suitable for development. A local jurisdiction stating that walls on the project could not be taller than 1.5m. further complicated matters.