Which type of blocks are specifically designed to meet fire resistance standards?

Underwriters blocks are specifically designed to meet fire resistance standards. These blocks are manufactured with materials and properties that are tested and certified to withstand high temperatures and resist the spread of fire, aligning with fire safety regulations and standards. Their design is usually governed by building code requirements that dictate the level of fire resistance needed in construction materials based on the structure's usage and occupancy.

In contrast, insulated blocks, while providing thermal insulation, are not primarily created for fire resistance. Decorative blocks serve aesthetic purposes and may not have specific fire-resistive attributes. Load-bearing blocks support structural loads but may not necessarily comply with fire resistance requirements unless explicitly specified. Underwriters blocks, therefore, stand out as the designated solution for situations that require enhanced fire performance, ensuring safety in the event of a fire incident.