Osborn EngineeringOsborn Engineering

MedMart Project

Convention Center Foundation

Analysis

March 5, 2009

Osborn BackgroundOsborn Background• Founded in 1892/ Founded in 1892/

Cleveland FirmCleveland Firm

• Commitment to Commitment to Client-Oriented Client-Oriented ServiceService

• Staff Size: 70 Staff Size: 70

• Engineering Engineering Disciplines:Disciplines:

– Structural Structural – CivilCivil – ElectricalElectrical– MechanicalMechanical– Fire ProtectionFire Protection– Energy EfficiencyEnergy Efficiency

• Notable Notable Cleveland Project Cleveland Project ExperienceExperience

Osborn ExperienceOsborn Experience2005 & 2008 Mall 2005 & 2008 Mall Site ConceptsSite Concepts

Convention Center Convention Center Studies Since 1998Studies Since 1998

Analysis of Society Analysis of Society For Savings Bank For Savings Bank RenovationRenovation

Cleveland Browns Cleveland Browns StadiumStadium

Progressive FieldProgressive Field

Williard Park Garage Williard Park Garage AnalysisAnalysis

Burke Airport Burke Airport VibrationVibration

Scope Of The StudyScope Of The StudyProject Scope

• Understand the MMPI Concept

• Soil and Material Testing

• Analyze Existing Foundation System

• Determine the Determine the Feasibility of Feasibility of Reusing Existing Reusing Existing FoundationFoundation

• Analyze Potential Analyze Potential Impact on Impact on Adjacent Adjacent BuildingsBuildings

Study ProcessStudy ProcessStudy Process

• Workshops with MMPI, County & City

• Independent Soils and Material Testing

• Extensive Review of Existing Convention Center

• Independent Review of Project Approach

• Develop Our Own Design

• Determine Feasibility of Reusing Foundation

• Assess Risks

Significant FindingsSignificant Findings

Condition andStrength of Mat Foundation is Very Sound

•Concrete Testing Very Positive

•Chloride-Ion Results Not A Problem

•Reinforcing Steel Looks New

Significant FindingsSignificant Findings

Soil Conditions Are As

Expected

• Cleveland’s Blue Clay

• 150 Ft. To Bedrock

• Can Continue To Support Convention Center

Significant FindingsSignificant Findings

No Water Concerns

• Static Water Table 25 Ft. Below Foundation

• Existing Dewatering System Is Efficient

• No Water Infiltration

No Geyser!

Mat Foundation Can Support

New Structure

• New Loads Are Less Than Existing Loads

• Can Use Footers Or Caissons

• Recommended To Use Caissons

• Cost Premium Of < $2 Mil.

Significant FindingsSignificant Findings

Significant FindingsSignificant Findings

Very Little Risk To Surrounding

Buildings

• Re-use Continues To Support Surrounding Areas

• Recommend Wall Anchors

Significant FindingsSignificant Findings

Existing Structure

Supporting Lakeside Ave. Can Continue To Be Used

Mall Level Can Be Maintained Within Existing Parameters, or

Less

• Top of Existing Wall Around Mall

Osborn EngineeringOsborn Engineering

MedMart Project

Convention Center Foundation

Analysis

March 5, 2009