May 17, 2022


Anything but ordinary

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

When it opens in 2023, a new healthcare facility for MedStar Georgetown University Hospital in Washington, D.C., will aspect the most up-to-date healthcare and technological improvements.

The new 477,213-sq.-foot health-related and surgical constructing will feature 156 affected individual rooms, 32 examination rooms and a rooftop helipad with direct accessibility to 31 working rooms. An intraoperative MRI procedure with a ceiling-mounted rail technique connecting the diagnostic room and adjacent running rooms will carry the MRI magnet specifically to the client. In addition, the job involves a 600-auto, under-grade parking garage, 18 elevators and 6 acres of new inexperienced place.

The web-site is on the land of the former Kober-Cogan Making, which was shut down in May perhaps 2010 just after the discovery of mould in the building and previously experienced housed the hospital’s psychiatry department. 

That offered special troubles for the task workforce, led by Bethesda, Maryland-based Clark Construction. Miles of drinking water utility traces, numerous of which ended up not documented, have been managing instantly under the place of the new pavilion to feed equally MedStar Georgetown College Healthcare facility and the Georgetown College campus structures. The job team experienced to relocate these utilities exterior of the creating footprint to let the undertaking to begin.

“The Clark staff made and engineered a 250-foot-extensive utility bridge to support chilled drinking water and electrical companies from the central utility plant to the existing MedStar Georgetown Clinic,” said Bradley Hunter, challenge executive at Clark Construction Group. “The bridge installation required close coordination with mechanical and electrical contractors who installed the utilities on prefabricated racks which ended up then hung from steel beams measuring 60 toes, letting excavation to get started down below.”

Clark built a short term utility bridge to aid energetic utilities for the existing hospital.

Permission granted by Clark Development


Clark Development, along with architects HKS and Shalom Baranes Associates, assembled a BIM product of the present utilities. As style and design progressed and the simple composition and caisson areas were established, “we done further borings at all caisson destinations and further more informed the BIM excavation model,” mentioned Hunter.

This preliminary action allowed the Clark team to improved tell the price model with regard to deep foundations and to start revising the excavation program. With nearly 1,000 piles to install for assist throughout excavation, Clark recorded the precise soil and utility ailments encountered in genuine-time with each individual pile and enter the information and facts into the BIM model. This considerably improved Clark’s comprehending of the internet site and authorized to go on to revise and resequence the excavation program in advance of the subject crews, mentioned Hunter. 

“At the completion of pile installation, we ended up able to have a really complete profile of the envisioned excavation effectively in progress of the final period of excavation,” said Hunter. “With this details, we have been in a position to produce mitigation methods in an effort to minimize impacts to the critical path of the venture.”

Workforce turns to engineering on web site

Clark executed a preliminary study with common study devices, such as the Leica MS50, which combines whole station performance, GNSS connectivity, digital imaging and 3D laser scanning in a one instrument. The 3D technology carried out checks of slab edges, precast concrete, joints and ground flatness. The know-how also coordinates current properties to conduct tie-ins with the façade.

Immediately after finishing and setting survey manage factors around the website, the team began the scanning and format approach, said Kathleen Lavelle, task supervisor at Clark Building Group.

“For 3D laser scanning, we use our Leica MS50 again which has full scanning abilities. We use our survey control points to tie the scanning facts into website coordinates. Right after scanning is full, Leica’s Infinity plan is applied to thoroughly clean up the scan,” reported Lavelle. “This can be exported to various file formats based on the software program getting used to do the job with the details.”

The survey staff made use of Leica MultiWorx, an increase-on application to Autocad Civil 3D. This scan details can be utilised to create existing ailments and as-constructed drawings as required.

Managing an influx of men and women

Owing to its area adjacent to a university and health care center, the Clark crew experienced to believe of methods to deal with the stream of learners, individuals and people, specially early in the COVID-19 pandemic to account for social distancing rules.

To do this, the construction crew designed a temporary pedestrian bridge to maintain entry together the east side of the jobsite. Furthermore, an on-web page batch plant, generating far more than 35,000 cubic yards of concrete, served with targeted traffic congestion by cutting down the quantity of deliveries to the undertaking web site. The plant taken out an believed 3,500 vans off the highway as effectively as ensuring concrete quality on site, according to Lavelle.

Taking away vehicles from the road also helped lower sounds degree, an additional problem as the development website is in close proximity to numerous household neighborhoods, said Andree Yaap, task govt at Clark Design Group.

Clark also worked closely with the HKS and proprietor to evaluate which task components could be produced offsite. Working with a formal scoring and evaluation course of action, the team selected features to prefabricate centered on what would give the most reward to the undertaking, stated Yaap.

The challenge consists of a lot more than 700 prefabricated resources, which includes 156 bathroom pods, working space ceilings, affected person headwalls, electrical rooms, scientific rooms, MEP skids and racks, and inside partitioning, said Yaap.

A line of affected individual lavatory pods prepared to be installed.

Authorization granted by Clark Building


Setting up elements ended up made throughout the nation, with lavatory pods becoming constructed in Texas, running space ceilings staying developed in Oregon, headwalls getting constructed in Oklahoma and wall panels being created in Virginia, claimed Yaap.

“Clark’s efforts have aided to expedite schedules and lessen costs,” said Yaap. “Other rewards involve enhanced high-quality resulting from assembly in a controlled natural environment, the reduction of building activity on site and a reduction in sounds ranges, neighborhood website traffic and congestion.”