Speed Ramp Construction at Mt. San Antonio College Parking Structure

After topping out on the four levels of parking decks, Largo is currently working on the external speed ramps of the Mt. San Antonio College Parking Structure. The 818 stall structure is located in Walnut, CA on the southwest corner of West Temple and Bonita Drive. The external speed ramp configuration is used to efficiently usher vehicles in and out of the structure in large quantities and enhance pedestrian safety by reducing traffic on the parking levels.

Teams used a Gradall to hoist steel frames, deck tables and Cunningham beam into place to form the ramp. Beams were assembled with a combination of 10ft and 6ft sections to accommodate the 28ft span between columns and the four 24in x 36in downturn beams were handset. 16ft long, 2in diameter tube bracing was clamped to the steel frames to secure them in place.

Another feature used to enhance pedestrian safety is the 11ft-2in cantilevered walkway on the north side of level three. This pedestrian footpath will eventually connect to a bridge which spans West Temple Ave. allowing users quick access to the main campus without having to cross the street at the intersection. The 24ft high walkway will reduce pedestrian traffic in and around the structure by allowing patrons safe passage to their vehicles.

General contractor Tilden Coil, executive architect HPI and parking architect and structural engineer Walker Consultants expect to have the structure complete during the summer of 2021.

Landmark II Tops Out in West Los Angeles

The Landmark II residential tower topped out this month along Wilshire Blvd. with general contractor Matt Construction. Looking south from Wilshire Blvd. the new building stands behind the Landmark II commercial office building between Granville and Stoner Avenues. The 35 level above grade structure holds 376 units with four levels of below grade parking for 421 cars.

The parking levels tie into an existing structure which had to remain operational throughout construction. Underpinning, or the process of strengthening the foundations of an existing structure, was part of seismic retrofit of the parking levels which was necessary to re-route traffic and create temporary access. Demolition of existing beams to connect the two parking structures included the de-tensioning of PT cables, and the installation of micropiles and an internally braced raker system.

The walls of the two cores are the primary lateral resisting system which were formed with EFCO Plate Girders to maximize the tie spacing. The elevator core formwork is supported by a self-climbing Power Tower PT-100 system. For the elevated decks Largo chose to use PERI perimeter tables with titan shoring for the handset portion of the decks. Gensler and Saiful Bouquet are the architect and structural engineer for the project which is scheduled to open during the Fall of 2021.

345 4th Street Tops Out

The eight level commercial office development on 345 4th Street topped out in San Francisco this month with GC Stoer Construction. The building will be occupied by WeWork, one of the leading space-as-a-service platforms providing flexible real estate options to businesses of all sizes. Designed by Stanton Architecture and DCI Engineers, the building provides 50,000sf of office space and retail storefront at street level. Located in the South of Market (SoMa) District, the downtown skyline will be visible to the north from the vegetated rooftop terrace.

By far the most striking feature of the building is the 77 ft. tall, 28 ft. wide board-formed concrete wall on the West elevation.

Illuminated inset numbers which bare the namesake of the building stand 9′ tall and run vertically down the wall with a smooth concrete finish. The wall was accomplished using shotcrete applied from the interior of the structure onto the boards and around the foam number inserts.

Yerba Buena Island Condominiums Top Out

Largo Concrete poured the last concrete deck at the Yerba Buena Island Condominiums this month. The project is perched on the small island in the San Francisco Bay best know for its tunnel connecting the two spans of the Bay Bridge. The development begins at the corner of Macalla and North Gate Roads on the northeast side of the island and works it’s way up the hill. The structure is 257,380gsf with 2.5 levels of below grade podium parking and five levels of light gauge metal stud above it. Largo worked with DCI Engineers to deliver the superstructure in a design-build format. Tenants will enjoy views of the self-anchored suspension eastern span of the Bay Bridge with Oakland and Emeryville in the background to the east, and Treasure Island to the north. General contractor Cahill Contractors are BDE Architecture aim to have the development open in early 2021.

Miro Towers Become the Tallest Buildings in San Jose

The Miro Towers became San Jose’s tallest structures this month when Largo poured level 29 at 291′ above street level! Located on the north side of E. Santa Clara Avenue between Fourth and Fifth, the buildings are across the street from City Hall which used to be the city’s second tallest structure. Miro will feature a total of 630 two and three bedroom units and 633 parking spaces.

Stressing Procedure

Transfer girders utilize four rows of post-tensioned cables which are progressively stressed throughout construction. The girders are located on level five above grade and are up to 72” wide by 64” deep! The additional rows of PT cables are spaced 6” apart and lay below a row of tendons which are stressed after placing level five. Upon completion of level ten the bottommost row is stressed, then the second from the bottom row is tensioned at level 15, ending at level 25.

Steinberg Hart Architects, DCI Structural Engineers, and general contractor Suffolk Construction are on schedule to have the Miro towers open early 2021.

4 Diller Tops Out Along El Camino Real in Redwood City, CA

Largo topped out at the 4 Diller project in Redwood City, CA this month! The 555,736gsf building is located in the heart of Silicon Valley and 35 of the 350 total units are designated as for affordable housing. The development has three levels of below grade parking which houses 441 private vehicles and 89 bikes. In addition to 2,900sf of retail space at street level the development features a fitness room, a club room and rooftop pool deck. General contractor and developer Greystar, Studio T Sqaure Architects and structural engineer Cary Kopczynski & Company aim to have the development open late 2020.

UCSD North Torrey Pines Living and Learning Center Buildings Three & Four

Largo recently topped out on the North Torrey Pines Living and Learning Center at the University of California, San Diego. The project was designed by HKS Architect, Inc. and Magnusson Klemencic Associates is located on the southeast corner of North Torrey Pines Rd. and Muir College Dr. in La Jolla, CA. Largo’s scope only covered a portion of the overall development with buildings Three and Four consisting of 15 and 14 levels respectively, for a total of 600,000gsf. The development features 2,000 new beds for undergraduate students with related residential life space, new facilities for the Sixth College, social sciences, arts and humanities, dining and retail space, and 1,200 parking stalls. General contractor Clark Construction is aiming to have the development open for the Fall 2020 semester with a LEED Platium rating.

1066 Market Topping Out

Largo topped-out at the 1066 Market street high-rise this week in downtown San Francisco. The building features two levels of below grade parking with 97 total stalls and 4,000sf of retail at grade level. 303 high-end residential units span the following 15 levels above grade. Largo is working with general contractor Swinerton Builders, architect Solomon Cordwell Buenz & Assoc. and structural engineer Nishkian Menninger to have the building open in early 2020.

Park 5th Tops Out

Across the street from Pershing Square, Largo topped out at the Park 5th development in downtown Los Angeles this week. The building rests on a 4,700CY mat foundation which was poured in August 2017, with two levels below grade and 25 levels above. Patrons of the 347 unit high-rise will enjoy a rooftop deck with a club room, fitness center, a bar/kitchen, TVs, a business center, and an infinity pool with cabanas. Designed by architect Ankrom Moisan and Nabih Youssef & Associates structural engineers, the buildings is seeking LEED Silver certification by the USGBC. Working with general contractor Suffolk Construction the building is scheduled to be open in the first quarter of 2019.

437 S. Hill Podium

The MacFarlane Partners are also developing the site adjacent to the high-rise into a new mid-rise apartment complex. Largo worked with Bernards on this project pouring the concrete in a 5 level parking podium with wood frame above.

Cal Poly Pomona Student Services Building Tops Out

Cal Poly Pomona Student Services Building recently topped out with the last of 17 shotcrete applications on the roof. The two low-rise structures are four and three levels above grade totaling 138,400gsf. The buildings will house offices for the university’s administrative staff, multi-purpose meeting and test-taking spaces, financial support, cashier,  finance, registration and information technology. The most unique aspect of the project is the ‘wavy’ roof which undulates with large perforated overhangs covering both buildings. The roof is designed to mimic the hills which surround the campus and reduce thermal loads and glare while maximizing daylight into the structure. Working with general contractor CW Driver, CO Architects, and John A. Martin & Associates Structural Engineers, the building is seeking a LEED Silver Certification and is expected to open during the Fall of 2018.