Where do estimators acquire the quantity of materials needed for a bid?

Estimators primarily acquire the quantity of materials needed for a bid from the plans. The construction plans (or blueprints) provide detailed information about the project, including dimensions, specifications, and material requirements. By analyzing these documents, estimators can accurately determine how much of each material will be necessary for the completion of the project.

This approach ensures that the estimations align with the design intent and the requirements outlined by engineers and architects. The details included in the plans allow estimators to quantify the volumes, areas, and counts of materials that will be required, which is crucial for preparing a competitive and realistic bid.

While subcontractor quotes, supplier estimates, and industry standard guidelines can provide valuable insights and support the estimation process, they do not replace the foundational role that construction plans play in determining material quantities. These sources may influence cost evaluations or confirm assumptions, but the primary source for material quantities originates from the detailed specifications illustrated in the plans.