technical standards 527 thermal insulation 42 standards 33 protection of buildings 32 concrete constructions 31 concretes 30 electrotechnics 27 more ... fire protection 27 provisions 25 civil engineering 25 safety of work 23 programmable logic circuits 21 programming 21 automation 19 building designing 19 calculations 19 normalization 18 material testing 18 steel structures 16 computer security 16 ventilation and air-conditioning 16 insulation materials 15 simulation and modelling 15 construction materials 15 building constructions 15 iron-concrete constructions 15 energy 13 production 13 buildings (architecture) 12 heat transfer 12 less ...