The Truth About Parking Structure Maintenance How to Protect Your - - PowerPoint PPT Presentation

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The Truth About Parking Structure Maintenance How to Protect Your - - PowerPoint PPT Presentation

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The Truth About Parking Structure Maintenance How to Protect Your Investment Presented By: Innovative Engineering Inc. SCOTT L. WEILAND PE Thursday February 20, 2020 Learning Objectives Parking Structures Structure Types Cost

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The Truth About Parking Structure Maintenance How to Protect Your Investment

Presented By: Innovative Engineering Inc. SCOTT L. WEILAND PE

Thursday February 20, 2020

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Parking Structure Maintenance

Learning Objectives

  • Parking Structures
  • Structure Types
  • Cost Comparison
  • Lifecycle Costs
  • Conditions Facing Parking Structures
  • Common Deficiencies
  • Importance of Routine Maintenance & Timely Restoration
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Parking Structure Maintenance

Innovative Engineering, Inc.

  • Scott L. Weiland PE
  • BSCE University of Michigan
  • Graduate Studies:
  • San Jose State University
  • Georgia Institute of Technology
  • PE in 20 States + PR & Guam
  • Parking Consultants Council
  • 39 Years in Design and Construction
  • BOMA Georgia Insight magazine
  • Parking Structure Maintenance Part 1 & 2
  • Falling Building Façade Closes Atlanta Streets
  • National Parking Association Parking Magazine
  • Parking Structure Maintenance
  • Parking Today
  • Why is it Raining in my Parking Structure?
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Parking Structure Maintenance

Innovative Engineering, Inc.

  • Trey Thomas PE
  • BSCET, Southern Polytechnic State University
  • 16 Years in Design and Restoration Engineering
  • Co-author of Parking Structure & Forensic articles
  • Certified in Mold, Lead & Asbestos Surveying
  • OSHA Competent Person for Boom & Scissor Lifts
  • SPRAT Level 2 Rope Access Technician
  • FAA Part 107 Remote Pilot Certificate
  • FAA Part 107 Daylight Waiver
  • Level I Certified Thermographer
  • Expert estimator (within 5% of actual)
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Parking Structure Maintenance

Structural Systems

Cast-in-Place Concrete Precast Concrete Structural Steel

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Parking Structure Maintenance

Other Systems (generally not recommended)

Mild Reinforced Concrete Prone to Cracking Composite Metal Deck on Steel Deck Traps Moisture Bar Joists w/Metal Deck Prone to Cracking Hollow Core Slabs on Steel/Conc. Prone to Water Intrusion Filigree Slab Soffits on Steel Prone to Cracking Keystone Joist & Beam Soffits Florida, Steel Connections, Cracks

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Parking Structure Maintenance

Cast-in-Place

  • Advantages
  • Flexible Geometry
  • Monolithic, Fewer Joints
  • Reduced Maintenance Costs
  • Longer Life Expectancy
  • Higher Durability
  • Disadvantages
  • Higher Initial Investment
  • Longer Schedule
  • More Labor Intensive
  • Difficult Quality Control
  • Weather Dependent
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Parking Structure Maintenance

Precast Concrete - Advantages

  • Advantages
  • Lower Initial Investment than CIP
  • Fabricated in Controlled Plant

Environment

  • Not Weather Dependent
  • Accelerated Construction Schedule
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Parking Structure Maintenance

Precast Concrete - Disadvantages

  • Disadvantages
  • May be no local plant
  • Geometry not Flexible
  • Lower Perceived Ceiling heights
  • Shearwalls (Closed In)
  • More Joints
  • Prone to Thermal Expansion &

Contraction Damage

  • Corrosion of Steel Embedments
  • Higher Maintenance Costs
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Parking Structure Maintenance

Structural Steel

  • Advantages
  • Lower Initial Cost than Precast
  • Accelerated Construction Schedule
  • Fabricated in Controlled Environment
  • No Shearwalls (Open)
  • Disadvantages
  • Corrosion Issues
  • Higher Maintenance Costs
  • Not Suitable for Fire Protection
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Parking Structure Maintenance

Typical Annual Life Cycle Costs/Space

$550 $467 $333 $165 $250 $450

$0 $200 $400 $600 $800 $1,000 CIP Precast Steel Cost/Space Maintenance Initial

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Parking Structure Maintenance

Parking Structures

  • Not Bullet Proof
  • No Protective Skin
  • Deterioration Starts Immediately
  • Subjected To:
  • Moisture (Rain, Snow, Ice, Deicing

Salts)

  • CO2 Carbonation
  • Extreme Thermal Expansion &

Contraction

  • Dynamic Vehicle Loads
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Parking Structure Maintenance

Structure Degradation

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Parking Structure Maintenance

Irving Texas, O'Conner Ridge Blvd. Collapse

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Parking Structure Maintenance

Irving Texas, O'Conner Ridge Blvd. Collapse

  • What we know
  • Old Parking Structure
  • Expansive Soils in TX
  • Exterior Columns Leaning
  • Cracks Sealed with Sealant
  • No OSHA Report
  • Demolished
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Parking Structure Maintenance

Irving Texas, O'Conner Ridge Blvd. Collapse

  • Typical Precast Double Tee

Joist Seat

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Parking Structure Maintenance

Common Deficiencies

  • Number 1 Enemy

WATER

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Parking Structure Maintenance

Common Deficiency: Corrosion

A: Spall B: Crack C: Corner Spall D:Delamination

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Parking Structure Maintenance

Common Deficiency: Spall & Delamination

Spall Delamination Section Loss

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Parking Structure Maintenance

Common Deficiency: Exterior Spalls

Spall Over Sidewalk Spall Size

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Parking Structure Maintenance

Common Deficiency: Ponding

Ponding Supplemental Drain

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Parking Structure Maintenance

Common Deficiency: Failed Joints

  • Why is it Raining in my Parking

Structure?

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Parking Structure Maintenance

Common Deficiency: This is Why

Sealant Failure Cracks Expansion Joint Failure

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Parking Structure Maintenance

Common Deficiency: Failed Joint Sealant

Drainage & Joint Plan

  • Precast
  • All orthogonal lines are sealant Joints
  • Diagonal lines are slope lines
  • Cast-In-Place Slab
  • Expansion joint in middle
  • Joint sealant at perimeter and at stair

towers

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Parking Structure Maintenance

Common Deficiency: Cracks to be Sealed

.013” < Cracks < .035” Cracks that Leak < .035”

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Parking Structure Maintenance

Common Deficiency: Epoxy Injection

Cracks > .035” Inflatable Injection Port

Photos by Engineered Restorations Inc.

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Parking Structure Maintenance

Common Deficiency: Corrosion

A: Spall B: Crack C: Corner Spall D:Delamination

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Parking Structure Maintenance

Common Deficiency: Sounding

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Chloride Ion Testing

Chloride Ion Concentration Dust at Various Depths

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Parking Structure Maintenance

Carbonation Testing

Depth of Carbonation Coring Slab

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Parking Structure Maintenance

Common Deficiency: Last Resort

Traffic Bearing Membrane

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Parking Structure Maintenance

Common Deficiency: Better Option

  • Silane Sealer
  • Water Retardant
  • Breathable
  • Fills Pores of Dense Concrete
  • Minimizes penetration of

water and chemicals

  • Reapply 5 to 10 years
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Parking Structure Maintenance

Common Deficiency: Failed Spall Repair

Improper Surface Preparation

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Parking Structure Maintenance

Common Deficiency: Overloaded – Fire Truck

Broken Precast Spandrel Beam

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Parking Structure Maintenance

Common Deficiency: Curbs & Wheel Stops

Broken Wheel Stop Broken Curb

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Parking Structure Maintenance

Precast Shear Transfer Repair

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Parking Structure Maintenance

Precast Shear Transfer Repair

Precast Double Tees Shear Transfer Repair

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Parking Structure Maintenance

Structural Steel Corrosion

  • Steel Protection &

Corrosion Issues

  • Steel Deck Traps Moisture,

Hides Degradation.

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Parking Structure Maintenance

Precast Haunch Connection Failure

4 Months Later Precast Beam Haunch

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Parking Structure Maintenance

Precast Haunch Connection Repair

Applying Epoxy Bonding Agent Shoring to Remove Load

Photo by Engineered Restorations Inc.

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Parking Structure Maintenance

Precast Haunch Connection Finished Repair

Good as New

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Parking Structure Maintenance

Maintenance Cost Curve

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Parking Structure Maintenance

Maintenance Cost Curve

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Parking Structure Maintenance

Maintenance Cost Curve

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Parking Structure Maintenance

Maintenance Cost Curve

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Parking Structure Maintenance

Reactive Maintenance

Now Demolished

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Parking Structure Maintenance

Learning Objectives

  • Parking Structures
  • Structure Types
  • Cost Comparison
  • Lifecycle Costs
  • Conditions Facing Parking Structures
  • Common Deficiencies
  • Importance of Routine Maintenance & Timely Restoration
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Parking Structure Maintenance

Questions?

Scott L. Weiland PE

Innovative Engineering Inc. 3380 Trickum Road

  • Bldg. 500, Suite 100

Woodstock, Georgia 30188 sweiland@ieiusa.com 770-517-5507 Ext. 202