Fire Underwriter Knot Published on January 3, 2018 in JI: Training within Industry – Job InstructionsFull resolution (1889 × 898) Fire Underwriter Knot Illustration of the steps to make the Fire Underwriter Knot. This work by Christoph Roser at AllAboutLean.com is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. Please credit the image as shown below. For digital documents and web pages please do include the links as shown below. Thank you.By Christoph Roser at AllAboutLean.com under the free CC-BY-SA 4.0 license.