Unlike many land surveys, done before buildings or other improvements are added to the land, as-built surveys can be utilized during a construction project or after the construction has been completed. Requested by many industries, as-built show improvements to the land, as they appeared in a particular point of time.
As-built surveys may be used for commercial or residential properties. Surveys are crucial tools in the construction industry from the planning stage to the actual construction and future maintenance. A construction project begins with a site plan or plot plan, laying out the plan for the project from beginning to end. This plan incorporates any conditions already imposed on a given site.
As-built surveys can be conducted several times throughout the duration of a construction project. Their frequency and the number of surveys undertaken depends on the scope of the construction project. The purpose of an as-built survey is to verify to local and state boards that the construction work authorized has been completed according to the same specifications set during the planning stage and shown in the site plan. The as-built survey is most often used to show the building inspector that a project under construction is conforming with zoning regulations. As-built surveys may be required for nearly every type of land project, from roads and trails to utility improvements and building construction.
Accurate as-builts are important not only as a bureaucratic measure. An as-built survey shows exactly what has been completed to date, a useful tool in adjusting the schedule of a large construction project. An as-built survey provides an important tool to manage the building as it is under construction and after it has been completed. As such, they may be requested by the project supervisor or others who are invested in the completion of this project. They may be used to document what has been completed by a specific date or work out payments to contractors, for example. Often they are used to verify the floor plan and evacuation plans, utility and cabling plans, or other subsequent steps in the building process.
Unlike many other land survey types, as-built surveys are often three-dimensional, rather than flat maps. Also known as “field verification of as-existing conditions,” as-built surveys have proven invaluable to those in many different positions responsible for the space in question. As-built surveys can provide the basis for reconciling the drawings and other site plan information against actual field conditions and the work that has been completed to date.
Many forms of construction surveys, including some as-builts, are considered civil engineering. Within the field of as-built surveys, there are several survey types undertaken for very specific purposes. For example, a foundation survey ensures that the foundation is constructed in the right location on the plot of land, and has been built in the manner outlined in the site plan. Once the project is under construction or after it has been finished, a Deformation Survey can determine if it is changing shape or moving over time by creating a three-dimensional image of the structure at two different points in time.
Upon project completion or when assessing existing conditions, an as-built survey provides that final check to make sure construction has gone according to plan or that existing conditions are as described.
To learn more about as built surveys or if you are in need of an as built survey contact Point to Point Land Surveyors today.