So under few drawings, it gives short descriptions of the drawings you see. “(P. 43) curtain wall details: gable of the top of the tower”. Number 8 is the gable detail @ vertical wall intersection, this is showing the gladding when it goes from the angled faces to the flat vertical faces on the crown of the tower. 7 says gable detail, showing the glass and metal mullion design. 6 says ridge detail, where two gabled meet to make a point. 9 says valley detail, where the gabled meet at lower elevations. Section 4 is not labled, but shows a cutaway of the glass gable on top as it includes the tube mullions and mirrored light beams for the decorative lighting. Section 3 is also a cut away of the gables, but the first set of gables that include the stone cladding. Section 2 is an elevation showing how the glass, stone, and metal meet the steel structure of the crown, while section 1 shows the facade connecting to the floors clad with stone.
In buildings like Chicago’s WIllis Tower, modern skyscraper construction methods involve a steel skeleton structure to distribute weight across the vertical beams that support the whole . These beams are riveted end-to-end to form vertical columns, which are connected to horizontal girder beams.
That elevation is highlighting the slabs and outrigger systems in the Travelstead Tower. You actually can see the core in the diagram, and is slims up at the top, but I assume the core is missing at the bottome for massive open space?
This isn’t really an elevation more than it is a section, but it’s also not a full section drawing. It’s more of a schematic diagram than either of the two. The core bracing is only shown on the top 1/4 of the drawing, what is seen below that is not the core, its the exterior bracing scheme and what is seen on the bottom 1/4 of the drawing doesn’t show the core nor vertical supports and probably is just showing the distribution of floors at the base. The diagram is showing multiple things in one drawing (also the outline and form hard lines), it is not a continuous drawing as one would normally see.
Well comparatively with 270 Park Avenues 2.5 million sqft vs the Chanin Buildings 800K sqft and based on their timelines, 270 is going about 2x’s slower.
