Building 700 — Parris Island
Seismic and concrete damage study
2016
Building 700 — Parris Island
The Project
A comprehensive structural evaluation of an existing military facility—Building 700—at Marine Corps Recruit Depot Parris Island. The project involved two primary scopes: assessing the extent and severity of concrete spalling and damage, and evaluating the structure’s seismic performance in accordance with federal and military standards. This in-depth analysis ensured the continued safety, serviceability, and compliance of a key facility within an active coastal military installation.
The Challenge
Building 700 presented a dual challenge—visible concrete deterioration from spalling and cracking, and the need to verify the building’s seismic adequacy under updated Department of Defense criteria. The structure, built under older standards, lacked documentation for many of its reinforcing and detailing elements, complicating the seismic analysis. Environmental exposure typical of coastal South Carolina—salt-laden air, humidity, and temperature variation—further contributed to long-term degradation of concrete and reinforcement. Evaluating both surface and internal deterioration, while also applying the specialized procedures of ASCE 41-13 and UFC 3-310-04, required a methodical approach combining field observation, testing, and analytical modeling.
The Solution
The evaluation began with a detailed visual survey and selective destructive testing to document crack patterns, spall depths, and corrosion of reinforcing steel. Using these findings, BES developed repair recommendations that prioritized structural integrity and corrosion mitigation—such as partial-depth patching, cathodic protection, and concrete coating systems suited for marine exposure. For the seismic assessment, the team followed the Unified Facilities Criteria (UFC 3-310-04) and ASCE 41-13 methodologies, modeling the existing structure to determine its performance under likely lateral demands. The process included identifying deficiencies in ductility, detailing, and load path continuity. BES then provided targeted retrofit recommendations to bring the building closer to compliance while respecting cost and operational constraints.
The Improvements
Concrete repairs and protection systems were recommended to halt ongoing deterioration and extend the building’s service life. The seismic analysis identified critical structural deficiencies, enabling prioritization of retrofit actions such as improved diaphragm anchorage, collector strengthening, and detailing for ductile performance. By aligning the assessment with federal UFC and ASCE standards, BES provided a defensible and systematic framework for repair and upgrade decisions, balancing safety with practicality. The study also enhanced the facility’s maintenance records with detailed documentation for future inspection and lifecycle planning.
The Results
The evaluation provided Marine Corps Base Parris Island with a clear, actionable understanding of Building 700’s structural condition and seismic performance. BES’s recommendations informed both immediate repairs and long-term capital planning, ensuring the facility remains safe, durable, and aligned with current military seismic criteria. The work demonstrates how expert evaluation of aging infrastructure—supported by modern codes and standards—can safeguard mission-critical assets while avoiding unnecessary reconstruction.
