week 7 constructing
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Week 7 Constructing This week we explored different roofing systems; the three materials that we use as a roof are steel, tiling and concrete.
This is an example of corrugated iron roofing, which is a commonly used roofing type. This roofing type is quick easy and relatively cheap to install.
This is also a second common roofing type, tiling. This is however pretty costly and requires a lot of time and labor to install
We also went on a site visit to gain some real world knowledge to apply what we have been learning about, firstly we looked at the foundations of a building and how they start at ground level and work downwards until they get to the bottom of the basement level. They do this by first digging a trench around the entire building block and then pouring concrete into it and letting that set. Once this happens earthworks begin as they start to dig down underneath the trench and then form insitu concrete columns using a technique called shotcrete. Once these columns are set, formwork and steel bars are erected between the columns to form concrete walls and again add to the structural wall supports of the building.
Trenches that are used to start foundations Columns that are added to at 1.5m at a time, and then shotcrete is formed in between.
Spraying the concrete into the steel cage to form reinforced concrete to make the basement walls.
In the basement of the second building site we were able to see the use of bondek to support a concrete slab to span the ceiling of the carpark and to support the next floor. Bondek supports the concrete whilst it is setting and then it becomes another way to improve the concrete slab which is poor in tension. This is a good example of how formwork is used when a concrete slab is poured to support it until it hardens enough so that it will support it self when the formwork is removed.