Working links to both Arch and Stru models in Forma Data Management.
Working link to your Individual Forma Board
Forma Board and Site Design are shared with the teaching team (Cesar Escalante, Glenn Katz, Juan Bautista Romaniuk, Luis Pablo Trujillo) with View access.
PDF sheet set of Structural Plans, 30 by 42 inches (E1 size)
Classified clash report with counts.
Clash grid, Run 1. 853 groups by architectural element and 372 groups by structural element describe the same 2,183 clashes.
Design memo of 300 to 400 words: which system and why, where the grid fought your architecture, what you changed in the architectural model.
I went with a cast-in-place concrete frame. The tower has seven residential floors over L1, which is past what wood over a podium can do. I also looked at steel, but with a 10 ft floor-to-floor the beams would take too much ceiling height. Concrete gives a thin floor, built-in fire separation, and good sound control between units. In Module 4 I had assumed light-gauge steel for the upper floors. Now LGS is only the non-bearing exterior infill.
The tower floors are 8 in. one-way PT slabs spanning east-west between PT band beams (48x24) on grids 6, 7 and 8. Two concrete cores take all the lateral load. The corridor splits each core into two boxes, so I tied them together with coupling beams over the corridor. The podium only has columns on grids A, C and F, with 24x30 PT girders spanning up to 50 ft. The L4 roof garden carries soil, so I increased those girders to 24x36 and added 12x20 joists at 6 ft o.c. The foundations are spread footings, one combined footing under the paired corridor columns, 4 ft 6 in. mats under the cores, and 5 ft elevator pits.
The grid fought the architecture in a few places. The Forma walls were about 0.3 degrees out of square, so I kept the grid orthogonal and lined it up with the tower, not the podium. My first layout had columns on grids B and E, and they landed in the middle of living rooms. I took them out and let the band beams span about 42 ft from the facade to the corridor. I also moved the corridor columns 1 ft off grid into the demising walls and put grids 6 and 8 on the core walls. The perimeter columns stuck out of the facade, so I pushed them inside the exterior wall and let the slab cantilever past them. The balconies are the main cantilevers.
The first clash run found 2,183 clashes. Most were duplicates or intended overlaps, and only about 80 were real issues. From this I listed what the architecture has to change, and I will make these changes before the final submission. The architectural model will drop its concrete core walls and keep only finish floors, since the structural model now owns both. The elevators will move down into the 5 ft pit, the 502/503 wall will shift onto grid 7, and the units will get ceiling soffits where the band beams drop 16 in. below the slab.