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

Ruth D. Adamson

When it opens in 2023, a new health care facility for MedStar Georgetown College Clinic in Washington, D.C., will attribute the most recent health-related and technological advances.

The new 477,213-sq.-foot health care and surgical creating will aspect 156 affected person rooms, 32 exam rooms and a rooftop helipad with immediate obtain to 31 working rooms. An intraoperative MRI program with a ceiling-mounted rail procedure connecting the diagnostic area and adjacent operating rooms will deliver the MRI magnet right to the individual. In addition, the undertaking features a 600-automobile, down below-quality parking garage, 18 elevators and 6 acres of new inexperienced area.

The web site is on the land of the previous Kober-Cogan Building, which was shut down in Could 2010 after the discovery of mildew in the creating and formerly had housed the hospital’s psychiatry office. 

That introduced unique difficulties for the challenge staff, led by Bethesda, Maryland-dependent Clark Development. Miles of water utility lines, a lot of of which have been not documented, have been jogging straight under the area of the new pavilion to feed both equally MedStar Georgetown University Healthcare facility and the Georgetown College campus structures. The job staff experienced to relocate these utilities exterior of the creating footprint to make it possible for the task to get started.

“The Clark group developed and engineered a 250-foot-long utility bridge to guidance chilled water and electrical providers from the central utility plant to the current MedStar Georgetown Clinic,” said Bradley Hunter, challenge government at Clark Development Group. “The bridge installation necessary near coordination with mechanical and electrical contractors who set up the utilities on prefabricated racks which have been then hung from metal beams measuring 60 feet, enabling excavation to begin down below.”

Clark designed a short-term utility bridge to aid active utilities for the current healthcare facility.

Permission granted by Clark Construction


Clark Building, alongside with architects HKS and Shalom Baranes Associates, assembled a BIM product of the current utilities. As style and design progressed and the basic structure and caisson areas ended up established, “we performed added borings at all caisson places and further more knowledgeable the BIM excavation design,” explained Hunter.

This initial stage allowed the Clark workforce to superior notify the charge product with regard to deep foundations and to start out revising the excavation program. With almost 1,000 piles to put in for aid throughout excavation, Clark recorded the genuine soil and utility conditions encountered in genuine-time with just about every pile and input the information into the BIM model. This significantly increased Clark’s comprehension of the site and allowed to proceed to revise and resequence the excavation program in advance of the subject crews, reported Hunter. 

“At the completion of pile set up, we were being ready to have a hugely extensive profile of the predicted excavation nicely in advance of the remaining phase of excavation,” said Hunter. “With this information, we have been ready to develop mitigation techniques in an exertion to minimize impacts to the important path of the job.”

Staff turns to technologies on website

Clark executed a preliminary survey with regular study devices, this kind of as the Leica MS50, which combines full station functionality, GNSS connectivity, digital imaging and 3D laser scanning in a solitary instrument. The 3D technology performed checks of slab edges, precast concrete, joints and ground flatness. The know-how also coordinates current properties to accomplish tie-ins with the façade.

Soon after finishing and placing survey handle factors all around the web site, the group began the scanning and layout method, claimed Kathleen Lavelle, challenge supervisor at Clark Design Group.

“For 3D laser scanning, we use our Leica MS50 yet again which has total scanning abilities. We use our study regulate points to tie the scanning data into web page coordinates. Following scanning is comprehensive, Leica’s Infinity plan is made use of to clean up up the scan,” reported Lavelle. “This can be exported to various file formats relying on the software currently being utilised to get the job done with the info.”

The survey crew utilized Leica MultiWorx, an include-on application to Autocad Civil 3D. This scan knowledge can be made use of to generate existing conditions and as-created drawings as desired.

Managing an influx of persons

Because of to its location adjacent to a college and health care centre, the Clark workforce experienced to consider of alternatives to handle the stream of students, sufferers and visitors, especially early in the COVID-19 pandemic to account for social distancing recommendations.

To do this, the design group built a non permanent pedestrian bridge to preserve access together the east aspect of the jobsite. On top of that, an on-site batch plant, making much more than 35,000 cubic yards of concrete, aided with visitors congestion by lessening the quantity of deliveries to the task website. The plant eliminated an approximated 3,500 vehicles off the road as well as making sure concrete high quality on web page, according to Lavelle.

Removing vehicles from the road also served minimize noise level, yet another challenge as the design site is in close proximity to various residential neighborhoods, reported Andree Yaap, task govt at Clark Development Team.

Clark also labored intently with the HKS and proprietor to consider which challenge factors could be created offsite. Applying a official scoring and evaluation course of action, the team selected things to prefabricate primarily based on what would present the most profit to the project, mentioned Yaap.

The venture incorporates additional than 700 prefabricated components, such as 156 lavatory pods, running space ceilings, affected individual headwalls, electrical rooms, scientific rooms, MEP skids and racks, and interior partitioning, said Yaap.

A line of individual lavatory pods ready to be set up.

Authorization granted by Clark Construction


Making aspects were being created throughout the state, with bathroom pods remaining built in Texas, operating area ceilings currently being constructed in Oregon, headwalls currently being designed in Oklahoma and wall panels staying developed in Virginia, claimed Yaap.

“Clark’s efforts have aided to expedite schedules and decrease charges,” said Yaap. “Other added benefits contain improved excellent resulting from assembly in a managed surroundings, the reduction of development action on web-site and a reduction in sound levels, neighborhood site visitors and congestion.”

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