Bangkok:The collapse of a concrete awning on a nearly 60-year-old commercial building in Soi Pracha Songkhro, Din Daeng District, has raised concerns about the structural integrity of older buildings. The incident, which blocked the entrance to three adjacent units, is part of a recurring issue with old building awnings, as highlighted by Prof. Dr. Amorn Pimanamas, President of the Structural Engineers Association of Thailand and professor at Kasetsart University.
According to Thai News Agency, Dr. Amorn discussed similar incidents, such as a collapse near Soi Samran Rat, Phra Nakhon District in 2025, and another at the Mo Mi intersection on Rama IV Road in June 2026, which resulted in a fatality. These examples underline the ongoing problem of aging building structures and the collapse of their awnings.
Dr. Amorn identified five main factors contributing to these collapses. First, the cantilever design of awnings, which relies on a single support point, makes them vulnerable. Second, older buildings often suffer from deteriorating materials, including porous and weakened concrete and rusting reinforcing steel. Third, exposure to the elements accelerates the deterioration of these materials. Fourth, the method of awning attachment, whether to the inner floor or wall, affects its strength. Finally, poor drainage can lead to water accumulation, adding excess weight to the structure.
He emphasized the importance of regular inspections and maintenance, particularly for structures over 60-70 years old, as they are at greater risk of collapse. Building owners should monitor for signs of structural distress such as long cracks and rust. Immediate action, including the involvement of an engineer, is advised if these signs are observed. Additionally, Dr. Amorn called on local authorities, like the Bangkok Metropolitan Administration, to conduct periodic inspections and provide guidance to building owners on necessary structural improvements.