Revise the third paragraph to read as follows:
"Products that arrive at the project site ready for installation:
• Metal studs, wallboard, and concrete masonry units are all separate products.
• For wallboard, the gypsum, binder, and backing are all required for the product to function, so each ingredient does not count as a separate product.
• Concrete is a single product as it typically arrives at the site as a mixed product ready to pour.
Products that arrive as an ingredient or component used in a site-assembled product:
• Lumber for custom millwork.
• Concrete mix components (admixture, aggregate, and cement) may be considered separate products if they arrive to site as separate products."