Final answer:
Selecting a rectangular HSS for a column involves checking the AISC Steel Construction Manual to find a section that can handle the specified loads with an appropriate safety margin, while considering the yield stress and buckling resistance.
Step-by-step explanation:
To select a suitable Hollow Structural Section (HSS) for a column to support various service loads like 500 kN, 750 kN, 1000 kN, and 1250 kN, several factors must be considered. These factors include the column's material strength, its buckling resistance, the cross-sectional dimensions that would provide enough strength and stability, and the slenderness ratio of the column.
The process involves using the steel construction manual, where you can find tables with pre-calculated capacities for different HSS sizes under axial compression. Considering the yield stress of the material and the length of the column, which affects its buckling resistance, we identify the appropriate section that can handle the specified load with a suitable safety margin.
For example, using the AISC Steel Construction Manual, we would look up the axial compressive resistance for different HSS sections based on their geometric properties. We then choose a section whose axial compressive resistance exceeds the design loads given, which are 500 kN, 750 kN, 1000 kN, and 1250 kN. This approach ensures that the column will adequately support the loads without exceeding the allowable stress limits or buckling under the service loads.