Uncovering Structural Risk: Forensic Assessment of an Underground Garage

Mayta + Sebastian Architecture recently conducted a forensic investigation of a single-level underground parking garage located within a residential complex. The structural system consists of concrete-encased steel beams and columns, masonry brick and concrete walls, and a slab on grade.

During the investigation, cracks were identified on several concrete-encased steel beams. Probes revealed that the cracks extended through the concrete and aligned with the bottom flange of the steel, indicating possible long-term stress or corrosion.

The perimeter masonry brick and concrete walls exhibited structural cracks, and sounding confirmed that water infiltration had contributed to the bowing of the brickwork. These conditions compromised the wall’s load-bearing capacity.

The concrete slab on grade displayed several visible cracks. Upon sounding the slab, multiple hollow areas were detected surrounding the cracks, suggesting potential soil settlement beneath, likely due to water infiltration.

Additional probing revealed a deteriorated steel lintel beam above the main garage entrance, with visible section loss. The masonry wall above showed a slight lateral tilt, adding to the structural concern.

Lastly, a drain line assessment was conducted. Probing and scanning determined that the drainage system was not functioning properly—existing pipes were clogged and deteriorated, exacerbating moisture-related damage.

These findings underscore the importance of regular structural assessments, especially in environments vulnerable to moisture and soil movement. Early detection and repair planning are essential to preserving safety and structural longevity.