Braun Intertec was retained to assist with excavation of unsuitable soils and organic across an entire block, as well as preparation of building pads for an office building, parking ramp, Metropolitan Lofts and MacPhail Center for the Arts simultaneously.

Special inspection and testing services were performed for the earthwork portion of the project and for all other structures, excluding the MacPhail Center for the Arts, which has not been constructed at this time.

Challenges

We determined the bearing capacity of the spread footings on the soils and observed excavation of unsuitable soils, most specifically fill, organic and peat soils. For the office building, special inspections were required for the structural steel frame with lightweight concrete floor topping. We identified the chemical composition of the structural metal components after mill certifications indicated that the structural metal did not meet required yield strength capacities.

Solutions

We performed an analysis of the structural metal composition in the laboratory. Using a portable positive material identifier (PMI) at the site, we identified what structural members had chemical compositions similar to members with both acceptable and unacceptable yield strengths.

Our field personal provided continuity throughout the project, evaluating and consulting on many different areas of construction. The process was enhanced by the presence of our knowledgeable ICBO certified inspectors with experience in providing special inspection and testing services.

Most importantly, we were able to help provide CSM Corporation, the owner and the future occupant of the office building, confidence that their new headquarters will be of sound construction.