Methodology for Emergency Preliminary Assessment

Whether resulting from a fire, a vehicle impact, inadequate construction work, or occurring in winter, settlements—or partial building collapses—require a prompt preliminary assessment to determine the extent and cause of the structural deficiencies.

Wherever possible, we will aim to stabilize the building while securing the site. In winter, measuring the thickness and density of the snow present at the time of the incident must be carried out quickly to avoid alteration from weather variations.

This will allow us to determine the actual impact of the amount of snow and whether it was a factor in the collapse.

The engineer in charge of assessing the situation will begin by identifying the extent of the damage, collecting as much information as possible on site. This enables him to assess the risks of rapid deterioration and potential hazards to public safety. Based on the information gathered, emergency measures may be implemented, such as establishing a safety or evacuation perimeter, temporary stabilization or shoring of load-bearing elements, or even the demolition of building parts that are too unstable to be restored.

Beyond securing the site, the engineer seeks to determine the cause of the incident. Since several factors may have contributed to the damage, the engineer will need to gather as many relevant details as possible about the building and its maintenance history, including any improvements or additions made since its construction. It is essential to obtain the original plans, as well as those of any subsequent modifications, to better understand the building's structural behavior and recommend appropriate rehabilitation work. The information provided by the owner can also help in understanding the building’s composition and the transformations it has undergone.

Thus, based on the engineer’s observations, the collected documents and information, and, if necessary, tests conducted, the preliminary assessment can be completed to identify the cause of the damage. If needed, it can also propose the necessary interventions to provide temporary support and, if possible, rehabilitate the building.

Any sudden damage to a structure must be taken seriously and addressed promptly as it can compromise public safety. Once the risks are assessed and protective measures implemented, the causes can be further investigated, and rehabilitation solutions can then be considered.

Pyrotech BEI’s civil engineers can support you in this delicate and urgent intervention while helping you implement appropriate safety measures and rehabilitation plans, whenever possible.


By Pascal Fleury, P.Eng.
Civil Engineering Department | Construction | Structure