Applying the same concepts, maintenance, replacement or repair is "structural" when its purpose and effect are to remedy some "failure on the part of the structure to remain satisfactorily put together". This is, I think, consistent with the approach taken to the meaning of "structural repairs" in relation to buildings as such in cases such as Granada Theatres Ltd v Freehold Investment (Leytonstone) Ltd [1959] 1 Ch 592 and Advance Fitness Corporation Pty Ltd v Bondi Diggers Memorial & Sporting Club Ltd [1999] NSWSC 264 to which counsel for both parties referred. Reference may also be made to what was said by Balmford J - again in relation to a building - in Carbure Pty Ltd v Brile Pty Ltd [2002] VSC 272:
"'the structure' is that part of the total building that supports the loads and stops the building falling down. It should be emphasised that a building may be structurally sound notwithstanding that it shows signs of movement; as by the opening of cracks. Unless such cracks indicate a real and present threat to load bearing integrity, of building failure or collapse, they may be treated as simply cosmetic defect - susceptible of patching, painting or other straight-forward repair."
Also instructive, in this connection, is the decision of the Full Court of the Supreme Court of South Australia in J F Hillam Pty Ltd v Mooney (1988) 48 SASR 381. That case concerned an indoor swimming centre which included two heated pools built into the ground but inside a building. They had on their inside surfaces a particular coating akin to concrete (described as "marblesheen") to "make them safe and acceptable to swimmers". The marblesheen deteriorated and one of the issues for determination was whether its replacement was "a major repair of a structural nature to the premises". King CJ (with whom Jacobs and von Doussa JJ agreed on this aspect) answered the question in the affirmative:
"The swimming pools were undoubtedly part of the structure of the premises. The marblesheen which rendered them usable as swimming pools by providing an appropriate surface must be regarded, to my mind, as part of the structure. The repair or replacement of that marblesheen is therefore a repair of a structural nature."
Returning to the particular case of the pavements, I am satisfied that they are properly to be regarded as "structures". They were put upon the land by a process of construction. Their character, as consisting of a skin or coating of asphalt placed upon a prepared land surface to which a basecourse of aggregate or blue metal had first been added, makes them similar to, although lesser in degree than, the "low attractive brick fence" considered in Durkin v Commonwealth Savings Bank of Australia (unreported, Full Court of the Supreme Court of South Australia, 30 November 1990) where a fence "in which the bricks are cemented to a cement base and to one another by mortar" was held to be a "permanent domestic improvement of a structural nature". In the same way pavements constructed in the way I have described should be characterised as being improvements "of a structural nature". Furthermore, the replacement of the asphalt skin and any missing basecourse that, to adapt the words in the JF Hillam case, made them usable as pavements by providing the necessary hard surface and its support, and, as stated in Hampson v Clyne, was necessary for them to "remain satisfactorily put together", must, in my judgment, amount to maintenance, replacement or repair that is "structural".