Washington, DC

Children's National Medical Center


Children’s National Health System (Children’s National) is the District’s leading provider for pediatric treatment and research. The main hospital in Washington, DC, serves as the system’s headquarters and offers a comprehensive range of services. SGH provided structural and building enclosure engineering services for many projects at the main hospital, including a building addition, interior renovations, a parking garage rehabilitation, and a plaza remediation.

The multi-story, below-grade, concrete parking structure at the main hospital includes about 400,000 sq ft of elevated parking decks and 230,000 sq ft of parking on grade. SGH assessed the garage’s condition and helped Children’s National plan for remedial work. Highlights of our work include the following:

  • Surveying and sounding to document deterioration, distress, and leakage
  • Bond testing the existing waterproofing membrane
  • Non-destructive testing to collect information about the condition and placement of embedded steel reinforcement
  • Conducting microscopic and petrographic examination of extracted concrete core samples in our laboratory
  • Designing and administering the construction contract for replacing garage expansion joints performing structural and waterproofing roles
  • Designing the first phase of a multi-phase repair and protection program for the overall parking structure

Children’s National wanted to renovate space below an existing loading dock. While removing interior finishes, the contractor uncovered leaks and leakage-related deterioration of the concrete and steel plaza structure. SGH conducted a field investigation and performed laboratory testing to assess the slab’s condition. We designed repairs for the plaza’s structure and waterproofing, and provided construction administration services for the remediation project.

SGH also designed structural modifications for a variety of projects at the main hospital and collaborated with architectural teams to support interior renovations and system upgrades associated with Children’s National modernization initiatives.

Project Summary

New Construction | Repair & Rehabilitation
Building Enclosures | Structures
Health Care & Life Sciences
Specialized Capabilities
Repair & Strengthening | Roofing & Waterproofing

Key team members

Scott Silvester
Scott Silvester