What is the width of the building described in the joist span calculation?

In joist span calculations, the width of the building is a crucial factor, as it influences the spacing, sizing, and material requirements of the joists that will support the structure. The correct width given as 9,600 mm typically corresponds to a common span used in residential or commercial construction applications, aligning with standard lumber dimensions and building practices.

Buildings are often designed with specific calculations that take into account the load they will carry, and this width can be derived from either the architectural design or structural calculations intended to meet particular building codes. When engaging in a joist span calculation, knowing the width allows for accurate determination of how many joists are necessary, their length, and the size needed to appropriately distribute loads according to the engineering principles.

The other options provided may represent widths that are less common or exceed typical dimensions for certain types of buildings, making 9,600 mm the most plausible choice for a typical structure requiring standard joist arrangement and material compatibility.