Document ID: chunk:federal_register_of_legislation:F2013L01343:reg:16:p1
Version: federal_register_of_legislation:F2013L01343
Segment Type: reg
Provision Reference: reg 16 (pt 1/51)
Character Range: 197378–201739

16    Accessibility of information on those AAE members who continued their Antarctic associations (Mawson, Davis, Wild, Hurley and Moyes) and/or continued careers in science (Madigan, Webb, Laseron, Stillwell and Kennedy) and in photography (Frank Hurley) (NHL G, H; CHL H)                                                                                                                                                                                                   Good –                                                                                                                                                                                                                                                                                                                                                                                                                                     High
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     Australian Dictionary of Biography entries for 12 key AAE members became available on-line in 2006 (Ainsworth, Davis, Hoadley, Hurley, Hunter, Laseron, Madigan, Mawson, Moyes, Murphy, Stillwell, Watson). All entries emphasise the significance of the AAE experience.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     Eric N Webb is not in the NZ Dictionary of National Biography – 1975 interview (Lennard Bickel) held by the National Library of Australia.

2.9 Pressures on National and Commonwealth Heritage Values

2.9.1 Environmental Pressures

Wind

Cape Denison is perhaps the windiest place on earth at sea level, with an average daily maximum of 71 kph. Gusts and frequent blizzards exceed 100 kph. The greatest single long-term threat to the structures is abrasion from wind-driven snow and ice ('corrasion'), which wears down the surface of softer fabrics such as timber, as well as 'plucking of weathered fibres' on the leeward sides of structures. Abrasion resistance in timber is generally a function of density, but weathering of the surface is probably more significant in determining the loss rate at leeward locations. This is probably the case for the memorial cross where it has been suggested that plucking has removed more timber than corrasion. Further analysis of monitoring data is required to better understand the processes of wind damage in order to develop effective treatments or mitigation measures.

Timbers with a density greater than 800 kg/m3 have good abrasion resistance. Baltic pine, used as cladding on Mawson's Huts, with a density of 550 kg/m3, is relatively susceptible to abrasion. Since its construction, the roof-cladding boards on the edges and corners of the two sections of the Main Hut have weathered at a rate of up to 1 mm every ten years. Because the workshop roof was constructed of thinner boards (16 mm compared to the 25 mm on the living section) it reached a dangerously deteriorated state earlier than the living section roof, and was the first to be over-clad with new timber (Godden Mackay Logan 2001). A similar situation was occurring to the Transit Hut where corrasion had worn down the exposed timber to the point of possible collapse. In 2010 a portal frame was fitted to the inside of the structure to reinforce the structure while still preserving the heritage values of the hut. While the structure itself is now strengthened, the cladding timbers are still subjected to the effects of wind

Wind is also causing the removal of painted lettering on the Transit Hut plinth that states the latitude and