What is the minimum allowable individual thickness measurement for a tube steel column that requires 1 inch of SFRM?

When considering the minimum allowable individual thickness measurement for a tube steel column requiring 1 inch of Spray-Applied Fire-Resistive Material (SFRM), it is essential to understand the relationship between the structural component and the fireproofing requirements. SFRM is applied to protect steel columns from high temperatures during a fire, ensuring that the structural integrity of the steel is maintained.

The thickness measurement of 1 inch indicates that the SFRM must be sufficiently thick to effectively provide the necessary fire resistance rating. Therefore, the minimum thickness of the steel column itself should also be at least 1 inch to adequately support the weight and allow for the appropriate application of the fireproofing material.

A steel column with a thickness of less than 1 inch may not be able to support the fireproofing coating properly, which could lead to failure in meeting fire resistance standards. Additionally, using a thicker steel column can enhance its structural properties, but in this scenario, the focus is on meeting the specific fireproofing requirement of 1 inch.

Therefore, the requirement for a minimum thickness directly corresponds to the thickness of the SFRM needed for effective fire protection, making the requirement of 1 inch the correct answer.