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A-D Engineering Group Ltd. Web Site

Contact Us : (905)773-2088   (905) 898-3514     Fax # (905) 898-1998

mailto:adstruct@on.aibn.com

Assessment Reports and Expert Testimony for Buildings Damaged by :

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Fire
water
blasting
excessive overburden
construction flaws
errors in construction procedures
structural design errors
vibration/impact by construction vehicles
frost heave and adfreeze
soil settlement
excessive wind, snow, and live loads
improper temporary shoring
thermal effects
contact between incompatible materials
erosion, ice damage
decay, pests
chemical attack
vibration and fatigue
vandalism and abuse
 

We provide complete services for preconstruction surveys, seismic monitoring, and post construction surveys.

Our assessments have been applied to:
residential buildings
industrial/commercial buildings
institutional buildings
historic buildings
recreational buildings
towers
retaining walls
culverts, small bridges
parking garages
tanks
temporary works (scaffolding, shores, swingstages, etc.)

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ABOUT INVESTIGATIONS

The principals and staff of A-D Engineering Group Ltd. possess expert knowledge and experience in many fields of structural analysis and design, including steel, reinforced and prestressed concrete, masonry, sawn and glulam timber and structural fabrics.

As a result, we are frequently called upon to investigate, and provide opinions on, failures or behavioral problems which have occurred due to design or construction errors, or deterioration of existing structures. In this area our services include: analyses; reports; expert opinions; appearance as expert witnesses for arbitrations, litigations and coroner’s inquests; arbitration services; and design of remedial work.

Typical for the type of project for which these services have been provided are failures of bridges, foundations, roofs, parking garages, masonry walls and precast wall panels both during construction and while in service; collapse of formwork and falsework; structural damage resulting in fire, corrosion or collisions; storage tank and silo failures; communication tower failures; and technical audits of existing or planned structures to assess structural integrity.

A selection of a few more prominent investigations projects conducted by our staff in the last twenty-five years include:
four level parking garage collapse during construction in the Highway 10 & Burnhamthorpe Road area of Mississauga (1978)
expert testimony for Professional Engineers Ontario disciplinary hearings (the longest such hearing in PEO records involving developer defendants in 1978 and 1979)
investigation of design errors for lawyers Atlin Goldenberg et al involving major renovations to the Oshawa Cantre (1980)
Polysar warehouse collapse, Sarnia (1980)
redial tension failure of glulam arch structures, during construction, for potash storage building in Sussex, New Brunswick (1982)
Pickering College (Newmarket) fire damage investigation for insurance company (1981)
investigation into the roof failure of the underground parking garage of the residence of the president of Apotex Inc. (1994)
investigation of claims by residents against the Ministry of Transportation (Ontario)
concrete forming and test strength investigations for concrete suppliers (1986 to present) involving expert testimony in court
investigation of Baycrest Hospital pool (Toronto) for EGM Cape (1987)
investigation of claims against the contractor for the Department of Justice and Defence Construction Limited for the new military barracks in Kingston (1991) including preparation for examination for discovery and expert testimony
general investigations of multiple dwellings and single family residences for claims against contractors and involving HUDAC
expert testimony for Ontario Municipal Board hearings on behalf of property owners and landlords

Typical clients for whom investigations are undertaken include:

Owners

Lawyers

Insurance Adjusters

Architects

Consulting Engineers

Contractors

Developers

Federal Government (various Ministries and Departments)

Provincial Government (various Ministries and Departments)

Municipal Governments

School Boards

Utilities

Crown Corporations

 

ENGINEERING SERVICES PROVIDED FOR RESIDENCES

(Current Workload ~ Approximately 250 Residences/Year)

  1. Provide expert testimony for homeowners for construction deficiencies.
  2. Act as mediator between the Ministry of Transportation (Ontario) and Ontario homeowners for damage caused by highway improvements (blasting, water, salts, etc.)
  3. Design, detailing, and drawing (for construction purposes) residential new construction, additions, alterations, and restoration.
  4. Structural evaluations of residences scheduled for resale.
  5. Structural assessments and reports for homeowner perceived deficiencies.
  6. Provide Ministry of Labour investigation input and expert testimony for residential collapse and injury during construction.
  7. Design temporary shoring for residential structures deemed to be unsafe.
  8. Provide solutions to residences damaged by fire.
  9. Settle construction disputes on residential sites with regard to concrete quality and strengths by investigation and conducting tests.
  10. Design of new proprietary structural components for material suppliers for use in residential construction.
  11. Expert testimony for Professional Engineers Ontario disciplinary hearings (the longest such hearing in APEO records involving developer defendants in 1978 and 1979) for a multi-storey residential building in Orillia.
  12. Expert testimony for Ontario Municipal Board hearings on behalf of property owners and landlords.

Note: above work conducted by David Lehman, P.Eng

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