David P. Amori, PE, RRC
, Vice President of Engineering at EFI Global, has over 22 years of domestic and international experience as a Structural / Geotechnical Engineer
and Registered Roof Consultant
. Mr. Amori performs Forensic Structural, Geotechnical, Construction Defect, and Building Envelope
related investigations and consulting.
Mr. Amori's background includes geotechnical engineering, construction materials testing, and domestic and international construction management of commercial and heavy civil projects. He has over a decade of cost center management experience including budgeting, service line development, fiscal management, business development, employee management, recruiting, and strategic development. He has performed hundreds of forensic investigations in North and South America.
Mr. Amori has authored numerous publications and delivered many presentation on topics such as building construction, structural engineering, and building envelope investigations. He also teaches continuing education classes to individuals in the insurance industry.
Areas of Expertise
Courses Instructed / Guest Lecturer
- Structural Assessment
- Construction Defect Investigation
- Foundation Evaluation
- Structural Fire Damage Assessment
- Roof and Building Envelope Assessments
- Construction Defects
- Structural Assessment: Repair v Replace
- Storm Assessment of Commercial and Residential Roofing
- Foundation Evaluations
- Basic Building Construction
- Moisture Migration through Buildings
- Hail Damage to Residential Roofs
- EFI Roof Specialist Program – 8 hr Residential Roofing
View David Amori's Expert Witness Profile
- Master of Science, Construction Management, University of Birmingham, UK, 1999
- Bachelor of Science, Civil Engineering, University of Colorado at Denver, CO, 1995
- OSHA Fall Protection / Aerial and Scissor Lift Training
- Fundamental Elements of High Wind Design and the Windstorm Process, TDI
- RCI: Masonry Wall Systems, Exterior Wall Technology, Wind and Drainage, Professional
- Roof Consulting, Roof Technology I & II
Every spring and throughout the summer, much of the U.S. is subjected to thunderstorms that produce damaging hail. Property damage can manifest in several forms: broken windows, damaged roof top equipment, and roof damage. With a residential roof replacement starting at several thousand dollars and a commercial roof at tens of thousands, functional roof damage is probably the largest expense exposure for most buildings.
For the forensic investigator, damage assessments require taking a global look at the loss to determine all causes, including possible design and construction deficiencies.
Large losses present a unique set of challenges from the perspective of managing an expert or team of experts. For the purposes of this column, let's assume that a large loss is one that exceeds $250,000. These might include heavy civil construction, infrastructure, transportation, or a catastrophic event affecting a large building.
Roof collapses can be sudden, catastrophic events caused by a particular loading condition or combination of loads. Roof collapses often happen with little or no warning, making this a particularly dangerous event. When investigating a roof collapse, the obvious perpetrators are examined: how much snow was on the roof, were the drains plugged up, were the winds in excess of the design wind speed and many others. Occasionally, the roof can be doomed to collapse months or years before an event due to design or construction related deficiencies allowing for a subrogation opportunity to recover cost of repairs.
Often after an event like a tornado, windstorm, water surge, or fire, the damage sustained to some property structures exceeds the value of it. In these cases, an engineer might be asked to determine if the remaining foundation system is suitable for reconstruction. The motivation for this is fairly straightforward: the property may have been underinsured and saving the foundation represents an effort to reduce the reconstruction cost, or there is a desire to get the structure rebuilt as quickly as possible. In the interest of time and money, an evaluation of the suitability of the foundation for reuse can be performed. There are three main questions for the engineer to answer: Is the slab damaged by the event? Are there any other factors, such as differential foundation movement, that would prevent the slab being reutilized? Are there any code considerations that prevent the slab from being reutilized?
In the wake of a Hurricane the monumental task of beginning to assess the losses and respond to the thousands of claims inevitably includes a number of claims concerning the functional assessment of commercial roofing systems. The design and construction of a roof system requires input from several disciplines including thermal considerations (Mechanical), fire resistance (Architect/Municipality), equipment carrying capacity (Structural), ability to drain and/or to store water (Architect/Civil), aesthetics, and the ability to resist any number of transient loads (Structural). The assessment of the damage sustained by a roof system during a storm event is an equally broad endeavor requiring the expert to call on a number of disciplines.
Building envelope assessments for storm-related damage is a normal part of job for the property adjuster and forensic consultant. The assessment of storm-related damage inevitably becomes a question of whether the observed condition pre-dates the storm or is the result of sudden and recent event. In fact, the question may very well be, "Did the observed condition exist during or even before the building was constructed; is the condition the result of a construction or design related defect?"