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The Conco Companies are providing concrete services for a new office building in downtown San Francisco located at 350 Bush Street. The new 20-story high-rise will have 18 floors of office space, one lobby level, and a roof terrace as well as a two-level subgrade parking structure. In addition as the office tower will incorporate the San Francisco Mining Exchange, a historic landmark, as its primary entrance, the project also includes the “Historic Renovation of San Francisco Mining Exchange Building.”

The client on the project is the Lincoln Property Company and Hathaway Dinwiddie is serving as the general contractor. The project was designed by the architectural firm of Heller Manus Architects and integrates the terra cotta façade and the columns of the landmark building with the office tower. The plan calls for a grand lobby in the historic exchange hall as well as a galleria at the street level. Once complete, the project will include 469,000 square feet of new and renovated space and will be a balance of antique and modern. The building is seeking LEED Platinum certification and will feature a number of environmentally advanced technologies.

The Mining Exchange building was constructed in 1923 and for a short time was used as the Stock Exchange. It was designed by Miller & Pflueger, an architectural firm that designed a number of significant S.F. buildings of the time and closely resembles the New York Stock Exchange that had been constructed twenty years earlier.

Through the years, the building was used for the San Francisco Curb Exchange from 1928-1938, the San Francisco Chamber of Commerce from 1938-1967, and finally the Western Title Insurance from 1967-1979. It has sat empty since 1979.

Conco’s mission is to be the best supplier of concrete services in the Western United States and to bring experience, expertise and quality to each project. We continue to upgrade and expand facilities to better serve the growing market for public works projects, commercial, educational, parking structures, and other construction development.

Conco Companies CPMC:Sutter Van Ness Medical Office Building

The Conco Companies, along with Charles Pankow Builders, Ltd. were awarded the contract for the 250,000 square-foot Van Ness Medical Office Building currently under development. The project was designed by Boulder Associates architectural firm and is targeting LEED Silver certification. Construction on the project began in 2015 and the building is expected to open in late 2018.

Located on the California Pacific Medical Center (CPMC) Cathedral Hill campus, the $168 million project will consist of nine stories above grade, street level retail and six levels of below-grade parking for 383 cars. The project’s design elements include four green roof gardens that will provide the Van Ness Medical building with 25,000 square feet of green space. During the course of the project Conco will use approximately 4,500,000 lbs. of reinforcing steel.

Using a Lean Construction delivery process, Conco, in conjunction with Pankow, is utilizing 3D BIM (Building Information Modeling) programs to improve efficiency by coordinating all design disciplines and minimizing constructability issues. The project is 100 % modeled in our state of the art Tekla 3D Model program. This is the first of three projects from the Office of Statewide Health Planning and Development (OSHPD) to utilize a Lean Construction delivery process.

Once the building opens, it will house physician offices and ambulatory medical care. Although already half of the center is pre-leased by CPMC and Sutter Pacific Medical Foundation, there will also be space available for private physicians. Furthermore, to ensure convenient access to the new 700,000-square-foot acute-care hospital under construction across the street, a pedestrian tunnel is planned for underneath Van Ness Avenue.

The Conco Companies is one of the leading concrete contractors in the Western U.S. and offer a wide range of quality services and products. Our experience includes providing services for commercial, educational, parking and other construction development as well as public works projects. We serve California, Washington State, Oregon, Colorado and Nevada.

Conco Companies CPMC:Sutter Van Ness Medical Office Building

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CPMC/Van Ness Medical Office Building Update April 2017 - The Conco Companies

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Van Ness Medical Office Building Update April 2017 - The Conco Companies 4

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Van Ness Medical Office Building Update April 2017 - The Conco Companies 2

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The Conco Companies were awarded the concrete contract for a high-end condominium project that is currently under construction in the heart of Pacific Heights in San Francisco. The LuXe is a 34-unit condominium that is being developed by Belrich Partners, LLC and led by the marketing firm of Pillar Capital. Forum Design, an award-winning architectural firm, designed the building with a clean, but warm, modern aesthetic. The general contractor is Centrix Builders and Dolman Consulting Engineers is the structural engineer. The project broke ground in March, 2014 and is scheduled to be finished by the end of 2015.

Just recently the Topping-Off Ceremony was held on March 20th for the 7-story, 73 foot tall building. Conco’s responsibilities on the project are to provide all of the concrete pumping and reinforcement services for the project. In addition we are constructing two subterranean floors that will contain 49 parking spaces for the condo’s residents.

The LuXe will feature elegant, large floor-to-ceiling windows and spectacular views of the city and the surrounding bay. The luxury condominiums’ interiors will be filled with amenities such as wood paneling and designer finishes. Sales for the units will begin sometime this Spring.

The new condominiums are just a small start to help improve San Francisco’s housing shortage. A recent Zillow report shows that the city has granted only 193 new housing units permits for every new 1,000 residents. Paragon Real Estate also indicates much the same thing in their report. It shows San Francisco has had a population growth of more than 45,000 residents since 2010 but has only built 7,500 new housing units.

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1650 Broadway The LuXe Condominiums Conco Companies

The Conco Companies mission is to be the best supplier of concrete services in the Western United States and to bring expertise and unsurpassed quality to each project. We continue to upgrade and expand facilities to better serve the growing market for public works projects, commercial, parking structures, educational, and other construction development.

Most large scale construction projects in downtown settings lack the room necessary to stockpile large quantities of equipment or materials needed to get the job done. This makes the utilization of the space that does exist vital in the planning of every job task. This is certainly the case with 1 South Market, a new high-rise residential tower being built in downtown San Jose.

One of the tasks that Conco had to undertake on this project was to backfill 2,900 tons of crushed rock in three 8-hour days. With the congestion of a busy worksite, there was no margin for error as delays in placing the material would impact many other job tasks.

In order to deliver the crushed rock within these constraints, Conco brought in its Direct Feed trailer which allows a Superdump, Transfer, End Dump or 10-Wheeler to unload its contents directly into the hopper attached to the trailer. Material is then fed from the hopper onto one of Conco’s Telebelts. The Telebelt then places the material directly to the point of placement. With this system, there is no need to stockpile material on the jobsite and handle it twice via a loader or bobcat. It is also quicker and less labor intensive than using a loader, as the material is discharged directly from the back of a truck.

After the highly publicized reports from this past summer regarding the failure of 32 anchor rods on the eastern span of the new Bay Bridge, the highly regarded concrete contractor, Conco was retained by the general contractor, American Bridge/Fluor Enterprises, Inc. JV, to assist with the repair work. Based on their earlier performance with other critical and technically challenging components of the new bridge structure, Conco was the logical choice. “Every aspect of this project had complex technical challenges.” said Brian Petersen, the contractor’s Project Director, and “Conco’s skill and expertise was a great asset to our team.”

The defective anchor rods were supposed to secure the bridge deck to the concrete crossbeam support. Since the failed rods were embedded and inaccessible, replacement was not feasible. After extensive collaboration and analysis, a fix was designed. It involved a complex series of steel saddles and post-tensioned (PT) jacket walls that would provide the required clamping force to secure the bridge deck framing to the E2 crossbeam. Temporary steel shims were inserted into the stabilizers while the repairs were being done, and in order for the Labor Day opening to go forward as planned. “The SAS bridge is part of a world-class megaproject which features a large amount of challenging concrete work associated with temporary support structures that are not part of the completed bridge,” noted Jim Klinger, Conco’s project manager.

For this very complicated problem, Conco’s first task was to close in a steel-framed trestle platform to give work crews access to the site and eliminate the potential for materials to fall into the San Francisco Bay. Once the platform was complete, crews roughened the crossbeam surface and epoxied over 3,000 drilled dowels into place. Reinforcing steel and PT cable ducts were then installed by Harris Salinas. Conco crews followed behind them, placing custom-made PT trumpet blockouts and setting forms for the jacket walls.

The concrete jacket wall structures were placed in three pours totaling 380 cubic yards. Due to restricted access and rebar congestion, much of the concrete had to be pumped 250 feet and then injected into the forms through ports at strategic locations. Conco worked closely with concrete supplier, Central Concrete, to develop an injectable SCC mix with silica fume that would meet the project’s specifications. A full-scale mockup was constructed and successfully tested to ensure the long-distance pumping and injection of the highly-flowable SCC mix would work.

“Almost all of the concrete work items Conco was asked to perform by ABFJV were custom, one-of-a-kind scopes that we will probably never see again,” said Klinger. In late November, the third and final injection was finished and the repairs were completed successfully.

Conco is a leading supplier of concrete services for the Western United States. As one of the leading commercial concrete contractors in the Bay Area, we have been involved with large-scale projects in the area including the new 49ers Stadium. Our concrete services include commercial, educational, parking and other construction development as well as public works projects and highways.