My name is John Shaw, Principal Technical Advisor with the Victorian Building Authority. I see that you have your tested fire bunker hatch to AS1530.4 but have you also tested it to AS1530.8.2 as recommended in the national Performance Standard for Private Bushfire Shelters Part 1 2010 published by the Australian Building Codes Board?
Thank you for your enquiry. I would like to chat to you if possible. Please contact me on 0402219450. Dean