Saiful Bouquet provided full structural engineering services for the Landmark Los Angeles, a new 34-story, 415,000 sf concrete tower that features 376 units built over 4 levels of subterranean parking. The new glass-and-steel structure rises 349 feet in height with floor-to-ceiling windows and includes a Jr. Olympic size pool and amenity deck, as well as a new landscaped park made possibly by repurposing the surface parking lot on top of the subterranean parking. Designed with features inspired by a forest, the new 40,000 sf green space is privately maintained and offers a meadow and children’s play fountain, seating areas, paved walkways, and a grassy lawn to enjoy outdoor concerts and performances.

The Landmark tower threads an existing 1980’s full city block development. The existing development included 3 to 4 levels of post-tensioned subterranean parking covering the entire site with a 16-story steel office tower and a 2-story steel supermarket rising from the podium. The new tower, which replaced the existing 2-story market, was built right through the existing post-tensioned long-span subterranean parking structure.

In addition to the new tower, the project design also involved evaluating the entire development as one structure with both new and existing towers rising from the common podium, strengthening the subterranean parking where required, and strengthening the long-span PT deck/girders supporting the landscaped park. The new tower consists of concrete construction with core walls as the lateral resisting system and post-tensioned slabs. The seismic design of the tower followed a Performance Based Design approach.

Landmark Los Angeles is the first residential high-rise to be built west of the 405 Freeway in more than 40 years. Threading a new tower through an existing long-span post-tensioned subterranean garage is extremely complicated by itself but when combined with the other project constraints, it truly needed every bit of design creativity and teamwork to successfully pull it off!

 

Awards

2022 Award of Merit: New Construction Category – Structural Engineers Association of Southern California (SEAOSC)