Synthetic slings should not be exposed to temperatures above which value?

• A. 40°F
• B. 200°F
• C. 93°F
• D. 100°F

Answer: (B)

Synthetic slings are made from polymer fibers, and heat directly attacks their strength. As temperatures rise, the polymer chains relax and weaken, reducing the sling’s tensile strength and potentially causing failure under load. That’s why there’s a defined maximum heat exposure for these slings—to keep their strength and safety margin intact. For most synthetic web slings, this upper limit is around 200°F (about 93°C). Staying below this temperature helps prevent degradation from heat sources like radiant heat, hot surfaces, or steam.

The other temperatures listed are well below the actual limit and would not correctly represent the maximum safe exposure. They might matter in other contexts (extreme cold can affect stiffness and performance), but they do not set the upper bound for heat exposure of synthetic slings.