BS EN 13381-2. Test methods for determining the contribution to the fire resistance of structural members. Part 2. Vertical protective membranes Structural members, Construction systems parts, Fire resistance, Fire tests, Fire safety in buildings, Membranes, Protective barriers, Vertical, Loadbearing walls, Partitions, Columns, Beams, Steels, Concrete structures, Structural timber, Composite materials, Fire safety, Surface spread of flame, Flame propagation, Performance testing