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

When it opens in 2023, a new health care facility for MedStar Georgetown College Hospital in Washington, D.C., will aspect the latest medical and technological developments.

The new 477,213-square-foot medical and surgical creating will attribute 156 affected person rooms, 32 examination rooms and a rooftop helipad with immediate accessibility to 31 functioning rooms. An intraoperative MRI technique with a ceiling-mounted rail technique connecting the diagnostic room and adjacent functioning rooms will carry the MRI magnet immediately to the affected person. In addition, the project features a 600-auto, under-quality parking garage, 18 elevators and 6 acres of new environmentally friendly area.

The web page is on the land of the previous Kober-Cogan Constructing, which was shut down in May 2010 after the discovery of mold in the developing and formerly had housed the hospital’s psychiatry department. 

That presented exclusive worries for the undertaking team, led by Bethesda, Maryland-based mostly Clark Development. Miles of water utility lines, many of which have been not documented, were jogging right underneath the area of the new pavilion to feed each MedStar Georgetown College Medical center and the Georgetown University campus structures. The challenge staff had to relocate these utilities outside the house of the building footprint to allow for the undertaking to begin.

“The Clark group designed and engineered a 250-foot-prolonged utility bridge to guidance chilled h2o and electrical services from the central utility plant to the current MedStar Georgetown Medical center,” said Bradley Hunter, venture executive at Clark Building Team. “The bridge installation necessary shut coordination with mechanical and electrical contractors who installed the utilities on prefabricated racks which ended up then hung from steel beams measuring 60 toes, allowing for excavation to start out under.”

Clark designed a temporary utility bridge to assist active utilities for the current medical center.

Permission granted by Clark Development


Clark Building, alongside with architects HKS and Shalom Baranes Associates, assembled a BIM product of the existing utilities. As style progressed and the standard composition and caisson spots were being set, “we done further borings at all caisson destinations and even more knowledgeable the BIM excavation design,” reported Hunter.

This initial phase allowed the Clark staff to improved tell the charge product with respect to deep foundations and to start revising the excavation program. With virtually 1,000 piles to put in for help in the course of excavation, Clark recorded the real soil and utility circumstances encountered in serious-time with each and every pile and enter the facts into the BIM model. This tremendously enhanced Clark’s knowledge of the website and permitted to go on to revise and resequence the excavation program in advance of the area crews, said Hunter. 

“At the completion of pile installation, we were being in a position to have a extremely complete profile of the envisioned excavation very well in progress of the ultimate phase of excavation,” said Hunter. “With this info, we have been ready to establish mitigation strategies in an effort to decrease impacts to the essential path of the undertaking.”

Team turns to technologies on web-site

Clark carried out a preliminary survey with conventional study devices, this sort of as the Leica MS50, which combines complete station functionality, GNSS connectivity, digital imaging and 3D laser scanning in a single instrument. The 3D engineering performed checks of slab edges, precast concrete, joints and ground flatness. The technological innovation also coordinates existing properties to execute tie-ins with the façade.

Just after completing and placing study regulate factors all around the site, the team commenced the scanning and structure procedure, claimed Kathleen Lavelle, venture manager at Clark Construction Team.

“For 3D laser scanning, we use our Leica MS50 once more which has comprehensive scanning abilities. We use our study command points to tie the scanning facts into web page coordinates. After scanning is full, Leica’s Infinity software is made use of to clean up up the scan,” stated Lavelle. “This can be exported to various file formats based on the software program being employed to perform with the details.”

The study staff used Leica MultiWorx, an increase-on application to Autocad Civil 3D. This scan information can be made use of to create existing situations and as-created drawings as required.

Managing an influx of people

Due to its location adjacent to a college and healthcare centre, the Clark group had to think of options to take care of the movement of students, clients and visitors, specifically early in the COVID-19 pandemic to account for social distancing rules.

To do this, the building group crafted a temporary pedestrian bridge to preserve access together the east side of the jobsite. In addition, an on-web-site batch plant, making additional than 35,000 cubic yards of concrete, served with targeted traffic congestion by lowering the variety of deliveries to the undertaking site. The plant eradicated an estimated 3,500 vehicles off the street as properly as making certain concrete high-quality on internet site, according to Lavelle.

Removing trucks from the highway also helped minimize sounds level, a different obstacle as the design web-site is in shut proximity to various residential neighborhoods, mentioned Andree Yaap, project govt at Clark Development Group.

Clark also labored carefully with the HKS and owner to consider which undertaking factors could be produced offsite. Using a formal scoring and evaluation process, the workforce picked elements to prefabricate centered on what would supply the most gain to the project, stated Yaap.

The venture features a lot more than 700 prefabricated resources, which includes 156 lavatory pods, running place ceilings, affected individual headwalls, electrical rooms, scientific rooms, MEP skids and racks, and inside partitioning, stated Yaap.

A line of affected person bathroom pods all set to be mounted.

Authorization granted by Clark Building


Building things have been created across the place, with lavatory pods remaining designed in Texas, working area ceilings currently being crafted in Oregon, headwalls currently being built in Oklahoma and wall panels staying constructed in Virginia, claimed Yaap.

“Clark’s initiatives have assisted to expedite schedules and lower charges,” said Yaap. “Other added benefits include increased high quality ensuing from assembly in a managed atmosphere, the reduction of construction action on internet site and a reduction in sounds levels, neighborhood targeted traffic and congestion.”

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