Type I construction provides structural stability during a fire, but this structural integrity can be weakened by the heat generated by combustible:

Type I construction is characterized by non-combustible materials and is designed to withstand significant heat and fire exposure. However, even in Type I buildings, structural stability can be compromised by heat, particularly if combustibles are present within the structure.

Interior furnishings, which include items such as furniture, carpets, and drapes, are typically made from materials that can ignite and contribute to the development of high heat conditions during a fire. This heat can affect the structural components, including steel framing, weakening them over time and potentially leading to structural failure. Therefore, the correct answer highlights the primary concern in a Type I construction setting, emphasizing that while the building itself is designed for fire resistance, the presence of combustible interior furnishings can pose risks to its structural integrity.

In contrast, steel framing components, concrete slabs, and masonry walls, while they can be affected by extreme heat, are considered non-combustible and do not contribute additional fuel to the fire. Consequently, they have a greater ability to maintain stability under fire conditions compared to the combustibles found in furnishings.