Largest Column-Free Space in North America Pours Out at the Las Vegas Convention Center

Largo recently poured-out at the Las Vegas Convention Center (LVCC) Phase 2 Expansion project which features 328,000sf of column-free exhibit space. The 1.44m gsf addition includes a total of 600,000sf of exhibit space, 210,000sf of pre-function areas and 150,000sf of meeting and multi-purpose space. 195,000sf of support areas include MEP facilities, restrooms, public corridors, and a central utility plant. 280,000sf of service space includes loading docks, kitchens, food and beverage outlets, security stations, and office space for admin, maintenance and operations staff.

Largo placed over 70,000CY of concrete across 970,000sf of slab-on-grade, 243,000sf of suspended decks and beams and 414,000sf of slab on metal deck. Largo placed concrete on 296 different days averaging 235CY per pour! The majority of the 585,000sf Exhibit Hall Floor was placed in 88 working days, which averages out to placing 6,600sf every day for four months! General contractor Martin Harris/Turner Construction, JV, TVS Nevada Architects and Magnusson Klemencic Associates structural engineers, the development is scheduled to be complete in December 2020.

UCLA Margo Leavin Art Studio Wins Charles Pankow Award

Largo Concrete worked with Abbott Construction on the UCLA Warner Graduate Art Studio Project in Culver City, CA.

The overall project consisted of a 21,200sf renovation of the Graduate Art Studios existing building and a 26,800sf, L-shaped addition to the facility. Design by architecture firm Johnston Marklee, the building is organized in the fashion of a ‘community’ with small blocks of private studios in a cul-de-sac setting adjacent to communal, plaza like facilities connected by pathways akin to city streets. Specialized lab space for woodworking and ceramics are also included in the facility which is designed to be adaptable to accommodate future new technologies and working methods. The Margo Leavin Art Studio project anticipates a LEED Gold Certification.

The construction of this building utilized several different concrete assemblies to support the building and achieve the natural concrete look. This was especially important to designers and the University to integrate the facility into the former industrial zone know as the Hayden Tract. The exterior walls were designed as concrete tilt-up panels with 2′-0″ “pillows” or half-circles on the exterior face. Special single-use form liners were designed and fabricated out of state to achieve the “pillow” shapes. Cast-in-place stitch columns were used to connect the tilt panels at each grid line. The stitch columns also used the “pillow-shaped” form liner but were exceptionally challenging because they were poured full-height (28′-10″) between the panels and had to line up perfectly with no gaps or visible seams. Largo Concrete’s in-house engineering team designed custom falsework to support lintel panels which would eventually be suspended 15’-0” in the air. These panels also feature the “pillowed” exterior finish and are unsupported from below as they span the openings to the building.

The interior frame of the building consists of cast-in-place walls, columns and ring beams: all exposed with an “as-cast” finish. Shotcrete walls and beams were installed against the existing building walls on two sides to connect the new construction to the existing building. As was the case with the exterior finish, no sacking or other cosmetic enhancements were allowed on the interior as well. The buildings roof is designed as a grid of vaults with curved glulam beams covered by roofing membrane, curved polycarbonate or nothing at all to allow for natural ventilation in certain spaces.

Limited access to the building pad because of the existing structure made it difficult to form, place and hoist the tilt-up panels. The time frame to complete all of the building concrete was 8 months. Despite these challenges the concrete scope of work was completed in eight months with zero safety incidents over 29,213 hours. Some of the potential hazards that were endured included 30’-0” shotcrete walls and beams, 30’-0” shear walls and columns, 30’-0” tilt-up panels and hoisting the panels with a high voltage wire running along one side of the jobsite.

A special thanks to all those involved in this great project:
Owner: University of California, Los Angeles
General Contractor: Abbott Construction
Architect: Johnston Marklee
Structural Engineer: Simpson, Gumpertz & Heger
Readymix Supplier: Cemex

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.

Working on the foundations at the 225 California Commercial Building

With the rat slab complete, the protection slab, waterproofing and the mat foundation will follow shortly at the 225 California commercial building in Burlingame, CA. The building has a structural concrete frame and features 3 levels of below grade parking with 130 stalls and 5 levels of retail and commercial space above. Working with general contractor Lusardi Construction and designers MBH Architects and ZFA Structural Engineers, Largo expects to be topped out during the summer of 2017.