CONSTRUCTING ENVIRONMENTS A02: FULL SIZE - INTERIM SUBMISSION Option 1 - Spanman
Tara Shokouhi 635693
L A The main focus of UR T T my roof is the arch, and P C E this is achieved through the U C R T placement four laminated S ON beams. These willofbe held in place C with strong K.D. Hardwood rafters, one
The two laminated beams between the sides, will be placed on either side of the center window, as if it was placed on the actual windows, they would shatter under the pressure and weight.
running right under the turning point of the arch and one in the corner. Due to the main design of my roof, the two levels and the curved nature, a lot of thought went into the structure and the structural concept of it, how I would approach the construction of the roof and the extra requirements needed to ensure that the roof s strong and does not sag or snap with the weight.
This first diagram here, just above, demonstrate the section of my roof design that are in tension and compression.
The most stressed point here, would be the section under the level divide (that is the rafters with the windows) and this is shown on the diagram below in a dotted line
With the weight of the roof being too much, this section here will be added down the centre of the house, to create a stronger support for the roof.
S L IA R TE A M
My design uses multiple materials. These include the following:
-K.D (Kiln Dried) Hardwood Rafters (load Baring) I chose this type of wood to use as the rafters as it is less prune to shrinkage, long lasting and there is also less chance of buckling or movement. While metal was another option, it is more expensive and also requires more support in the structure, thus it is not utilised. -Laminated Beams Due to the design’s abstract and abnormal shape, the best way to create a beam that can be easily moulded into any shape that is needed, is to use laminated beams. These can be ordered in any shape or form and are strong enough to support the structure. - K.D (Kiln Dried) Structural Beams These are used as the support beams providing a better support for the laminated beams to make the structure stronger. - Roof Battens Pieces of wood that provide the proper spacing for the colour bonding roof to be attached to. - Insulation Batts These are used to insulate the house against heat and cold weather. This goes between the colour bond roof and the plaster ceiling. -Insulation Sheets - Silver wrap Used on top or under the Insulation Batts, to help keep them in place. In my structure it will be used on top of the Batts, as the batts itself are being placed within the spaces of ceiling plaster. The reason for this is because the Insulation batts only work properly when they are not squished, and thus the ceiling battens would keep them in place and stop them from compressing under the above weight. - Colour Bond Roofing Flexible and can be ordered to any shape and colour, and the fact that they come in panels makes it easier to lay. It is also low maintenance, and light, therefore does not require too much support, such as is the problem with concrete roof tiles. - Aluminum Windows Electric windows will be put in place between the two levels of the roof. These will allow for air flow and light in and out of the house. - Timber lintels Placed directly above the windows, to provide additional support. Ideally steal lintel would be a better option, however, given that bricks are not being used and the structure is made up of timber, timber lintels were decided.
CO
NST RU CTI
Starting with the already existing load baring walls of the house, the roof design will be structured on top of the existing structure. To start off with, I will be placing 4 curved laminated beams across the top of the structure, with 2 K.D. hardwood rafters (load baring), going across the top of the curve and the intersection corner between the roof and the wall. The front and back sections of the 4 laminated beams, will have structural beams in place to strengthen the structure. On top of the laminated beams, there will be an alternation between insulator batts and ceiling (or roof) battens, then they will be covered with insulation sheets known as Silver wrap ( Sarking). The reason for placing the insulation batts where they are is so that they will not be compressed, as the air can only circulate around them when they are not compressed, and with the heavy weight of the colour bond, this will indeed be the case. On top of all of this, there will be the layer of colour bond.
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Looking at its surroundings, the area was TH filled with many trees, and that became the S focus of my design. To use the overall look, AE andprimary design of a simple tree in the new roof’s design.
TIO
In analysing the building, I found that there was a lot of straight lines and symmetry within the structure.
C N FU
IC T E
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N G SI
Due to the location of the Murcutt Guest Studio, I had a look at the climate for the area, and found that the roof needed to be able to withstand both extremities, in that, there was a lot of rain and most obviously, a lot of sun and heat.
I didn’t want to do a roof that would appear lop sided, or out of place. I wanted it to be new but still blend in. Almost like a harmonising contrast to the already existing structure and the surrounds.
It was for this reason, that I designed a rood that would allow for a somewhat easy water flow when it rained (for the closed off sections at the bottom of the curves, a gutter will be put in place), a large window on the front and back faces of the roof (to allow for maximum lighting), and also the three smaller windows in between the two roof levels, that would open up, in order to help with the air circuit of the house.