Hello, Revit student here, pardon if question is too easy... How to model such a house (straw bales...

[FacebookGroupMember]

Hello,
Revit student here, pardon if question is too easy...
How to model such a house (straw bales in column-beams structure) without having to draw explicitly each column.
Is it possible to have such a composite wall (with repetitive parts along the path)?
Thanks

[FacebookGroupMember]

Bonjour Patrick!

Nous avons un groupe en français qui pourrait t’intéresser. www.facebook.com/groups/atout.revit

Pour ta question, malheureusement les compostions internes du mur n’apparaissent qu’en masse linéaire, donc ce n’est pas possible d’ajouter les deux éléments sur une même couche.

Par contre, tu peux utiliser d’autres outils si ton projet se veux plus représentatif que BIM. Il y donc des alternatives qui serais pertinentes pour remplacer la structure de bois. Je recommande de garde l’isolant en paille dans la composition générale de Revit.

Tu peux utilises les solives de bois à la verticale, avec un tour de passe passe avec un plan de référence vertical. Ou même encore plus simple, en utilisant un mur rideau. Ou même une famille in situ.

[FacebookGroupMember]

You could do that as a railing but it would have none of the parameters a wall has.

[FacebookGroupMember]

You do know that you have created a wall with a negative fire rating. It will go up in flames in 30 seconds.

[ToanDN]

Curtain walls with straw bale material panels.

[barthbradley]

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@FacebookGroupMember wrote:
You do know that you have created a wall with a negative fire rating. It will go up in flames in 30 seconds.

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Straw bale houses are known for their fire resistance and have been tested showing that they resist fire by up to three times that of conventional homes.

[FacebookGroupMember]

Well... Googling 5s for "straw bale wall fire resistance" shows lots of studies showing excellent results of those walls.
Do not forget they are enclosed by fire resistant finitions like gypsum boards or lime plaster.
Have you spoken with firemen about that? They prefer to work in a biosourced house rather than petrochemical ones because of fumes being much less aggressive and less dangerous for their health...
Those walls are much better in term of fire resistance except one aspect: they are nearly impossible to stop when well engaged.
If a fire declares, you will be safer in a straw bale house (or wood house or other biosourced one) but be prepared to be homeless for a while...
Do not forget that in case of localized fire in a polyurethane foam house, one should decontaminate the entire house from dangerous fumes, but because insurance does not cover for those costs, it is rarely done... you will expose your family.
Its your choice!

[FacebookGroupMember]

Natalia Muñoz Thanks.
I've joined your group 🙂
I will investigate the curtain wall option.
concerning the "in-situ family", will it retain the wall properties (easiness of drawing, openings, etc)
What do mean by "Par contre, tu peux utiliser d’autres outils si ton projet se veux plus représentatif que BIM."? Thanks

[FacebookGroupMember]

Those walls being carbon neutral, they surely be more used in the future. Could Revit developpers make their use easier??

[FacebookGroupMember]

Thad Broom OK so not an option then. Thanks

[FacebookGroupMember]

It looked like you were trying to have an "exposed look" and ignore a fire rated layer or two. You can draw it as if it were insulation and thru notation spec it out. You will have one hell or a time running wiring thru it for electric or ethernet or pipes for plumbing. Not sure how you will deal with the sweating of the pipes. It might be a good sound barrier too. Good luck with your research and the added costs it might incur. I assume that your double studs are 24" on center.

[FacebookGroupMember]

I was saying that how you draw in in plan or in section is essentially like insulation.

[FacebookGroupMember]

Matthew Brooks Robinson Yeah, sorry the photo was misleading. I wanted to show internal structure.
For networks (electric, Ethernet, pipes, plumbing), it is easier to dig into straw bale than into cemented blocks or bricks 🙂 but I prefer to use counter partitions with room for those networks, also for the sweating of the pipes as you mentioned
Regarding costs : 10 times less for material, 3 times more for workforce.
Most of the extra time (workforce) is needed for details to optimize thermal performance, which, one should do also when choosing "passive houses" standards, whatever the materials. One benefit of straw bale is: the simple fact of using them makes the building ahead of current standards in term of comfort: thermal + humidity management + noise. Easier to achieve high performance, next generation buildings.
I must admit, however, that straw bale cannot be used in any climate since humidity is its enemy... it must be used locally where cultivated (another benefit for the planet)

Regarding the modeling, don't you think drawing the inner of the wall being solely insulation might lead to problem for junctions of slabs for example? It also means my IFCs won't be accurate nor representative.