Designed & Detailed to BS 8110
BS 8110 and limit state
cobjective To serve its
purpose, design a structure must be safe against collapse
and be serviceable in use. Calculations alone do not
durable structures. Equally important are the produce safe, serviceable and
suitability of the materials, quality control and supervision of the
workmanship. Limit state through design admits that a structure may
a number of against defined limits of become unsatisfactory
ways which all have to be considered independently
satisfactory behaviour. It admits that there is an inherent
variability in loads, materials and methods of
and construction which makes it impossible design
to achieve complete safety against any possible shortcoming. By providing sufficient
of limit state will design is to provide
perform satisfactorily during an margins of safety, the aim
acceptable probability that the structure
its intended life. Limit states can he classified into two main (I) groups:
the ultimate limit state, which is concerned with the adequate safety; (2) the
serviceability durability. Generally, in practice, limit states, which are
provision of essentially concerned with there are three limit states which are
normally considered for reinforced concrete and these are given in the Table below.
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