What is the max weights that a 75mm steel bar can carry?

The maximum weight a 75mm steel bar can carry depends on several factors, including the type of steel, the length of the bar, and the manner in which the weight is applied (e.g., bending, tension, or compression). Generally, structural steel has a yield strength of around 250 MPa to 400 MPa, which can be used to calculate the load-bearing capacity. For a precise answer, specific calculations based on the bar's properties and application conditions are necessary. It is recommended to consult engineering standards or perform structural analysis for accurate assessments.