STEEL FRAME CONSTRUCTION: DRIVEN BY STEEL: - OneSteel

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300PLUS ® Advertiser & Sunday Mail Building The building was on a tight design and construction schedule with financial penalties for the client if not occupied on time. Because of the medium-rise character of the building, structural engineers, Peter McBean and Loreto Taglienti of Wallbridge & Gilbert, in consultation with the architects, took the decision to use steel as the primary framing material to enable fast erection of the primary elements of the building. That approach meant that the fire-rating of the structure was taken off the critical path. Steel also provided the flexibly for the architecture, allowing for large edge cantilevers – an important part in realising the lightness of structure at the façade. While some of the steelwork was repetitive, other sections were unique. The typical 8.1 metre X 8.1 metre grid comprises OneSteel 300PLUS ® 460UB67 primary and 410UB54 secondary beams acting compositely with the steel-profile decking. Because of the large floor plate size the floorto-ceiling heights of 3 metres are significantly higher than is typical for office buildings. This avoids the horizontal squeezing of the internal view cone that would otherwise occur. The north and south perimeters have been designed to be column free. The 3.5-metre cantilevered floors to the south and in particular to the north also influenced the selection of structural steel framing. On level two (the editorial floor) the client required a larger floor plate so the southern building edge at this level was designed to cantilever 3.6 metres out from the building face. This solution was made possible by large steel cantilever beams, which in turn become part of the visual expression of the building. The north façade in particular required an elegant and minimalist structural solution which could only be achieved through the use of steel. Deflection control of the cantilevered floors was very tight in order to service the façade weather seal. Consequently, Wallbridge & Gilbert considered steel the appropriate solution because of the greater deflection predictability, compared to a concrete structure. echoing the nature of the work within and communicating graphically the power of the use of words. It also provides pedestrian shelter along Waymouth Street and strategically locates the main public and corporate entrances to the building though a series of transition spaces from the public domain of the street and footpath into a lobby, before passing the security point into the building proper. The choice of hollow section columns was innovative as they provided an efficient, cost-effective and time-saving solution. Concrete-filled 400 x 400 x 10.0 Square Hollow Sections (SHS) were used around the perimeter of the building, saving up to 30% in steel mass and fabrication costs. Floor beam connections to the hollow section columns took several forms. Circular Hollow Sections (CHS) columns with simply supported beams were connected by a single line of bolts to a web side plate welded to the column face. Continuous cantilevered beams utilised stub beams welded to the column face with (top and bottom) flanges welded to ring stiffeners around the column perimeter. Bolted moment end plate connections joined the stub beam to the suspended cross beams. The north façade in particular required an elegant and minimalist structural solution which could only be achieved through the use of steel. The glass façade on Waymouth Street. The glass façade has an inner skin curtain wall with an extended glass wall another metre away. This innovative ‘second glass skin’ across the Waymouth Street frontage enlivens the building and integrates the corporate identity within an elegant, well considered façade. Environmentally it provides acoustic and thermal protection and shading as well as creating a distinctive urbane and graphically communicative façade, Perimeter SHS columns were either continuous with web side plate connected beams or, when these beams were cantilevered beyond the column line, discontinuous at every floor with cap and base plates connected to continuous beams. The floors were tied back to the two service cores, laterally bracing the building. Technology was critical to executing the multifaceted design. The integration of the 3D software enabled the exchange OneSteel Solutions issue 8 page
CLIENT Advertiser Newspapers Pty Limited ARCHITECT E.G.O Fender Katsalidis PROJECT MANAGER E.G.O Group STRUCTURAL ENGINEER Wallbridge & Gilbert BUILDING CONTRACTOR Baulderstone Hornibrook STEELWORK CONTRACTOR Manuele Engineers This award-winning, high-profile office building is a demonstration of steel’s design flexibility. STEEL DETAILER USDSA STEEL DISTRIBUTOR OneSteel Steel and Tube; Smorgon Steel Metals Distribution OneSteel Solutions issue 8 page
Page 1 and 2: Construction Solutions in Structura
Page 3 and 4: in the news Composite Analysis Soft
Page 5: 300PLUS ® Ernst & Young Centre The
Page 9 and 10: Latitude East @ World Square E x p
Page 11 and 12: 300PLUS ® Latitude East @ World Sq
Page 13 and 14: Steel frame construction delivers N
Page 15 and 16: 300PLUS ® 50 Lonsdale Street, Melb
Page 17 and 18: DRIVEN BY STEEL SX1 - SOUTHERN CROS
Page 19 and 20: 300PLUS ® Brisbane Airport Steel d
Page 21 and 22: BIG DEVELOPERS COMBINE IN STEEL TO
Page 23 and 24: 300PLUS ® Flinders Link - Adelaide

STEEL FRAME CONSTRUCTION: DRIVEN BY STEEL: - OneSteel

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