Fire escape ladders with clips or fixed hooks designed to attach to pre-installed fixings underneath a window would be suitable for balconies, for example:
Do not use standard "hook type" portable escape ladders as these are designed to fit over a windowsill and will not hold securely onto a balcony or other railings.
(doc:538 V1.0). Our articles are reviewed regularly. However, any changes made to standards or legislation following the review date will not have been considered. Please note that we provide abridged, easy-to-understand guidance. To make detailed decisions about your fire safety provisions, you might require further advice or need to consult the full standards and legislation.