Nairobi’s 22-Storey collapse turns fatal as construction failures continue to repeat

A partial structural collapse at a 22-storey building under construction in Westlands, Nairobi, has triggered emergency response operations and renewed scrutiny over construction safety practices in the city. The incident occurred on the evening of March 18 along School Lane, where part of the upper structure gave way while workers were still on site.

Initial reports indicated that four workers were present at the time of the collapse. Two managed to escape without injury, while others were trapped beneath the debris. Rescue teams, including the Kenya Red Cross, were deployed immediately and began search and recovery operations using specialized equipment. Subsequent updates confirmed that all workers were eventually accounted for, with at least one fatality reported and others sustaining injuries of varying severity.

Authorities secured the site to facilitate safe rescue operations and launched an investigation to determine the cause of the failure. The timing of construction activities, reportedly occurring at night, is also under review as part of the ongoing inquiry.

Partial collapses in multi-storey buildings under construction are often associated with localized structural failures rather than total system collapse. In this case, early indications suggest that upper floor elements may have lost stability, leading to progressive failure within a confined section of the structure.

Common technical causes in similar incidents include:

• Inadequate temporary support systems during construction
• Premature removal of formwork or shoring before concrete achieves the required strength
• Overloading of partially completed structural elements
• Poor quality control in materials or workmanship
• Deviations from approved structural designs

High-rise construction requires strict sequencing of works, particularly for reinforced concrete frames. At intermediate stages, structural elements may not yet have achieved full load-bearing capacity, making them vulnerable to instability if construction loads exceed design assumptions.

The presence of construction equipment and materials on upper levels can further increase localized loading, especially if load distribution has not been properly accounted for in temporary works design.

The Westlands incident is part of a series of recent building collapses reported across Nairobi, including similar failures in Shauri Moyo, South C, and other urban districts. These repeated incidents point to broader challenges related to construction oversight, compliance with building codes, and site supervision.

Experts have highlighted several contributing factors:

• Rapid urban development placing pressure on project timelines
• Inconsistent enforcement of structural design approvals
• Limited on-site inspection during critical construction phases
• Use of substandard materials in some projects

In parallel with the Westlands collapse, another building failure was reported in Kericho County, where multiple individuals were trapped and casualties recorded. These back-to-back events have intensified calls for stricter regulatory enforcement and improved quality assurance procedures across the construction sector.

Authorities have urged developers and contractors to adhere strictly to structural design specifications and safety regulations. Emphasis has also been placed on the need for routine structural audits and inspection protocols during construction, particularly for high-rise developments.