37 Building construction for commercial purposes; repair, construction, on-site assembly, installation and disassembly of scaffolding, mobile scaffolding, facade scaffolding, couplings for scaffolding, elevating work platforms, raised platforms, high-water footbridges and catwalks, mobile fencing, modular roofing, modular scaffolding, room scaffolding, safety scaffolding, tubular coupling scaffolding, supporting frames, hanging scaffolds, tribunes, tents, balconies, industrial facades, fences, gates, safety barriers, burglary installments and checking apparatus, stages, exhibition halls, car exposition halls, modular buildings, products concerning safety regulations, namely, mobile fences, sliding gates, barriers, security fences, automatic gates, revolving gates, field trelliswork fences, bar grate fences, infrared sensors, transmitters, access control devices for automatic doors and gates; rental of scaffolding, modular buildings, gates, fences and barriers; rental of security systems and safety systems for construction sites, construction equipment, construction materials, tents, pavilions, marquees, shelters, halls, buildings, gates, doors, fences and barriers