🔍 Key Concepts

• Boiler refractory purpose and how it is held in place • How anchor bolts transfer load from refractory to boiler casing • Difference between mechanical support and materials like mortar or brick slots

💭 Think About

• Think about which option describes a strong, positive mechanical connection between the bolt and the steel casing of the boiler. • Which choice would best resist the weight of the refractory and the vibration/expansion of the boiler during operation? • Ask yourself: does the casing connection depend on steel-to-steel fastening or on the refractory material itself?

✅ Before You Answer

• Verify which option clearly connects the anchor bolt directly to the steel casing, not just to the refractory material. • Check which method would still hold the bolt in place even if some refractory were damaged or missing. • Be sure the method provides a secure, repeatable attachment point that can be installed before laying up the refractory.