Floor joists are structural components that support the weight of the floor and any loads placed on it. They are typically attached to the subfloor or framing of the building, not directly to drywall. Drywall, also known as gypsum board or plasterboard, is used for interior wall and ceiling finishes, not for structural support.
To install floor joists properly, follow these general steps:
Prepare the Space: Ensure the area where the floor joists will be installed is clean and free from any debris or obstructions.
Determine Layout: Plan the layout of the floor joists based on the building's design and the load requirements. The spacing between the joists depends on the type of floor system and the building codes in your area.
Mark Joist Positions: Use a chalk line or laser level to mark the positions of the floor joists on the subfloor or top plate of the wall.
Install Rim Joists: Start by installing rim joists along the perimeter of the floor. These are typically larger joists that create the outer edges of the floor frame.
Attach Floor Joists: Secure the floor joists to the rim joists using joist hangers or joist connectors. Joist hangers are metal brackets that attach to the rim joists and cradle the floor joists, providing a strong connection.
Use Appropriate Fasteners: Use nails or screws specifically designed for the joist hangers you are using. These fasteners should be strong enough to hold the weight of the floor and any loads placed on it.
Level and Square: Ensure that the floor joists are level and square to create a stable and even surface for the subfloor.
Add Subflooring: Once the floor joists are securely in place, you can add the subflooring material on top. Subflooring is typically a layer of plywood or oriented strand board (OSB) that provides a stable surface for the finished flooring material.
It's important to note that floor joists are not directly attached to drywall. Drywall is installed on the interior walls and ceilings after the floor framing is complete. The drywall is attached to the wall studs and ceiling joists, not the floor joists.
If you are unsure about how to install floor joists or any other structural elements, it's best to consult with a professional contractor or structural engineer to ensure the work is done safely and meets all building codes and regulations.