Module 4

Submitted For
Module 4 - Skin and Bones

Working link to your Revit cloud model in Forma Data Management.

Working link to your Individual Forma Board

DF sheet set at D size, 30 by 42 inches, six sheets. Delete any blank sheets.

261020 Gaston Carvajal Building.pdf14 MiB

Screenshot of your Insight result alongside your Week 3 Forma result.

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Design memo of 300 to 400 words: what survived the handoff, what you rebuilt, what assembly choices you made and why, and where Revit and Forma disagreed.

From Forma to Revit a lot survived the export. The massing, the floor plates and the facade came into Revit as native geometry, already geolocated at 37.804° / -122.274°, so I never had to place the building again. The ten levels also came clean at 12 ft floor to floor, matching my Week 3 heights. What did not survive was the inside. I had to build the stairs completely from scratch, because the export brings shape and not circulation, and several interior walls arrived broken, so I rebuilt them one by one. Forma gives you the envelope; anything a person actually uses, you build yourself. The assemblies started with a structural decision. My building is 8 residential floors over the commercial ground floor, and a Type III wood frame over a podium does not reach that high, so I choosed to keep the height and switch to concrete and steel. I made two exterior wall types because the two parts do different work: the podium takes the street, so it is brick over a 1½" air gap, 2½" of rigid insulation and 7⅝" CMU (R-20.8); the upper floors are CMU cladding over a 1½" air gap, 2" of insulation and 7⅝" cast-in-place concrete (R-25.3). Both beat the R-19 minimum. The roof is a terrace at R-30.3, 7" of rigid insulation over a 9" precast deck, chosen over a green roof to give the residents usable outdoor space. The two tools disagree. Forma gave 3.2M kgCO2e with 2.91M embodied; Revit gives 816,015 with 436,077 because Forma estimates a whole building from the massing while Revit counts only what is modeled. Energy went the opposite way: 31 kBtu/ft² in Forma against 148.58 kWh/m² (about 47 kBtu/ft²) in Insight, 52% more. Revit reads my real assemblies instead of a default WWR, so that is the number I trust.