‘On Site’ Take Two
Constructing Environments Maxwell Bracher 636699
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1 Constructing Environments Maxwell Bracher 636699
MASONRY BLOCK CONSTRUCTION
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External waterproofing membrane Masonry block Xypex waterproofing admixture Concrete
RETAINING WALL Originally designed to be filled with soil, instead will be filled with concrete. Steel reinforcing bars protrude from ground to reinforce concrete block wall. These bars are 12mm in diameter. Extend for significant depth below ground level, as pavilion change rooms are below ground. A masonry block retaining wall would have starter bars every 400mm. Horizontal bars approximately every second course.
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Constructing Environments Maxwell Bracher 636699
FROM THE BOUNDARY LINE... Oval falls away to a concrete spoon drain immediately at the boundary of the turf. Behind, and beneath the ground is an agricultural drain, with small incisions to allow drainage from surrounding soil. Agricultural drains are always installed below the footings, allowing water to flow past the junction between wall and footings. Followed by a masonry block retaining wall, reinforced with 12mm reinforcing bars (refer previous page). Directly behind the retaining wall is a narrow paved area, stepping up to concrete seating area. Seats panelled in treated hardwood timber.
In the foreground is laminated veneer lumber. Light, cheap, and resistant, this material is used for bearers and strong backs, supporting formply in the casting of concrete formwork
Treated hardwood panelled concrete seating Paving Retaining wall Agricultural drain Spoon drain Playing surface
Constructing Environments Maxwell Bracher 636699
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DETAIL Agricultural drain: A black unplasticised polyvinyl chloride (UPVC) coiled, flexible pipe that is installed beneath ground level to allow drainage of waterlogged soil (A New House, 2012). Commonly known as an ‘aggi drain’, they are manufactured with small slits to allow water to seep into them.
See top right
Xypex: A waterproofing admixture that impregnates concrete by filling small gaps and expanding as it sets.
Lost formwork: A means of casting concrete forms using formply that is ultimately lost to the setting process. The process is such that once the concrete has set, it is impossible to remove the formply. In the pavilion’s context, this is how the grandstand is fabricated. See bottom right
Constructing Environments Maxwell Bracher 636699
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Painted steel universal beam (with additional flange for securing to timber column) Laminated timber column (4x) Galvanised bolts securing beam to column.
VERTICAL MEMBERS Four laminated timber columns are all that will support the weight of the roof. Directly connected to steel universal beams via a flange, a groove in the timber and galvanised bolts. During construction, these are supplemented by a pair of acro-props per column. Using two ensures against bending. Full-height toughened glass is secured by aluminium mullions. The mullions, window head, and sill are all the same member (above). They form a portal frame. Mullions are structural members, the glazing is not. It is self-supporting.
Constructing Environments Maxwell Bracher 636699
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THE “CLOCK TOWER” Clad in black tongue and groove hardwood timber panelling. Tongue and groove allows for hidden fixing of panels to frame. Nail is hammered through the ‘tongue’, and covered by the corresponding groove. See below
Because of the cleft left between each board, this type of tongue and groove can only be used for cladding, not flooring. The western wall has a window inserted into it. Aluminium louvres are installed in the eastern wall. The entire tower is clad in tongue and groove hardwood timber. The opening for the louvres and fireplace (at the bottom of the tower) are edged with aluminium angles.
Constructing Environments Maxwell Bracher 636699
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louvres
Roof structure is different from typical construction: (see right) Roof cladding Batten Bluetongue flooring Purlin In the pavilion, Z-purlins are used instead of C-purlins (see below). This is a design decsion based on the ceiling design. Z-purlins have the ability to overlap, C-purlins form butt-joints. The Z-purlins are of galvanised steel, and are secondary members. Most galvanised purlins today are sourced from China, made from recycled steel. They are not as strong as they used to be, due to overrecycling of materials.
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Internal walls are 25mm higher than external walls, with termiteproof membrane installed.
Toughened glass
Compressed fibre cement sheeting
The rear (north) walls are braced with ply to limit shaking. Modern domestic construction often used ply bracing.
Constructing Environments Maxwell Bracher 636699
Brick veneer
Progress Week 1 - Week 10
Constructing Environments Maxwell Bracher 636699
BIBLIOGRAPHY
Xpex Product Range 2010, [Homepage of Xypex Australia], [Online]. Available: http://www. xypex.com.au/Xypex-Product-Range.html [2013, 12/10]. Ashworth, B. 2012, Agricultural Drains [Homepage of A New House], [Online]. Available: http://www.anewhouse.com.au/2012/06/agricultural-drains/ [2013, 12/10]. Fitzgerald, J. 2011, 23/11/2011-last update, What is uPVC? [Homepage of hipages.com.au], [Online]. Available: http://www.homeimprovementpages.com.au/article/what_is_upvc [2013, 12/10].
Constructing Environments Maxwell Bracher 636699