According to IS 800: 2007, in the limit state design of steel structures, the limit state of strength does NOT include:
The acceptable limit for the safety and serviceability requirements before failure is called a limit state.
Limit state of strength is those associated with failures (or imminent failure), under the action of the probable and most unfavorable combination of loads on the structure using the appropriate partial safety factors, which may endanger the safety of life and property. The limit state of strength include
(a) loss of stability/equilibrium of the structure (including the effect of sway where appropriate and overturning) or any of its parts including supports and foundations
(b) strength limits (general yielding, formation of mechanism, rupture of the structure or any of its parts or components)
(c) fatigue (leading to fracture)
(d) brittle fracture
As per section S.2.2.2, IS 800: 2007 corrosion and durability are included in limit states of strength.