Tuesday, February 24, 2009

Assembly and Unit Cost Estimating (Quantifying Concrete)

In Introduction to Building Construction II, we were tasked with quantifying concrete for a set of blueprints given to us in class of a Research and Development facility. Unfortunately for us,
the size of the numbers on the printed "prints" were not as large as we would have like them to be. But I guess it's only appropriate because the on-site prints sometimes can be no different. So, I started quantifying the site using a traditional quantify sheet and a few pieces of scratch paper. The research and development facility was your average square, so quantifying it at times proved to be more of a challenge than I had expected. There were multiple things to quantify, including but not limited to: interior and exterior walls, 4" slabs, 6" slabs, a thickened slab, stairs, foundations, rebar, vapor barriers, saw cuts, and a continuous wall footing. Once I had quantified all the these things and recorded them on the quantifying sheet, I used CostWorks located on RSmeans.com.

CostWorks is an online data base that you can subscribe to. We were required to in order to use it for various in-class projects. It's a substantially large data base that includes unit prices and assembly prices; both of which we had to do for this project. So, I basically wondered the data for anything and everything related to things on the quantifying sheet, and I added them. Once that was done, I imported it to excel, and I produced an assembly and unit cost estimate (pictures below).

Unit Cost Estimate (Excel)












Assembly Estimate (Excel)

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