Legends, sections, plans – three magic words in the architectural toolbox. But hand on heart: when was the last time anyone seriously asked themselves what these drawing systems actually do in an age of BIMBIM steht für Building Information Modeling und bezieht sich auf die Erstellung und Verwaltung von dreidimensionalen Computermodellen, die ein Gebäude oder eine Anlage darstellen. BIM wird in der Architekturbranche verwendet, um Planung, Entwurf und Konstruktion von Gebäuden zu verbessern, indem es den Architekten und Ingenieuren ermöglicht, detaillierte und integrierte Modelle..., AI and digital twins? Anyone who believes that plans are just yesterday’s paper is very much mistaken. Because between legend and layer, between analog line and digital data set, nothing less than the future of the built world is being decided. Welcome to the realm of sign systems – where clarity, control and chaos lie close together.
- Drawing systems are the backbone of all architectural communication – both analog and digital.
- Legends, sections and plans translate designs into readable, verifiable and buildable information.
- Digitization and BIMBIM steht für Building Information Modeling und bezieht sich auf die Erstellung und Verwaltung von dreidimensionalen Computermodellen, die ein Gebäude oder eine Anlage darstellen. BIM wird in der Architekturbranche verwendet, um Planung, Entwurf und Konstruktion von Gebäuden zu verbessern, indem es den Architekten und Ingenieuren ermöglicht, detaillierte und integrierte Modelle... are radically changing the language of drawings – from lines to data objects.
- Interface problems, standards and software landscapes demand technical expertise and adaptability.
- Sustainable planning stands and falls with clean, consistent drawing coding.
- Switzerland, Austria and Germany are focusing on standardization, but are falling behind the international pioneers.
- Criticism is sparked by growing complexity, a lack of transparency and the risk of losing the drawing as a thought process.
- Global trends such as AI and parametrics demand a radical rethink in the communication and use of drawing systems.
- Vision: Drawing systems as dynamic, collaborative knowledge platforms for a sustainable building culture.
From ink to data: The evolution of drawing systems
When you open an architectural plan today, you are holding more than just a technical sketch in your hand. Every line, every symbol, every hatching is part of a system that has evolved over decades. In Germany, Austria and Switzerland, these systems have evolved from the need to translate complex building projects into clear, comprehensible information. The classic legend is the key to legibility: it assigns hatchings, line thicknesses and symbols and turns a chaotic line into an international language. However, the picture has changed dramatically with digitalization. Today, plans are rarely created on the drawing board, but almost exclusively on the computer. Programs such as AutoCAD, ArchiCAD or Revit have replaced the pencil with a mouse and algorithm. Drawing systems have not disappeared as a result, but they have been transformed into data structures. The section is no longer just an imaginary plane through the building, but a parametric element with attributes that is updated in real time as soon as the design changes. The legend remains, but it is often a dynamic layer that communicates with the database. In Switzerland, CADCAD steht für Computer-aided Design und bezieht sich auf den Einsatz von Computertechnologie für die Erstellung und Modifikation von Designs und technischen Zeichnungen. Es ermöglicht eine verbesserte Präzision und Effizienz bei der Konstruktion von Gebäuden und anderen Produkten. CAD steht für Computer-Aided Design und beschreibt die Erstellung von technischen Zeichnungen,... standards such as SIA 2013 or the CRB standards have become established; in Germany, DIN 1356 ensures a minimum level of order. Austria relies on ÖNORM A 6240, but the proliferation of software and individual office cultures continues to cause misunderstandings – from building application to execution. Anyone who does not know how to read and write drawing systems has long since lost out in the international planning process. And that doesn’t just apply to trainees.
But the evolution is accelerating. With Building Information ModelingBuilding Information Modeling (BIM) bezieht sich auf den Prozess des Erstellens und Verwalten von digitalen Informationen über ein Gebäudeprojekt. Es ermöglicht eine effiziente Zusammenarbeit zwischen verschiedenen Beteiligten und verbessert die Planung, Konstruktion und Verwaltung von Gebäuden. (BIMBIM steht für Building Information Modeling und bezieht sich auf die Erstellung und Verwaltung von dreidimensionalen Computermodellen, die ein Gebäude oder eine Anlage darstellen. BIM wird in der Architekturbranche verwendet, um Planung, Entwurf und Konstruktion von Gebäuden zu verbessern, indem es den Architekten und Ingenieuren ermöglicht, detaillierte und integrierte Modelle...), the plan becomes a digital image of the building, in which each component is a data object with numerous parameters. The legend moves from the edge of the paper to the user interface; sections are no longer drawn, but generated with a click. This sounds like efficiency, but it causes new problems. After all, comprehensibility for everyone involved – from the client to the structural engineer to the craftsman – must still be guaranteed. Anyone who believes that BIMBIM steht für Building Information Modeling und bezieht sich auf die Erstellung und Verwaltung von dreidimensionalen Computermodellen, die ein Gebäude oder eine Anlage darstellen. BIM wird in der Architekturbranche verwendet, um Planung, Entwurf und Konstruktion von Gebäuden zu verbessern, indem es den Architekten und Ingenieuren ermöglicht, detaillierte und integrierte Modelle... will make traditional sign language superfluous is doubly mistaken. Firstly, because paper plans still count on the construction site. Secondly, because clean coding of information is more important than ever. Without standardized sign systems, the digital model becomes a black box and communication a disaster. The challenge is therefore to transfer old virtues into new tools without losing control of your own designs. And not to despair at the complexity.
Another problem area is the interfaces. Anyone who has ever tried to marry an ArchiCAD model with a Revit model knows that things are rarely romantic. Different layer structures, symbol libraries and scale concepts lead to data loss, misinterpretation and frustration. In Switzerland, attempts are being made to counteract this with clear standardization. Germany relies on the VDI guidelines and the BIMBIM steht für Building Information Modeling und bezieht sich auf die Erstellung und Verwaltung von dreidimensionalen Computermodellen, die ein Gebäude oder eine Anlage darstellen. BIM wird in der Architekturbranche verwendet, um Planung, Entwurf und Konstruktion von Gebäuden zu verbessern, indem es den Architekten und Ingenieuren ermöglicht, detaillierte und integrierte Modelle... guideline. Austria is experimenting with its own solutions. But international exchange remains difficult. Planners who work in several countries need technical flair and the willingness to constantly learn new drawing systems. The vision of borderless, digital collaboration is still a long way off.
Yet sign language is far more than just a tool. It is also a filterFilter: Ein Material, das bestimmte Wellenlängen oder Frequenzen von Licht oder anderen Strahlungen blockiert oder durchlässt. that decides which information is visible – and which is not. Whoever controls the legend controls the knowledge. This opens the door to manipulation, deliberate omissions and creative reinterpretations. The apparent objectivity of the plan is often an illusion. Especially in competitions and building applications, every symbol is fought over. The symbol systems are therefore always a political issue – and an instrument of power. It is no coincidence that architectural researchers have long been calling for more transparency and comprehensibility in the coding of plans. Because where unclear legends prevail, chaos reigns.
At the end of the day, the question remains: what is the point of drawing systems today? The answer is both sobering and encouraging. They are the invisible backbone of architecture – whether ink or database. Those who master them can translate ideas into built reality. Those who ignore them quickly end up on the sidelines. And anyone who believes that AI and digitalization will take care of everything will be proven wrong by reality. Sign systems are and will remain the language of architecture – even in the age of algorithms.
Legend, section and plan: the trinity of comprehensibility
Without a legend there is no plan, without a section there is no space, without a plan there is no architecture. So simple, so brutal. The legend is the decoding tool that makes the plan comprehensible in the firstFirst - Der höchste Punkt des Dachs, an dem sich die beiden Giebel treffen. place. It indicates which hatching stands for which building material, which line means which wall and which symbol stands for which door. It is the dictionary between design and execution. In Germany, Austria and Switzerland, the requirements for legends are clearly regulated. DIN, ÖNORM and SIA prescribe minimum standards. But anyone who has ever checked a building application knows that reality is more creative than any standard. Sometimes the legend is missing completely, sometimes it is incomplete, sometimes it contradicts the rest of the plan. This leads to unnecessary queries, delays and, in the worst case, structural damage.
The section, on the other hand, is not just a technical detail, but a tool for thinking. It shows how a building is constructed, how rooms relate to each other, how heights and depths function. In the digital age, the section is more than just a line – it is a data query. With BIMBIM steht für Building Information Modeling und bezieht sich auf die Erstellung und Verwaltung von dreidimensionalen Computermodellen, die ein Gebäude oder eine Anlage darstellen. BIM wird in der Architekturbranche verwendet, um Planung, Entwurf und Konstruktion von Gebäuden zu verbessern, indem es den Architekten und Ingenieuren ermöglicht, detaillierte und integrierte Modelle... software, every section can be adjusted in a matter of seconds. Sounds like progress, but there are also risks. If you don’t understand the cutting process, you quickly produce incorrect representations. Control over proportions, materials and details is lost when the algorithm takes over. This is why an understanding of the cut as a thought process remains essential – even if the software can do everything.
Finally, the plan is the big picture. It bundles information, coordinates trades and ensures that designs become built reality. In Germany, the execution plan dominates, in Switzerland the work plan, in Austria the submission plan. But the following applies everywhere: the plan is only as good as its drawing system. Errors in the legend or in the section lead to misinterpretations on the construction site. This costs money, time and nerves. Anyone who believes that digital plans are automatically error-free has not understood the principle. Only clean, consistent character coding guarantees that the plan fulfills its task.
Digitization exacerbates the problem. With every new software, every new update, the risk of drawing systems drifting apart increases. Different scales, layers, symbols and color codes cause confusion. The problem is exacerbated in international projects because every nation has its own standards. If you don’t keep up to date, you lose the overview. Technical knowledge of sign systems therefore becomes a key qualification. Planners must not only design, but also code, check and harmonize. Without these skills, professional practice is unthinkable today.
And then there is the issue of sustainability. Anyone who believes that drawing systems have nothing to do with this is very much mistaken. Only when building materials, constructions and technical systems are clearly coded can life cycle assessments, deconstruction concepts and material cycles be understood. The legend becomes a sustainability tool. The section shows where insulation is located and how energy flows. The plan documents what is being built – and what can be dismantled later. Anyone who draws sloppily is not planning for sustainability. Drawing systems are therefore not only a means of communication, but also control instruments for a sustainable building culture.
Digitalization, BIM and AI: drawing systems put to the test
Digitalization has radically changed drawing. The analog plan has become a digital model, the legend a data protocol. BIMBIM steht für Building Information Modeling und bezieht sich auf die Erstellung und Verwaltung von dreidimensionalen Computermodellen, die ein Gebäude oder eine Anlage darstellen. BIM wird in der Architekturbranche verwendet, um Planung, Entwurf und Konstruktion von Gebäuden zu verbessern, indem es den Architekten und Ingenieuren ermöglicht, detaillierte und integrierte Modelle... promises to bundle all information in a central model. But the reality is less glorious. Different software ecosystems, incompatible data formats and contradictory layer structures cause chaos. Anyone who believes that BIMBIM steht für Building Information Modeling und bezieht sich auf die Erstellung und Verwaltung von dreidimensionalen Computermodellen, die ein Gebäude oder eine Anlage darstellen. BIM wird in der Architekturbranche verwendet, um Planung, Entwurf und Konstruktion von Gebäuden zu verbessern, indem es den Architekten und Ingenieuren ermöglicht, detaillierte und integrierte Modelle... will automatically standardize the sign language has never done the practical test. Instead, new misunderstandings arise because each player maintains their own sign system. The battle for the correct coding has become an ongoing task.
In Germany, Austria and Switzerland, standardization is a tough struggle. DIN 1356, ÖNORM and SIA standards attempt to set a framework. But opinions differ when it comes to the color coding of cables, the hatching of building materials or the definition of layers. Global software providers take little interest in national peculiarities. The result: planners have to constantly switch between different drawing systems, import, export and adapt. The sources of error are legion.
AI is now the next revolution on the horizon. Algorithms can automatically generate plans, optimize sections and pull legends from databases. This sounds like a gain in efficiency, but there are risks involved. This is because AI can only work with the data that is available to it. Incorrect or inconsistent character encoding leads to incorrect results. If you lose control of the character systems, you let the machine do the thinking. This is dangerous, because architecture is more than just an algorithm. It is a creative, iterative process that requires precision and interpretation in equal measure.
Another problem with digitalization is the lack of transparency. Where every plan used to be comprehensible, many decisions now disappear into software black boxes. The classic plan was an open document that anyone with a little specialist knowledge could understand. The digital model, on the other hand, can often only be read with special software. The legend is hidden, the cut is an algorithmic product. This makes control, communication and error prevention more difficult. Those without digital skills are left out.
But there are also rays of hope. Open BIMOpen BIM: Dies ist ein Konzept, bei dem verschiedene Software-Programme gemeinsam genutzt werden, um ein BIM-Modell zu erstellen. Die verschiedenen Programme sollten dabei miteinander kommunizieren können, um einen reibungslosen Arbeitsablauf zu gewährleisten. initiatives, open data formats and collaborative platforms promise greater transparency and interoperability. In Switzerland, the focus is on IFCIFC steht für "Industry Foundation Classes". Dabei handelt es sich um ein offenes Dateiformat für den Austausch von Gebäudemodellen zwischen verschiedenen Softwareprodukten. standards, in Austria on shared data rooms and in Germany on the promotion of open interfaces. The hope is that drawing systems will become a common language, not exclusive expert knowledge. But there is still a long way to go. One thing is clear: those who see digitalization as an opportunity and constantly expand their technical knowledge will remain capable of acting. Those who rely on old habits will be overrun by developments.
Interfaces, standards and disputes – the global discourse
Sign systems have long been part of an international discourse. Anyone working in international teams encounters a colorful variety of symbols, layer structures and legends. In Scandinavia, minimalist plans dominate, in southern Europe bright colors and creative hatching. The USA relies on its own CADCAD steht für Computer-aided Design und bezieht sich auf den Einsatz von Computertechnologie für die Erstellung und Modifikation von Designs und technischen Zeichnungen. Es ermöglicht eine verbesserte Präzision und Effizienz bei der Konstruktion von Gebäuden und anderen Produkten. CAD steht für Computer-Aided Design und beschreibt die Erstellung von technischen Zeichnungen,... standards, Asia on parametric modeling. The result: every plan becomes a translation problem. The hope for universal standards is as old as CADCAD steht für Computer-aided Design und bezieht sich auf den Einsatz von Computertechnologie für die Erstellung und Modifikation von Designs und technischen Zeichnungen. Es ermöglicht eine verbesserte Präzision und Effizienz bei der Konstruktion von Gebäuden und anderen Produkten. CAD steht für Computer-Aided Design und beschreibt die Erstellung von technischen Zeichnungen,... itself – and so far just as unfulfilled. Initiatives such as buildingSMARTbuildingSMART ist ein internationales Netzwerk von Experten, die sich für die Förderung der Interoperabilität und offenen Standards für BIM-Technologien einsetzen. Ziel ist es, die Effizienz und Zusammenarbeit in der Bauindustrie zu verbessern und Kosten zu reduzieren. are trying to create global interfaces. But the proliferation remains.
In German-speaking countries, people stick to tried and tested standards – for good reason. They ensure quality, liability and traceability. But they are also a stumbling block for innovation. Those who cling too rigidly to old systems miss out on the opportunities of digitalization. The debate about open interfaces, flexible sign systems and collaborative platforms is therefore in full swing. Critics warn of growing complexity and the danger of losing drawing as a thought process. Proponents see new technologies as an opportunity to avoid planning errors and improve communication.
Another contentious issue is the commercialization of drawing systems. Whoever has control over symbols, layers and coding can dominate markets and working methods. Proprietary software solutions try to impose their own systems and tie planners to specific platforms. This hinders collaboration, makes projects more expensive and jeopardizes the independence of the industry. The demand for open, transparentTransparent: Transparent bezeichnet den Zustand von Materialien, die durchsichtig sind und das Durchdringen von Licht zulassen. Glas ist ein typisches Beispiel für transparente Materialien. drawing systems is therefore growing louder – not only for idealistic reasons, but also for economic ones.
The global discourse shows that sign systems are more than just a technical issue. They are a reflection of building culture, working methods and social expectations. Those who understand them can pick up on global trends and adapt them locally. Those who ignore them remain trapped in national pettiness. The challenge is to create standards that are flexible enough for innovation and stable enough for reliability. This is not a contradiction, but the core of professionalization.
And finally, it’s about the vision: sign systems as dynamic, collaborative knowledge platforms. In an ideal world, plans, sections and legends are not static, but adaptive. They adapt, storeStore: Ein Fenster- oder Türbeschattungssystem, das aus einem Stück Stoff, Jalousien oder Lamellen besteht. experiences and make knowledge accessible to everyone. The technology is there – all that is missing is the will to use it sensibly. Those who recognize and shape the potential will shape the architecture of the future. Those who wait and see will be overrun by developments.
Sign systems as the key to sustainable and digital building culture
The sustainability debate has long since reached sign systems. If you want to build in a resource-efficient way today, you need to know what, how and where to build. Only clear, consistent sign codes enable life cycle assessments, material passports and deconstruction concepts. The legend is the data register of sustainability. The section shows how much insulation, concrete or wood is used. The plan documents which systems interact with each other. Sloppy coding prevents a sustainable building culture – no matter how green the design appears on paper.
Digital tools open up new possibilities. With BIMBIM steht für Building Information Modeling und bezieht sich auf die Erstellung und Verwaltung von dreidimensionalen Computermodellen, die ein Gebäude oder eine Anlage darstellen. BIM wird in der Architekturbranche verwendet, um Planung, Entwurf und Konstruktion von Gebäuden zu verbessern, indem es den Architekten und Ingenieuren ermöglicht, detaillierte und integrierte Modelle..., AI and databases, material flows, energy consumption and carbon footprints can be simulated in real time. But this only works if the drawing systems are properly structured. Any error in the coding becomes a sustainability risk. Anyone who is serious about sustainable architecture must see drawing systems as part of the design process – not as a choreChore: Die Chore bezieht sich in der Architektur auf die Anordnung von Fenstern, Türen und anderen Elementen in einem Gebäude. Sie beschreibt die räumliche Verteilung und Ausrichtung dieser Öffnungen und hat Einfluss auf die Lichtverhältnisse und Belüftung im Inneren des Gebäudes.. The integration of sustainability data in plans, sections and legends is state of the art today. Those who ignore this are wasting potential.
Communication also benefits. Clearly coded plans make sustainable solutions understandable – for clients, authorities and tradespeople. Misunderstandings are reduced, errors avoided and costs saved. This has long been part of everyday life in Switzerland, where life cycle assessments are shown directly in the work plan and material passports are part of the legend. Germany and Austria are following suit, but there is still a long way to go. Without clear sign systems, sustainability remains lip service.
Digitalization is increasing the pressure to act. Those without digital skills are left out in the cold. Those who don’t know standards make mistakes. The future belongs to those who have mastered both: the classic sign language and digital tools. The combination of tradition and innovation is the key. Those who internalize this can master the challenges of sustainability – and make building culture fit for the future.
In the end, it becomes clear that sign systems are far more than just technical aids. They are the key to sustainable, digital and collaborative architecture. Those who understand them can shape the future. Those who ignore them are stuck in the past. The building culture of tomorrow will not be decided on the drawing board, but in the interplay of plan, section and legend – digitally, transparently and sustainably.
Conclusion: Between clarity and complexity – sign systems as a code for the future
Drawing systems are the silent backbone of architecture. They translate ideas into buildable reality, ensure comprehensibility and enable innovation. Digitalization presents them with new challenges – from BIMBIM steht für Building Information Modeling und bezieht sich auf die Erstellung und Verwaltung von dreidimensionalen Computermodellen, die ein Gebäude oder eine Anlage darstellen. BIM wird in der Architekturbranche verwendet, um Planung, Entwurf und Konstruktion von Gebäuden zu verbessern, indem es den Architekten und Ingenieuren ermöglicht, detaillierte und integrierte Modelle... to AI, from open interfaces to sustainability. Anyone who wants to be successful as a planner, engineer or client today must understand drawing systems as a dynamic, adaptive system. It is no longer enough to know standards by heart. You need technical understanding, adaptability and the will to collaborate. The future of architecture will not be decided by the question of whether analog or digital drawings are used. It will be decided by how cleverly, consistently and openly we deal with our drawing systems. Those who understand this will turn lines and symbols into the building blocks of a sustainable building culture. The rest? Keep drawing in the fog.