NCSU Broughton Hall – Doorway Structural Repairs

A doorway opening over the northeast lower-level entrance of the Broughton Hall and NC State University has experienced significant deterioration of concrete structural members. NCSU requested Atlas Engineering to provide design services for permanent repairs.

We visited the site to review the existing conditions and compare those to the available as-built drawings. Atlas recorded the existing conditions with photos, notes, and measurements. During the initial site visit, plywood enclosure was already erected under the deteriorated areas to prevent the falling the the any deteriorated concrete. Additional notes were taken on the types of materials that comprised the structure of the lower-level entrance including but not limited to walls, ceiling, fascia, and the walkway over the entrance. This and other information gathered during the fieldwork and from the as-builts was helpful in determining the ultimate loading.

One of the key features of the existing entrance facade were large limestone blocks. After the assessing the blocks, we determined that they were in the good condition and that we should be able to reused them.

Atlas Engineering developed repair drawings that included repair details, shoring, and necessary specifications. Since the entrance was a part of the existing walkway which tied to the existing building, Atlas recognized that it was necessary to show the repair and shoring sequence in our design drawings.

During the construction, Atlas Engineering came out to the site several times. During the demolition, it was discovered that the main steel shelf angle and original reinforcement were completely deteriorated. Contractor , IQ Contracting, was able to follow the design and salvage limestone fascia blocks successfully.