A safety system for the construction of a structure using at least one wooden component which is to be attached using wood screws, minimum requirements arising from the structure being set for properties of the wood screws as regards their mechanical loading capacity and their resistance to environmental influences and in particular for properties of their general use, and the safety system comprising: a coding system having a number of sub-codes (c j), each one of the sub-codes representing predetermined graduated regions (e j) for each one of these properties and a combination of a respective element (b j,k) of the image set (b j) of each sub-code forming an identification feature that can be deciphered by the coding system for a respective wood screw, and the safety system further comprising: a wood screw that can be used for the attachment of the wooden component and so that can be identified by an associated sufficient identification feature, the associated identification feature being completely retrieveable at at least one location, characterised in that the coding system for each property of the group relating to the mechanical loading capacity: characteristic yield moment, characteristic pull-out parameter, characteristic head pull-through parameter, characteristic tensile capacity and characteristic torsional strength has a sub-code, and the image set of all sub-codes of this group is made up of alphanumerical characters, the representation of each sub-code of this group being given according to a pre-specified rank order, and the rank order being such that an identification feature of the same rank or of a higher rank in comparison with a sufficient identification feature (I≥A) indicating the fulfilment of all set minimum requirements when deciphering with regard to each of the individual (b j) combined elements (b) implies fulfilment of the minimum requirements, and the completely retrievable identification feature being in particular the lowest rank sufficient identification feature. a coding system having a number of sub-codes (c j), each one of the sub-codes representing predetermined graduated regions (e j) for each one of these properties and a combination of a respective element (b j,k) of the image set (b j) of each sub-code forming an identification feature that can be deciphered by the coding system for a respective wood screw, and the safety system further comprising: a wood screw that can be used for the attachment of the wooden component and so that can be identified by an associated sufficient identification feature, the associated identification feature being completely retrieveable at at least one location, characterised in that the coding system for each property of the group relating to the mechanical loading capacity: characteristic yield moment, characteristic pull-out parameter, characteristic head pull-through parameter, characteristic tensile capacity and characteristic torsional strength has a sub-code, and the image set of all sub-codes of this group is made up of alphanumerical characters, the representation of each sub-code of this group being given according to a pre-specified rank order, and the rank order being such that an identification feature of the same rank or of a higher rank in comparison with a sufficient identification feature (I≥A) indicating the fulfilment of all set minimum requirements when deciphering with regard to each of the individual (b j) combined elements (b) implies fulfilment of the minimum requirements, and the completely retrievable identification feature being in particular the lowest rank sufficient identification feature. a wood screw that can be used for the attachment of the wooden component and so that can be identified by an associated sufficient identification feature, the associated identification feature being completely retrieveable at at least one location, characterised in that the coding system for each property of the group relating to the mechanical loading capacity: characteristic yield moment, characteristic pull-out parameter, characteristic head pull-through parameter, characteristic tensile capacity and characteristic torsional strength has a sub-code, and the image set of all sub-codes of this group is made up of alphanumerical characters, the representation of each sub-code of this group being given according to a pre-specified rank order, and the rank order being such that an identification feature of the same rank or of a higher rank in comparison with a sufficient identification feature (I≥A) indicating the fulfilment of all set minimum requirements when deciphering with regard to each of the individual (b j) combined elements (b) implies fulfilment of the minimum requirements, and the completely retrievable identification feature being in particular the lowest rank sufficient identification feature.