Coronavirus: Safeguarding of construction sites during a cessation of works

Work stoppages can occur on construction projects for a number of reasons including bankruptcy, principal’s insolvency (contractor not paid), decision of public authorities, infectious disease – such as the current coronavirus outbreak - and natural disasters. “However, the potential for losses from events such as fires, vandalism and theft and flooding remains when sites are idle or largely unoccupied, and can even be exacerbated,” says Jay Siegel, Senior Team Leader, Energy and Construction Risk Consulting at AGCS. “To minimize project losses it is critical that actions are taken to protect the project.”

Consider temporarily removing valuable building materials to a secure area if possible. Secure all packaging and materials that could be adversely impacted by weather (i.e. high winds). Remove, secure, isolate or neutralize chemicals to prevent their release or their reaction together if disturbed. Ensure all flammable liquids and gases are removed from the site where appropriate.  To mitigate the risk of a fire loss, consider removing from the construction areas prior to vacating the site all paper and other combustible materials (wood, sawdust, trash, etc.).

It is critical that equipment and machinery are protected in the event of work stoppage.  Consider delaying the delivery of equipment to the jobsite until the project is resumed. For equipment already onsite, where appropriate, cover it with fire-resistive covers or suitable sheeting for added protection.  Address the most critical equipment first when defining priorities for loss prevention measures. Measures of criticality include potential damage and potential delay (lead time of spares).

If possible complete portions of the work in such a way as to reduce rework and losses when the project resumes.  For example, complete concrete placements to prevent cold joints; finish mud slabs as a means to cutoff water from below foundations; complete temporary roof structures to prevent water damage; and complete/ or secure structural frames to prevent instability. Prior to leaving the site, consider having a structural engineer perform a visual inspection of works, evaluating the potential stoppage period.

A stoppage could expose the project to seasonal events which were not anticipated, such as snow, hurricane force winds, freezing, etc.  Consider the consequences of these events on the uncompleted works and a full inspection of the worksite to prevent the risk of water intrusion. Excavations and trenches also pose risks. Consider adjusting the slope of excavation to prevent sloughing/collapse from heavy rainfall while deep excavations should be protected to prevent water infiltration resulting in geotechnical instability. If needed, consider refilling trenches to avoid the risk of collapse with damage to existing cables and pipelines.

Consider what testing and inspections may be required prior to restarting the project. When recommissioning, inspect the condition of MEP systems (electrical, water and gas systems) prior to energizing or pressurizing. Have all engineering disciplines (structural, mechanical, electrical, geotechnical, etc.) inspect their respective works prior to resuming construction to confirm the project integrity.