Construction drawing is a common graphic representation in the construction industry. NL is a shorthand that often appears in construction drawings. NL stands for Naturstein Legerichtung (natural stone laying direction). In architectural design, the laying direction of natural stone is a very important consideration, which is directly related to the appearance of the building and the efficiency of material use. Therefore, the word NL often appears in construction drawings.

Architectural appearance design is a very important task in architectural design. The application of NL in architectural design is particularly important. Different NL directions may produce different visual effects, which can enhance the design sense and texture of the architectural appearance. Architects need to determine the choice and direction of NL according to the specific needs and design effects when designing. This is very important for the design and implementation of architectural appearance.

NL is widely used in construction engineering. In the process of building construction, it is necessary to install and lay stones according to NL on the construction drawing. If NL is not selected properly, it may lead to poor appearance of the building and even affect the service life and safety of the building. Therefore, in the construction project, the choice and direction of NL is very critical, which requires rational analysis and scientific decision-making. Only by ensuring the correct selection and application of NL can the quality and practicability of construction projects be guaranteed.