Which type of drawing is primarily used for architectural plans?

Orthographic drawing is the type of drawing primarily used for architectural plans because it provides a clear and accurate representation of the dimensions and layout of a structure. This type of drawing involves projecting the different views of the building—typically the floor plan, front elevation, and side elevation—onto a flat surface without distortion. This allows architects, builders, and inspectors to view and analyze the design in a way that accurately reflects the real-world measurements and proportions, which is essential for understanding how the components of the building interact in three-dimensional space.

In contrast, isometric drawings represent three-dimensional objects in a way that allows for depth and perspective but can distort actual measurements. Perspective drawings mimic the way objects appear to the human eye, which can be visually engaging but does not provide the precise detail necessary for constructing a building. Technical drawings encompass a broader range of illustrations used in engineering and design, but they can include various styles and are not exclusively focused on architectural representation. Therefore, orthographic drawings stand out as the most effective choice for conveying the necessary detail in architectural plans.