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IRIC safety alert

Safety Action Notice – SAN2302

Published on 22 February 2023

From: Health Facilities Scotland

SAN2302 - Reinforced autoclaved aerated concrete (RAAC) planks in building roofing, walls, and flooring: risk of catastrophic structural failure



Reinforced autoclaved aerated concrete (RAAC) planks were used in building roofing, walls and flooring from the 1960s to the early 1990s and may still be in situ in buildings used today. RAAC planks are considered relatively weak and prone to degradation over time due to external factors. The limited visible exposure of panels to assess their condition may result in catastrophic failure without warning. Recommendations are given on identification, risk management, monitoring and replacement of RAAC planks.