Peculiarities of sustainable reliability predictions for load-carrying structures of buildings, construction and civil engineering works are discussed. The quantitative probabilistic parameters of the structural safety and durability of members and their systems are formulated and applied. A new strategy for probability-based quality predictions of sustainable structures is presented. The safety prediction is meant for particular members (sections, connections) exposed to action effects. Contrary to this prediction, the durability issues for whole structural members (slabs, beams, columns, walls) as auto-systems representing their multi-criteria failure mode are considered. The methods of conventional resistance and transformed conditional probability design in practical calculations of reliability parameters of sustainable structures and works are presented. It is recommended to calibrate the target reliability index of sustainable structures considering not only the consequences of failure of the members but also their functional working classes.

A residual survival probability of members and systems of existing structures subjected to extreme service and climate actions is considered. The time-dependent safety margin of particular members (sections, bars, connections) and its modifications as stochastic finite sequences are discussed. The prediction of primary and revised instantaneous and long-term survival probabilities of members is introduced. The effect of deterministic short-term extreme action effects on the values of revised survival probabilities of existing members is based on the concepts of truncated resistance distributions and Bayesian statistical approaches. The revised reliability index of precast concrete floor slabs is considered and demonstrated by the numerical example.

An assessment of structural and technological features in the design methodology of hyperstatic precast reinforced concrete and composite steel-concrete structures is discussed. Permanent and variable service, snow and wind loads of buildings and their extreme values are analysed. Two loading cases of precast reinforced concrete and composite steel-concrete continuous and sway frame beams as propped and unpropped members are considered. A limit state verification of hyperstatic beams by the partial factor and probability-based methods is presented. It is recommended to calculate a long-term survival probability of beams by the analytical method of transformed conditional probabilities.