382. Qualified statutory obligations.

Obligations imposed by safety legislation are frequently qualified by the words 'so far as reasonably practicable'1, or 'so far as practicable'2. Each of these phrases affects in a different manner the obligation which it qualifies.

'Reasonably practicable' is a narrower term than 'physically possible' and implies that a computation must be made, before the breach complained of, in which the quantum of risk is placed in one scale and the sacrifice involved in the measures necessary for averting the risk (whether in money, time or trouble) is placed in the other and that, if it be shown that there is