Structural proposal

Because of the need to maintain a current structural core 2 more systems are tested, that is not as space efficient; however, can be mounted upon the existing structural grid.

The second option tested is the rolled steel truss. This structure typically spans 12 - 45 meters; thereby the current structural grid of 14m. spans is easily achievable. It can be assumed that the L/d ratio would be low regardless of high loading due to the typical spans of the structure. However, based on the principles in the “Metric Handbook” this structure at 14m. spans might not be as financially viable as the following option as it is typically used for larger spans.

The vierendeel girder proves to be the most viable option. With a typical span of 6- 18m. the span in MWR is in the middle of the range meaning this option is likely to be financially viable. This form of a truss is also less deep than the rolled steel truss which is beneficial. The gaps in the truss can be used to run building services. It also addresses all the previously mentioned potential issues.

From the narrative perspective and actual possibilities of implementation, it is obvious that internal insulation is the better option. With the vertical extension (garden) functioning as a greenhouse, the thermal insulation pattern can be wrapped up in the theatre space above the truss system.