Strength Verification of Accessing and Rescue Ladder Stile

This paper presents an approximate stress analysis of stiles during ladder loading. The load is based on the standard EN 1147: 2010 Portable ladders for fi re-fi ghters (Dufek et al., 2010). Portable ladder used at Fire Rescue units consists of four parts. It has three parts with seven rungs and one part with nine rungs. The total length of the four-part set is about 8.3 m and the total weight is about 44 kg. The ladder is made of aluminium alloy Al-Mg-Si material according to EN 6060 (Kolarik, 2007). It is designed for the intervention and rescue operations of fi refi ghting units as a part of the equipment of fi re intervention vehicle (Tauchman, 2010). No more than three people can stay on one ladder at the same time. User’s control of ladders is performed according to the Methodology of the operability checking of fi re equipment and material means for sectional fi re ladder (Stepan, 2010).