What is a common characteristic of formwork in construction?

Formwork in construction refers to the temporary structures used to hold concrete in place while it sets and gains strength. The correct choice emphasizes that formwork is designed to be temporary. This characteristic is crucial because once the concrete has cured adequately and has reached sufficient strength, the formwork is removed, allowing for the construction of subsequent elements of the building without the constraints imposed by permanent structures.

Temporary formwork allows flexibility in the construction process, as it can be reused multiple times for similar concrete pours, or it can be designed and adjusted on-site to meet the specific needs of a project. It typically consists of materials like plywood, metal, or plastic, tailored to shape the concrete into its desired form before removal.

In contrast, permanent fixtures, such as foundations or walls, are built to last and are integral to the structural stability of a building. Formwork must not necessarily be waterproof, as its primary function is not to contain water but to support the fresh concrete until it hardens. Additionally, while some heavy machinery may be involved in larger projects, formwork can often be installed manually, particularly in smaller installations or more straightforward designs. These considerations further highlight the distinctive characteristics of formwork as a fundamental part of the concrete construction process.