February 17, 2011 |
The existing sundial monument is constructed of a pre-cast concrete which is supported by three steel support posts. The steel supports are supported on isolated concreted foundations and are enclosed with cement based stucco; the steel supports and stucco finish extend below grade at each of the three locations. RCSC obtained the opinion of a certified structural engineer as to the condition of the sundial monument.
This expert observed that water had infiltrated the stucco façade around the three supports and had accumulated on top of the foundations. This long-term exposure to moisture has resulted in significant deterioration of the steel members at each support location. This deterioration has significantly compromised the structural capacity of the supports, and if it continues, the supports could fail and the monument could collapse. Minor amounts of surface rust and paint deterioration are evident at the top of the supports, but these do not compromise the structural integrity of the monument and are not the main issues that make this a safety issue.
To repair the sundial monument, RCSC would have to repair the three steel supports by raising the top of the foundations’ concrete to roughly half a foot above grade to reduce the supports’ exposure to moisture. Repairs to the steel supports would have to be repaired by qualified welders with proper certification. Plus, a Special Structural Inspection would have to be provided for field welding. In addition, the stucco around the concrete foundations would have to be repaired by a licensed plaster contractor in accordance with industry standards and requirements of the latest edition of the government building code. Repairs would also require the concrete slab around the monument’s base be removed to inspect the concrete and foundation below grade. Observations made by the certified structural engineer also revealed cracking in the flanges of the pre-cast concrete. The cracks are subject to moisture intrusion into the concrete which can result in long term deterioration of the concrete and reinforcing steel.
No replacement decision has been made by the RCSC Board of Directors at this time. The Board welcomes community input.