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The main scope of this article is to expose an effective methodology for the investigation in complex accidents that they have happened by structural complex failures, in temporary work equipment that has been used during the building on different construction sites. This methodology is based on real cases, and due to its application and development it has allowed the determination of the technical causes that has induced the mechanism for structural collapsed with the scientific severity that it is necessary in a performance of these characteristics. Accurately by the complexity that it motivates the determination of the technical causes in singular structural failures, as well as the judicial process derived from a serious accident. It is very important that it takes into account the methodology and aspects that it has to comply for what the expert report adapts to the scope and expected expectations, basically so that expert report has the scientific rigor that it allows to demonstrate by unquestioned form the technical causes that has induced the failure. Some main aspects it must to take into account during all the process and for the making of expert report, like; visiting the accident area getting the broken pieces and rest of pieces belonging temporary work equipment or installation; permanent identification and traceability during the manipulation and tests carried out on the recovered pieces, independently of the nature, destructive or not; application of the analytical and experimental assessment methods for understanding the safety conditions of the damaged equipment, previously and in the moment of the accident, finally, an expert report writing in a simple language that allows to the different agents (judge, prosecutor, lawyer, accused) involved on the judicial process, to understand clearly how the mechanism of failure has occurred despite that they have not a technical knowledge about the topic. Resumen En el presente articulo, se describe la metodologia empleada, para la determinacion con rigurosidad cientifica e inequivoca, de las causas tecnicas que han motivado una serie de siniestros, derivados de fallos estructurales, en equipamientos y estructuras de naturaleza metalica. Para ello, y tomando de referencia dos ejemplos reales de investigaciones tecnicas periciales, se especifica la metodologia de investigacion en siniestros de estas caracteristicas, desde el instante del accidente, asi como la importancia de combinar metodos analiticos y experimentales, para la convergencia en las causas tecnicas que han motivado el fallo. Precisamente, por la complejidad que incorpora la determinacion de las causas en fallos estructurales singulares, asi como el proceso judicial derivado de un siniestro grave, es importantisimo tener en cuenta la metodologia y aspectos que se deben cumplir, para que el estudio tecnico pericial y dictamen final, se ajusten al objeto y expectativas previstas, fundamentalmente para que este, disponga del rigor cientifico que permite demostrar de forma incontestable, cuales fueron las causas tecnicas que indujeron los mecanismos de fallo. Asimismo, el articulo desarrolla otros aspectos claves para que una investigacion pericial, se lleve a cabo con la eficacia y exito que requiere, tales como; profundidad en la investigacion; recuperacion y trazabilidad de las piezas fracturadas; estudio del estado del arte, con las metodologias, experiencias, y referencias a nivel internacional, europeo, y/o nacional, amplitud en el conocimiento exhaustivo y detallado sobre los requisitos reglamentarios y normativos de caracter tecnico, que son de aplicacion sobre el sistema/equipamiento/instalacion siniestrada y por ultimo la utilizacion en el informe y dictamen pericial de un lenguaje llano y sencillo, a pesar de tratarse de un siniestro derivado de causas de indole tecnica.

building and management

Assessment methods for determination of the technical causes in accidents specially complex = Métodos de evaluación para determinación de las causas técnicas en sinestros de especial complejidad