In rectangular building complexes or large construction sites, a construction plan control network composed of squares or rectangles is called a construction grid. Rectangular coordinates can be used for building positioning and layout within the construction grid, facilitating the calculation of survey data and improving survey accuracy.
The layout of the grid should be determined based on the distribution of buildings, roads, and pipelines designed on the site plan, combined with the site's topographical conditions. First, the main axis of the grid is established, then the other grid points are determined.
The layout of the grid should be determined based on the arrangement of various existing and planned buildings, roads, and pipelines on the site plan, combined with the site's topographical conditions. Grids come in square and rectangular forms. When the site area is large, it is often laid out in two levels: the first level can use a cross shape, a square shape, or a grid pattern, followed by a denser grid. Construction grids are suitable for rectangular building complexes or large construction sites.
The grid layout should meet the following requirements: The main axis should be located in the center of the site, parallel or perpendicular to the building axis. The longitudinal and transverse main axes should be strictly orthogonal, and their length should be sufficient to control the entire site. The positioning points of the main axes are called principal points, and there should be no fewer than three principal points on a single main axis for verification. Principal points should be visually connected and appropriately spaced to meet accuracy requirements. Other grid lines should be perpendicular to the main axes, and the grid points should have good visual connection and be appropriately spaced.