Agenda - Council - 08/12/2008 - Laserfiche WebLink

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CASE # r~ PERIODIC INSPECTION OF PARHING RAMP By: Steven Jankowski, City Engineer Background: The Ramsey Town Center parking ramp was constructed in 2008 and is a part of the City's public works infrastructure which must be maintained to insure public safety. Staff has researched the requirements for the periodic inspection of similar structures in other communities and the building industry. The purpose of this case is to present to Council a schedule for the periodic inspection for this and similar future structures within the City and also identify budget resources that will be required in implementing these inspections. There are three levels of inspection associated with parking ramps as defined below: • Type I Strictural Condition Survey includes the visual observation of all. structural components including but not limited to, the top and bottom of all structural floors, helixes, and all supporting beams, columns and walls. • Type II Structural Condition Survey includes visual observations plus nondestructive test such as, but not limited to, chloride ion concentration tests, concrete relative compression strength tests, half cell testing, pachometer reading, tapping, chaining, and dragging. • Type III Structural Condition Survey includes visual observations and nondestructive tests plus destructive testing, such as but not limited to, the physical removal of concrete for the purpose of exposing reinforcing steel, prestressing or post tensioning anchors, (to document the amount of corrosion at the grippers, in the strand, and on the unstressed face of the anchor), expansion or contraction joints, or any other buried steel. Concrete cores samples might be used to document compressive strengths. The schedule for performing the above tests should be considered as .follows: • No structural condition survey is required for five (5) years following construction. • A Type I Structural Survey should be performed in the sixth year (2012). • A Type I Structural Survey should be performed in the seventh year (2013) • A Type III Structural Survey should be performed in the seventh year (2014), however a Type II Structural Survey maybe substituted for a Type III when judged appropriate by the reviewing structural engineer. The engineer's recommendation in this case should be substantiated with written documentation. -182-