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.

Texas Capitol Mall Underground Parking Structure

Largo is currently working on the six level underground parking structure at the Texas State Capitol Complex in Austin. The 760,000gsf parking building is part of a massive overhaul of the Capitol Complex which aims at centralizing state agencies by providing grand civic spaces, an enhanced pedestrian experience, and connections to the surrounding community. The 984ft long building stretches three blocks from E Martin Luthor King Blvd. to 16th Street and will have a tree-lined pedestrian promenade on the top level. This first of three phases also includes two new office buildings whose underground parking levels tie into the Capitol Mall structure for a combined 4,400 stalls.

Largo is using Peri A frame 1 sided walls, Domino and Duo 2 sided walls and Bond 3 piece 8’ deck framing and pouring a 15,000SF deck every 3 days .  Four free standing placing booms are used to place concrete considering the tight logistics and access and three tower cranes are being used to move material around site with the largest capable of picking 19,000lbs. General contractor White Construction, Kirksey Architecture and Ensight Haynes Whaley structural engineer aim to have the 2,261 stall 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.

Gateway at Millbrae Tops Out along the new Harriet Tubman Way

Largo completed the Building 5A parking podium for the Gateway at Millbrae development earlier this month. The structure is seven levels above grade with retail space at street level followed by three levels of concrete parking decks and steel framed office space above. Republic Urban Properties is the developer on the transit-oriented project adjacent to the local rail station. The nine acre development includes 400 residential units, a quarter of which qualify as affordable housing with 80 units designated as veteran-preferred.

Largo used a Titan HV system for the 146,000sf of elevated deck. Segments of 34ft tall deck were shored with HV Mega Shores and HV 240 Frames. Largo is working with general contractors Blach and Cahill with Form 4, Inc. architects and DCI Engineers to have the project completed later this year.

The project is located north of Millbrae Avenue between Rollins Road and the recently renamed Harriet Tubman Way. Republic worked with the Bay Area Rapid Transit (BART) commission to rename the street in front of the station to honor the legacy of the iconic abolitionist. Republic is currently working with the NAACP of San Mateo to commission a permanent freestanding outdoor art piece to further commemorate the most well-known ‘conductor’ of the Underground Railroad.

(W)rapper’s Exoskeleton Taking Shape

At the corner of West Jefferson and National Blvd. Largo is pouring the concrete at the first building in southern California featuring an exoskeleton structural system with general contractor Matt Construction. The commercial building features two levels of below grade parking and 17 levels above for a total of 355,180gsf. While the decks in a typical structure are supported by internal columns, walls and beams, designers for the (W)rapper decided upon a system outbound of the decks to maximize leasable space and create one of the most unique looking buildings in the region. Eight steel bands act as the exterior columns and wrap around the building on the outside of the glass façade in an abstract design with no particular pattern.

Largo began work back in June 2019 with the placement of the 5,600CY mat foundation pour. A total of 560 readymix truck loads were delivered to the site starting at 11PM June 7 to six truck mounted boom pumps. Two of the pumps were at street level and four were driven down a temporary ramp into the pit two levels below grade. Two additional boom pumps were located at street level to receive loads and reduce traffic in the pit by pumping readymix down to the booms in the pit for final delivery. In total 134 individuals were involved in traffic control, delivery, pumping, placing and finishing of the foundation with the cement masons heading home at 6PM June 8.

Largo finished pouring the core late last year which is being constructed independently from the office decks. The core will house the elevators, restrooms and mechanical, electrical and plumbing shafts the while the metal decks will make up the office space. The core had to be constructed ahead of the tower to assist in the erection of the unique framing system. Designers Eric Owen Moss Architects and Arup structural engineers anticipate having the building complete during the forth quarter of 2021.

Rental Car Quick-Turn-Around Facility Tops Out at LAX

With 127 fueling stations, the Quick Turn Around (QTA) building at the new LAX Consolidated Rent-A-Car (ConRAC) facility will become the largest gas station in the world once open in 2023. The 1.1 million-square-foot building is four levels above grade and runs along La Cienega Boulevard north of Century Boulevard. The building is designed to house all maintenance and operations for seven major rental car companies at the third busiest airport in the world.

Instead of an internal ramping system, a “speed ramp” will be constructed on the west face of the building outbound of the main structure. The ramp will be used to transport cars between the QTA building and the Ready Return/Idle Storage structure to the west. This configuration is used to accommodate large volumes of vehicular ingress/egress and reduce traffic within the building.

Long truss deck tables were used to speed up the shoring process and ensure the schedule was met. The tables were 25-feet by 8-feet and required shoring on the two ends, which allowed a forklift to pass underneath the formwork. This eliminated most of the hand-set forming to reduce labor costs and enhance the speed of construction. Reshoring was done with 4,329 Peri MP 480 post shores. All column and wall forms were also pre-fabricated to enhance the schedule on the building with a 261-feet by 1,038-feet footprint.

Largo is working with general contractor PCL ConstructionPGAL architects and Englekirk structural engineers to have the concrete scope of work complete in early 2022. When complete, Largo will have poured over 51,000 cubic yards of concrete on the job.

St. Teresa of Calcutta Tops Out in San Diego

The St. Teresa’s of Calcutta affordable housing project topped out on the corner of 14th & Commercial in downtown San Diego this month. Largo worked with Level 10 Construction on the 15 level high-rise and three level podium development which holds a total of 407 units, 270 of which will be used specifically to address homelessness. The 18′ high ground level will house commercial and retail space with a fitness area, community room, management offices, and courtyard on the second level. The superstructure is made up of 17,563CY of concrete creating 328,514sf which was poured over the course of nine months.

Limited laydown area and the adjacent Covid-19 vaccination site added to the logistical challenges of the downtown environment. A Peri core-wall system which sat on embeds and did not rely on trailer panels for support was used to form the core. This allowed our crews to close the entire core the day before the deck was complete and pour both vertical and horizontal elements at the same time. During the typical levels our teams were able to pour an 18,000sf deck every week to meet the aggressive schedule.

Named in honor of Mother Teresa the development’s two main partners are the San Diego Housing Commission (SDHC) and Father Joe’s Villages, Chelsea Investment Corporation. The development will remain affordable for 55-years for San Diegans with low-income or who are experiencing homelessness. Designed by Joseph Wong Design Associates and BWE Structural Engineers, the development is scheduled to be open during the third quarter of 2021.

Prometheus Residential Podiums Top Out in the Bay Area

Two residential podium projects topped out in Mountain View, CA this month with the Prometheus Real Estate Development Group. The Tillery is located along Villa Street and The Hadley is two miles south along E. Evelyn Avenue., with both properties backing up to the Central Expressway.

The Tillery features two levels of below grade parking and a podium deck at street level for a total of 256,856gsf. The parking area holds 318 stalls and the four levels of wood frame above hold a total of 226 units. Largo is working with general contractor SBI Builders, BDE Architecture and Nelson Structural Engineers who plan to have the building open during the third quarter of 2021.

The Hadley Apartments for general contractor Palisade Builders have a similar configuration with two levels of below grade parking with a podium deck and wood framed residential above with a total of over 410,000sf. When complete the complex willhold 679 parking stalls and 471 residential units. The project is expected to be complete during the forth quarter of 2021 with BDE as lead architect and Nelson Structural Engineers.

Frost Center Tops Out at Cal Poly San Luis Obispo

Largo recently topped out at the Frost Center for Research and Innovation at Cal Poly San Luis Obispo. The project 102,000gsf building five levels above grade and will house the  Colleges of Science and Mathematics, Agriculture Food & Environmental Sciences and Liberal Arts. The building will house configurable classrooms and cutting-edge laboratory space dedicated to enhancing the university’s educational philosophy of “learn-by-doing.” The facility also includes a computer lab, three conference rooms and 43 faculty offices. The complex is designed to achieve LEED Gold® certification and incorporates measures to maximize passive cooling and heating, utilize natural ventilation in the faculty offices, consume 30% less potable water, and exceed current Title 24 standards by 20%.

The new building is located north of the Baker Science building between Poly View Dr. and Perimeter Rd. The façade features extensive masonry work taking cues from the adjacent science and liberal arts buildings. Interior vertical concrete was constructed using both shotcrete and cast-in-place methods wherein 2,000 cubic yards of self-consolidating concrete was used for all exposed columns and shear walls. From the first floor of the atrium brick, concrete and wood finishes are work together as the central design theme.

Working with general contractor Gilbane, ZGF Architects, LLP, and John A. Martin & Associates structural engineers, the building is scheduled to be open for the Fall 2021 semester.

APEX Tops Out in San Diego

Perched along Towne Centre Drive in San Diego, CA, the new APEX commercial office building has impressive views of Sorrento Valley to the east. Largo topped out with general contractor Rudolf & Sletten on the 345,000gsf structure which has been leased to Apple. Designed by Perkins & Will architects and Coffman Structural Engineers the building has two levels of below grade parking with five levels of above grade including the roof.

Designers attempted to integrate modern architecture with the surrounding biodiversity to enhance the user well-being. Exposed concrete walls blend with extensive glass and steel accents on the exterior façade. The concrete roof deck is also exposed and cantilevers toward the canyon sheltering the outdoor terrace on level four. There is a total of 37,000sf of exterior architectural concrete on the project which includes feature walls, columns, and sloped soffits. All exposed elements were designed with dimensioned seam plywood layout for a consistent special finish. A computer generated solar study was used to determine the most effective placement of sunshade elements to maximize daylight and visual connections to the environment.

Amenities include a fitness center, an outdoor workout area, volleyball court and game area with horseshoe and corn-hole space. A cafe, amphitheater and flexible workspaces round out the amenities and blend with the architectural features to produce a unique creative space. In total Largo pour over 27,000CY of concrete over the 10.5 month schedule.