To reliably calibrate suitable partial safety factors, useful for the specification of global condition describing structural safety level in considered design case, usually the evaluation of adequate failure probability is necessary. In accidental fire situation, not only probability of the collapse of load-bearing structure, but also another probability related to the people staying in a building at the moment of fire occurence should be assessed. Those values are different one from another in qualitative sense but they are coupled because they are determined by similar factors. The first one is the conditional probability with the condition that fire has already occured, whereas the second is the probability of failure in case of a potential fire, which can take place in the examined building compartment, but its ignition has not yet appeared. An engineering approach to estimate such both probabilities is presented and widely discussed in the article.
Villa architecture after 1914 comprises a diverse and extensive group of buildings. The lack of a system of valuating them leads to their analyses being a time-consuming and complex process. Their justification can refer primarily to architectural and urban planning tendencies, including: the impact on the space of previously built estates, the assessment of the quality of their architecture in the landscape context and the continuity of design traditions, contemporary interventions associated with renovation work. The protection of villas from the interwar period, appears to be particularly important. Their cultural value and the quality of the landscape, that they co-create with their accompanying gardens is highly significant to the identity of the city.