The failure temperature for cold-drawn steel cables is what?

The failure temperature for cold-drawn steel cables is what?

• A. 800 Degrees F
• B. 1200 Degrees F
• C. 900 Degrees F
• D. 1000 Degrees F

Answer: (A)

The key idea is how heat weakens steel. Cold-drawn steel cables are strong at room temperature, but as temperature rises their yield and tensile strength drop, and the rope becomes far less able to carry load. In typical fire-resistance guidance, a threshold around 800°F marks when the remaining strength of cold-drawn wire rope is no longer sufficient to support its design load, leading to failure under ordinary service forces. That’s why 800°F is cited as the failure temperature for these cables in many training and safety references. The higher temperatures listed would imply further degradation, but the point at which failure becomes likely under normal loading conditions is about 800°F.

The key idea is how heat weakens steel. Cold-drawn steel cables are strong at room temperature, but as temperature rises their yield and tensile strength drop, and the rope becomes far less able to carry load. In typical fire-resistance guidance, a threshold around 800°F marks when the remaining strength of cold-drawn wire rope is no longer sufficient to support its design load, leading to failure under ordinary service forces. That’s why 800°F is cited as the failure temperature for these cables in many training and safety references. The higher temperatures listed would imply further degradation, but the point at which failure becomes likely under normal loading conditions is about 800°F.