Depending on the complexity of the building, this is likely to require a number of different projections, such as plans, sections , and elevations, and may be spread across several different drawings. They may be referred to as ‘location drawings’ as they show the location of various components and assemblies within the overall design, it has showing coordinate point for all structural elements like slab, beam, column, shear wall and stair case. It has showing location of opening with size and reference distance from grid line or column/shear wall/concrete wall or slab edge. It has showing curve of slab edge, radius General arrangement drawings are likely to be prepared at each stage of development of a building design, showing the overall relationship between the main elements and key dimensions. The level of detail will increase as the project progresses and they may need to be supplemented by more detailed drawings, showing specific elements and assemblies. On very simple projects these may be included on the general arrangement drawings themselves, but generally, separate drawings will be required. General arrangement drawings may include references to additional information, such as specifications and detail drawings, however they should not duplicate information included elsewhere as this can become contradictory and may cause confusion. They may also include notation and symbols. It is important that these are consistent with industry standards so that their precise meaning is clear and can be understood. The scale at which drawings are prepared should reflect the level of detail of the information they are required to convey. Different line thicknesses can be used to provide greater clarity for certain elements. They may be drawn to scale by hand, or prepared using Computer Aided Design (CAD) software. However, increasingly, building information modelling (BIM) is being used to create 3 dimensional representations of buildings and their components.