Week 9 constructing journal 3D perspective drawings The completed 3D perspective drawing makes the structure much more clear. It is easy to find that the roof section is combined with insulation, plasterboard, steel beam, timber, waterproofing, flashing, fibre cement sheet, joint sealant and purlin. Some parts of the 3D perspective cannot be seen in the drawing such as the timer and insulation items. So many insulation combined with the steel beam are quite useful for avoiding the strong sunlight or heating but it is quite hard for the roof to absorb the heat and easy to be wet. Also, on the left hand side of the drawing, waterproofing and flashing are great designed to prevent the water into the structure. Not enough waterproofing among the structure, instead, plenty of plasterboard are shown in the structure, it is very easy to get wet of the structure. Steel beam takes the responsibility to load the weight of some parts of the roof and could be seen in 3D perspective drawing. On the right bottom, a Z-purlin is shown to support the insulation above and is connected with the plasterboard. Not too many connections among this roof structure. Fibre cement sheet and the joint sealant are the examples of carbon footprint. Steel and insulation are quite high embodied energy of the structure. Items such as steel, fibre and timber could be reused or recycled for sustainability.
Site visit •
During this week’s studio, we did visit the built detailed timber model which is based on our spanman project Murcutt Guest Studio (Kempsey NSW, 1992). The structure was combined with the roof, floor and so on.
overhanging Beams Rafter Top plate Columns
Bottom plate
Spacing
Span
As we can see from the picture, the main elements of the structure are the rafter, beams, columns, span and spacing. All of them are combined with each other and load the weight of the structure. Also, the connection among these elements are very important. From this structure, the most use of the connections are the bolt joint which are threaded metal pins and having the head of one end (Ching, 2008)
Bolt joint connections
The whole structure is made from the timber, as we have learnt before, timber is a quite cheap material and it is good for recyclability and good way for sustainability. And it is quite easy to use the timber to build the structure and can be very stable.