DBTR2013 - Volumetric unit - (UVL_GPG)

The surface of each building is divided into volumetric units by dividers, or lines of separation between elements of different height and homogeneous plan. Volumetric parts are those that are significant for the purpose of volumetric quantification of the building structure regardless of the inclination and conformation of the roof pitches. The volumetric parts of buildings must be represented if the differences in eaves height are greater than the permissible altimetric tolerance, with the following exclusions: altars, dormers, skylights, terraces obtained in the aquifer, chimneys, chimneys on the roofs and any other element not directly connected with the volume of the building and such as not to identify a building body from sky to earth differentiable from the adjacent ones. Technical volumes protruding from the shape of the roof (elevator compartments, stairwells, central and technological compartments, etc.) should also be excluded if they do not constitute a distinct and autonomous building body.每栋建筑的外表面均由分隔构件或不同高度且平面均质的组成元素间的分隔线，划分为体积单元（volumetric units）。体积部件（volumetric parts）指的是对建筑结构开展体积量化工作具有重要意义的部分，无论屋顶坡面的倾斜角度与构造形式如何。当檐口高度差超出允许的高程公差时，需标注建筑的体积部件，但以下情况除外：祭坛、老虎窗、天窗、蓄水层上的露台、烟囱、屋顶烟囱，以及所有未直接与建筑主体体积相连、且无法从天空到地面界定出与相邻建筑相区别的独立建筑体的其他构件。若从屋面造型突出的功能性体积单元（如电梯机房、楼梯间、中央技术舱室等）未构成独立且自主的建筑体，也应予以排除。