Final answer:
Sheathing boards are the horizontal pieces attached to the studs in formwork construction, contributing to the structure’s integrity during construction and to the insulation and airtightness of the completed building.
Step-by-step explanation:
Sheathing boards are the horizontal boards attached to the outside of the studs in typical formwork construction. These boards provide a flat surface for the application of materials such as siding, brick, or stucco on the exterior of a building. Formwork construction involves creating molds into which concrete can be poured to form various structures such as walls, floors, and foundations. The sheathing plays a crucial role in maintaining the structural integrity of a building during the construction phase, as it helps keep the formwork in place and can also contribute to the insulation and airtightness of the finished structure.