After girders or beams are set in place, what is the first step in building the floor frame?

The first step in building the floor frame after girders or beams are set in place involves attaching the sill to the foundation walls. The sill serves as a stable base that connects the framing system of the floor to the foundation, providing essential support and alignment for the entire structure. By securely fastening the sill to the foundation walls, it ensures that the floor frame will be accurately positioned and anchored, creating a solid starting point for subsequent framing tasks.

Once the sill is attached, other elements of the floor frame, such as the floor joists, can then be laid out and installed properly. The process of framing relies on this initial step to maintain the integrity and stability of the overall structure, as it directly impacts the load distribution and the level of the flooring system. This foundational step is crucial for the construction process, as it sets the stage for all other components to follow correctly.