Working link to your Revit cloud model in Forma Data Management.
Working link to your Individual Forma Board
https://app.autodeskforma.com/board/up_b1ucsl7wxr/board_69f9f659-e4b6-4b0a-a040-1633dd67d743
DF sheet set at D size, 30 by 42 inches, six sheets. Delete any blank sheets.
Screenshot of your Insight result alongside your Week 3 Forma result.
The specifics provided in the Revit model led to significantly higher embodied carbon compared to the rough estimate of the Forma model. Forma provides a very rough estimate of materials, but all materials were defined for the carbon analysis of the Revit model. The Revit model has much higher insulation in the walls than is required, which could contribute to the high embodied carbon. The defaults were used for the wall and floor assemblies, but if more time had been spend on researching materials and customizing these assemblies, the embodied carbon could have been minimized. The Forma estimate of operational carbon was closer the the Revit model output, but was still lower.
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.
This week the Forma model was exported into Revit to begin the detailed modelling. During the handoff, the geolocation, building footprint and facades were successfully transferred. The location data was transferred to Revit, which is very helpful when adding the shading from the sunlight analysis. The facades in Forma were giving an overlap warning for floors two through five, but when transferred to Revit, the issue disappeared and the facades appeared as desired. The floor plan remained intact, including the unit sizes and locations as well as the stairway and elevator locations. The stairway details were corrupted in the transfer, so the railings were incorrectly aligned. Additionally, the tread and riser proportions were not up to code, so the stairway was remodeled in Revit. I chose to use the “brick on CMU” imported from the commercial default building template available in Revit for the commercial ground floor, which also serves as the building’s pedestal. I chose to use the “wood shingle on wood stud” from the residential default building template available in Revit for the upper residential floors. This template needed to be modified to increase the thermal resistance. The thermal layer was changed from softwood to glass fiber batt insulation, which increased the thermal resistance to over two times the requirement. I also used standard floor assemblies (wood joist 10” – wood finish for the residential and modified 4” concrete slab with vinyl for commercial) and standard windows, doors and curtain walls from the default templates. These floor and wall assemblies were selected because they are common for buildings of this type and saved time modelling that was then directed to the green roof. When modelling the green roof, I followed the YouTube tutorial linked in the Forma Board, using the listed material assumptions to match the material properties as closely as I could, since most of the materials required were not available in Revit. The green roof was modelled differently from the way it was done in the Canvas tutorial since I modeled the roof system and the green roof elements as one, while satisfying the roof thermal resistance requirements. The difference between Forma and Revit Carbon insights was drastic. By adding wall assemblies, editing the facades and specifying materials, the embodied carbon increased significantly. In this week’s module, we were informed that the number of floors above the pedestal should not exceed five, but when creating our models in Forma we were told the building could be up to eight stories. I did not have time to completely redo my floor plan, which would have been required if I were to satisfy this new requirement. I have left mine at seven stories, which means I have six residential floors above the concrete pedestal. Next year, this should be mentioned in week one.