Direction - jcgomezz/Building_taxonomy GitHub Wiki

The Direction attribute is intended to identify two principal horizontal directions of the building plan. It is possible to specify different Lateral Load-Resisting System (LLRS) and the corresponding Material of the Lateral Load-Resisting System in two directions called Direction X and Direction Y; these systems are often referred to as Hybrid Systems or Mixed Systems. Where it is possible to specify directions, Direction X is parallel to street, and Direction Y is perpendicular (orthogonal) to street. In some cases, it is not possible to identify Direction X and Direction Y - thus the user can select Unspecified Direction.

Note that other types of hybrid systems can be described by the Hybrid Lateral Load-Resisting System attribute, which should be applied in one of the following cases: a) there is more than one LLRS in the building, but there is no clear distinction between LLRSs in directions X and Y, or b) there is only one LLRS, but two or more materials of the LLRS are used in different portions of the building.

• [DX] Direction X, unspecified direction
• [DY] Direction Y DXP Direction X, parallel to street
• [DY] Direction Y, unspecified direction
• [DYO] Direction Y, orthogonal (perpendicular) to street