When a chain is going to be used in below -40°F conditions, you must

• A. examine the chain carefully
• B. consult the manufacturer
• C. lift the load slowly
• D. double up the chain

Answer: (B)

When chain is used in extremely cold conditions, temperature effects on metal and lubrication dominate safety. At temperatures below -40°F, many chains can become brittle and less ductile, increasing the risk of sudden fracture under load or shock. Lubricants can thicken or stop flowing, further reducing performance and reliability. Because these temperature-related changes vary by material, alloy, and lubrication, you need the manufacturer’s guidance to confirm whether the chain is rated for that specific low temperature, and to learn any special requirements (such as different chain material, alternative lubrication, or altered load limits) for safe use. Simply inspecting the chain or changing the way you lift won’t address these fundamental temperature effects, and doubling up the chain could mask a critical weakness. Consulting the manufacturer ensures you have the correct rating and handling instructions for safe operation in that environment.