Elements Of A Masonry Forensic Investigation Ryan Biggs
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Elements Of A Masonry Forensic Investigation Ryan Biggs

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Elements Of A Masonry Forensic Investigation Ryan Biggs Presentation Transcript

  • 1. the Elements of a Masonry Forensic Investigation
    • Jamie L. Davis, P.E.
    • Troy, NY / Skaneateles Falls, NY
  • 2. Summary
    • Background/Experience
    • Why Consider an Investigation
      • Reality vs Perception
    • When to Initiate an Investigation
    • Who to Choose as an Investigator
    • How to approach an Investigation
      • NDT Tools
    • What to Expect from the Investigation
  • 3. a little background
    • David T. Biggs, P.E.
    • Masonry Design
      • Prestress Masonry
      • Hybrid Masonry
    • Masonry Restoration
    • Masonry Investigations and Testing
  • 4. Looking Back at the World Trade Center Disaster David T. Biggs, P.E. Principal Ryan-Biggs Associates, P.C.
  • 5.  
  • 6. Restoration of Egyptian Monuments David T. Biggs, P.E., Hon. M. ASCE Ryan-Biggs Associates PC Troy, NY, Skaneateles, NY, West Chester, PA
  • 7. Edfu Temple
  • 8. Diversified Masonry Experience
  • 9. brick nogging
  • 10. Cathedral of the Immaculate Conception
    • 1848 Cathedral
    • Brownstone deterioration
    • 190 ft North Tower replacement
  • 11. University Building (1870)
  • 12. Single Wythe Walls (Architectural CMU)
  • 13. Prestress Masonry
  • 14. Prefab Masonry Panels
  • 15. Investigations/Testing
  • 16. new software options for hybrid masonry/steel structures and loadbearing masonry structures © IMI & NCMA 2008, All Rights Reserved
  • 17. the the Successful Masonry Investigation
  • 18. but WHY?????
  • 19. how about why, when, who and how???
  • 20. let’s start with ‘why’…
    • REALITY
    • vs
    • Perception
  • 21. REALITY
    • NCMA TEK 19-7
    • CHARACTERISTICS OF CONCRETE MASONRY UNITS WITH INTEGRAL WATER REPELLENT
  • 22. REALITY – NCMA TEK 19-7
    • “ Design of concrete masonry walls to mitigate or control moisture migration includes many considerations beyond the characteristics of the concrete masonry unit, such as flashing, weeps, workmanship, mortar or grout characteristics, vents, coatings, vapor barriers, air barriers, temperature differences, and accommodation of differential movement, plumbing and roof leaks, as well as other considerations.”
  • 23. REALITY – NCMA TEK 19-7
    • “ Proper design and construction of concrete masonry, considering all of these elements, is critical to the water resistant performance of the wall system.”
  • 24. REALITY – PRODUCT LITERATURE
    • “Finally, it is important to understand that while the XYZ System greatly enhances the water-resistant properties of the masonry, it should not be considered as a substitute for good design practices and quality construction procedures (workmanship).
  • 25. REALITY – RELATED TEKS
    • Refer to information in National Concrete Masonry Association (NCMA) TEK 19-2A, 19-4A and 19-5A for flashing details, as well as NCMA TEK 10-1A and 10-2B for crack control and control joint recommendations.
  • 26. Perception
    • MY BUILDING Is
    • WATERPROOF!!!
  • 27.  
  • 28. REALITY Perception
  • 29. In the World Of Perception
    • IF you have IWR cmu
    • THEN you have a waterproof building
    • THEREFORE………
    • IF your building leaks
    • THEN it must be the block
  • 30. Expectations are higher…
    • Architects detail the same
    • Engineers design the same
    • Contractors build the same
    • Efflorescence ??
    • Water Staining ??
    • Leaking ??
  • 31. When….
  • 32. Get in the loop Architect Engineer Owner Contractor Architect
  • 33. CHOICE PROACTIVE REACTIVE
  • 34. This might get ugly……….
  • 35. Time for the unbiased opinion
    • To look at the big picture
    • To give assessment of each party’s responsibilities
    • To stop the ‘blame game’
    • To redirect focus towards the solution
  • 36. Ideal Scenario
    • All parties agree on investigator
    • All parties agree to share cost
    • If not possible, be prepared to be your own advocate
  • 37. AN INVESTMENT OF GOOD WILL
    • Team player
    • Confident in performance of product
    • Solution oriented
    • Nothing to hide
    • BE PART OF THE SOLUTION NOT THE PROBLEM
  • 38. $$$$$$$$$$$$$
    • Split costs
    • Pay upfront /Reimbursement based on results
    • Precedent AIA contract wording
  • 39. WHO?
    • Experience:
      • Detailing
      • Engineering
      • Construction
      • Materials/Products
  • 40. Who Not
    • Testing Labs
    • Limited Background
    • Ability to Decipher Results
    • Engineering Judgement
    • The Specialist
  • 41. WHO?
    • NO BLINDERS
    • No Preconceived Conclusions
    • Solution Oriented vs Blame Game
    • Fact Driven
  • 42. HOW?
    • Each is unique
    • No cookbook approach
  • 43. NDT Experience
    • Why?
    • Mindset
    • Thought Process
    • Access to multiple tools
  • 44. Flat-jack
  • 45. Borescope
  • 46. Ultrasonics - Impact echo
    • ASTM C1383
      • Flaw detection
  • 47. Transducer and Impactor
  • 48. Ultrasonics - Pulse velocity
      • ASTM C597
      • Flaw detection
      • Sonic Tomography
  • 49. Transmitter - Receiver
  • 50. Sonic Tomography
    • Pulse Velocity
  • 51. Surface Penetrating Radar
  • 52. Surface Penetrating Radar 17.6 inch
  • 53. 3D Scan
    • Radar
  • 54. Acoustic Emission Technology
  • 55.  
  • 56. Infrared Thermography
  • 57. Grout verification
  • 58. Infrared Thermography
  • 59. The Investigation
    • Approach
    • and
    • Expectation
  • 60. Meet the Team
    • Face to face with the players
    • Hear their side
    • Read the mood/tone
    • Level of cooperation
    • Listen for the details
    • Pick up the inconsistencies
  • 61. the Contract Documents
    • Learn the building
    • Know the details
    • Look for potential problem areas
  • 62. Paper Trail
    • Spec Requirements
    • Submittals…requested and received
      • Masonry Certs. – C90/C140
        • Strength/Absorption/Density/Current f’m 2000
      • Mortar mixes
      • Preconstruction Testing
      • E514: 5 ½” of rain/hr with 62.5 mph wind.
      • Manufacturer Certs/Product Data
      • Producer/Installer Warranties
    • Mock-ups
    • Field Reports/Construction Photos
  • 63. Visual Observations
  • 64. Exterior clues
  • 65. Know the details to read the clues
  • 66. Interior clues
  • 67. Look beyond the block
  • 68. Up close and personal
  • 69. The finer details
    • Mortar Joints
      • Head joints
      • Construction
      • Profile
  • 70. Head Joints: NCMA Tek 19-2A
  • 71. Testing
  • 72. Testing Possibilities
    • Mortar/Block analysis
      • Solvent Extraction
      • Infrared Spectrophotomery
      • Gas Chromatography
  • 73. Testing Possibilities
    • “ Including ASTM E514 Tests in Field
    • Evaluations of Brick Masonry”,
    • Hoigard, Kudder, Lies
    • Replicate Preconstruction Testing if missing
      • ASTM C140: absorption and density
      • ASTM E514:water penetration
    • Trial Field Tests
      • Start simple
      • Water droplet/spray bar/wateruptake
  • 74. The Report
  • 75. Report Expectations
    • Statement of Facts
    • Limitations of Investigation
    • Evaluation of Testing
    • “Tell them what you know, Tell them what you don’t know”
    • Statement of Responsibilities
  • 76. Summary
    • Be Proactive
    • Meet Spec Submittal Requirements
    • Compile Records/Paper Trail
    • Photos
    • Attempt to solve as part of the team
    • Be prepared to be your own advocate
    • Research options for investigators; look for experience/background
    • Demand factual/unbiased report
  • 77. Focus on Success!