Specifies all significant hazards, hazardous situations and events which are relevant to horizontal beam panel sawing machines where the saw unit of the front cutting line is mounted below the workpiece support and which are manually or mechanically loaded and/or unloaded, fitted with: - a side pressure device and/or; - the facility for scoring and/or; - the facility for post-formed/soft-formed edge pre-cutting and/or; - a panel turning device and/or; - a pushing out device and/or; - pneumatic clamping of the saw blade and/or; - a powered panel loading device and/or; - a grooving device and/or; - additional cutting line(s) inside the machine for longitudinal and/or head cut (before transversal cutting line) and/or; - workpiece vacuum clamping as part of a panel turning device or of a panel loading device.