We need to fix a 120 minutes fire resistant duct work using HIT-RE 500 V4 INJECTION MORTAR. Duct work is weghting 95 kg per linear meter and I would like to get a spec on this weight and if the injection can withold the fire rating as well . Fixing will be from the soffit .
Thnaks for your question. I would refer you to your local HILTI organisation to provide an answer for you. In addition to the information currently supplied they will need to know details about the concrete base material, i.e. how thick it is , is it considered cracked or uncracked ? Is there reinforcement to control the crack width? What is the strength of the concrete? Any slab edges, openings id so what distance to the anchors Additionally, what is the required load acting on the fixings in the non fire condition as well as the load at the noted R120. When they have that information they will be able to assist you further.