Reinforcement Steel in concrete

Are you referring to precast concrete that has been fabricated off-site, where the rebar has been cast into the concrete before delivery? Or are you asking about reinforcing steel for cast-in-place concrete? Such reinforcing is delivered to the site separately and set in place inside forms. Concrete is then poured on-site into the forms around the rebar.

Exactly! In precast concrete, all components are assembled off-site, so the cost includes all components. In this case, calculate the recycled content as described in the Reference Guide under the heading “Calculating Assembly Recycled Content.” For this calculation, you will need to know the total cost for the precast items (including fabrication) and the total weight (mass) and recycled content percentages of each component (steel, cement, SCMs, sand, aggregates, water, admixtures, and any other accessories cast into the work). If the concrete supplier is willing to break out the total cost for cementitious material, you can use the Supplementary Cementitious Materials Calculation for that portion of the concrete. For the steel in cast-in-place concrete, calculate recycled content separately from concrete based on steel costs.