5.4. SR 07-06-2009 - Laserfiche WebLink

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March 3, 2009 Rich Czech Arena Manager 1000 School Street Elk River, MN 55330 Re: Elk River Skating Facility -Phase One, Structural Report Dear Rich, LINDAU COMPANIES, INC. PROFESSIONAL ENGINEERS 1074 OLD Hwv 35 HUDSON, WI 54016 (715) 386-4444 OFFICE (715)386-1441 FAx Per your direction we visited the "Barn" ice skating facility on February 25, 2009 to visually review the condition of the roof structure over the west ice rink in an effort to locate deteriorated structure for documentation in this report. The scope of our work was to determine if there is a reason for concern thus dictating a more encompassing investigation. This report will also note our proposed fee for future involvement in this investigation. Upon the completion of the next phase of the project Lindau Companies, Inc. will issue a final report noting our findings, opinions, and recommendations. It is possible that construction documents will be required for moving forward with our recommendations. Our review, observations, and opinions relate solely to the building structure and not to non-structural items such as architecture, egress, mechanical and plumbing systems, or environmental considerations. In the case that we note non-structural issues within this letter it is for the sole purpose of noting the need for the review of these items by a professional trained in that discipline. Overview and Conclusion: Within the "Barn" we located several steel structural members and non-structural steel that had corroded. Although this corrosion may be classified as "surface rust" with no scaled or expanded steel being discovered we are concerned that our limited review was not adequate for determining the extent of the corrosion. Factors associated with the corroded members suggest that the corrosion is due to condensation or wind blowing rain through the roof deck at the building peak and not a leaking roof deck. Condensation was noted on the underside of the galvanized steel roof deck and water marks on the underside of steel beams. Additional observations/investigations are recommended as follows: 1) Further examination of the roof, including thermal imaging, by roofing and building envelope expert for leakage. 2) Review of additional areas exposed for determining the extent of corroded steel. 3) Testing of dark grey areas as noted in pictures.