Clark Construction employs 3D modeling, laser scanning to solve healthcare project challenges

Kennith Bogan

When it opens in 2023, a new healthcare facility for MedStar Georgetown College Healthcare facility in Washington, D.C., will feature the newest health-related and technological advancements.

The new 477,213-sq.-foot clinical and surgical building will characteristic 156 affected individual rooms, 32 test rooms and a rooftop helipad with immediate access to 31 working rooms. An intraoperative MRI procedure with a ceiling-mounted rail procedure connecting the diagnostic space and adjacent running rooms will provide the MRI magnet straight to the patient. In addition, the challenge involves a 600-auto, under-quality parking garage, 18 elevators and 6 acres of new green house.

The website is on the land of the previous Kober-Cogan Developing, which was shut down in Could 2010 immediately after the discovery of mold in the making and beforehand experienced housed the hospital’s psychiatry division. 

That presented unique worries for the venture staff, led by Bethesda, Maryland-centered Clark Building. Miles of drinking water utility traces, a lot of of which have been not documented, have been running instantly beneath the locale of the new pavilion to feed the two MedStar Georgetown College Clinic and the Georgetown University campus buildings. The job team experienced to relocate these utilities exterior of the creating footprint to allow for the job to start.

“The Clark crew made and engineered a 250-foot-lengthy utility bridge to guidance chilled h2o and electrical expert services from the central utility plant to the existing MedStar Georgetown Clinic,” said Bradley Hunter, task government at Clark Construction Group. “The bridge set up essential near coordination with mechanical and electrical contractors who mounted the utilities on prefabricated racks which had been then hung from steel beams measuring 60 ft, enabling excavation to start off underneath.”

Clark made a momentary utility bridge to guidance energetic utilities for the existing hospital.

Authorization granted by Clark Development


Clark Design, alongside with architects HKS and Shalom Baranes Associates, assembled a BIM product of the present utilities. As design progressed and the simple composition and caisson areas were being set, “we done added borings at all caisson spots and further more educated the BIM excavation design,” said Hunter.

This original step allowed the Clark team to better advise the charge model with respect to deep foundations and to commence revising the excavation plan. With nearly 1,000 piles to set up for aid through excavation, Clark recorded the actual soil and utility problems encountered in serious-time with every pile and input the information and facts into the BIM product. This significantly increased Clark’s knowing of the web page and authorized to go on to revise and resequence the excavation program in progress of the industry crews, reported Hunter. 

“At the completion of pile set up, we were being able to have a extremely comprehensive profile of the predicted excavation very well in advance of the last period of excavation,” said Hunter. “With this information, we have been ready to create mitigation approaches in an exertion to reduce impacts to the essential route of the challenge.”

Crew turns to know-how on internet site

Clark performed a preliminary survey with common survey instruments, these kinds of as the Leica MS50, which brings together overall station operation, GNSS connectivity, digital imaging and 3D laser scanning in a solitary instrument. The 3D engineering executed checks of slab edges, precast concrete, joints and ground flatness. The technological know-how also coordinates current structures to carry out tie-ins with the façade.

Immediately after finishing and setting study regulate factors around the website, the staff started the scanning and format course of action, claimed Kathleen Lavelle, challenge supervisor at Clark Construction Team.

“For 3D laser scanning, we use our Leica MS50 once more which has whole scanning capabilities. We use our study management points to tie the scanning information into website coordinates. Immediately after scanning is comprehensive, Leica’s Infinity plan is utilised to thoroughly clean up the scan,” reported Lavelle. “This can be exported to distinctive file formats dependent on the program remaining applied to get the job done with the knowledge.”

The study group applied Leica MultiWorx, an include-on application to Autocad Civil 3D. This scan details can be applied to generate existing ailments and as-developed drawings as required.

Running an inflow of men and women

Thanks to its spot adjacent to a college and health care middle, the Clark team had to think of alternatives to handle the stream of students, people and people, especially early in the COVID-19 pandemic to account for social distancing suggestions.

To do this, the development workforce developed a non permanent pedestrian bridge to keep access along the east aspect of the jobsite. Additionally, an on-internet site batch plant, developing extra than 35,000 cubic yards of concrete, served with targeted traffic congestion by cutting down the selection of deliveries to the undertaking web site. The plant eliminated an estimated 3,500 vehicles off the road as nicely as ensuring concrete high quality on website, according to Lavelle.

Eradicating vehicles from the road also aided cut down noise level, another problem as the building web page is in close proximity to several residential neighborhoods, stated Andree Yaap, undertaking executive at Clark Building Team.

Clark also labored closely with the HKS and owner to assess which project things could be created offsite. Applying a official scoring and evaluation procedure, the staff picked factors to prefabricate dependent on what would deliver the most reward to the undertaking, claimed Yaap.

The job includes far more than 700 prefabricated products, which includes 156 lavatory pods, working space ceilings, affected individual headwalls, electrical rooms, medical rooms, MEP skids and racks, and inside partitioning, mentioned Yaap.

A line of affected person bathroom pods ready to be installed.

Authorization granted by Clark Building


Making elements had been made across the region, with toilet pods getting crafted in Texas, operating place ceilings being built in Oregon, headwalls currently being designed in Oklahoma and wall panels currently being created in Virginia, stated Yaap.

“Clark’s endeavours have helped to expedite schedules and lower expenses,” said Yaap. “Other advantages include increased high quality ensuing from assembly in a managed surroundings, the reduction of design activity on internet site and a reduction in sounds degrees, neighborhood website traffic and congestion.”

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