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Prescriptive specifications define the requirements using generic or proprietary descriptions of what is required, whereas performance specifications focus on the outcomes rather than the characteristics of the components. Specifications are an integral part of Building Information Modeling and cover the non-geometric requirements.
Using a Performance Based approach does not preclude the use of prescriptive specifications. Although the benefits of the adopting of a PBBD approach are significant, it is recognized that employing a performance-based approach at any stage in the building process is more complex and expensive than using the simpler prescriptive route.
Prescriptive path: All components of the building meet the minimum standards specified by ASHRAE 90.1. Performance path : A proposed building design is demonstrated (through building performance simulation ) to use less energy than a baseline building built to ASHRAE 90.1 specifications.
"50 Divisions" is the most widely used standard for organizing specifications and other written information for commercial and institutional building projects in the United States and Canada. [5] Standardizing the presentation of such information improves communication among all parties.
The 16 Divisions of construction, as defined by the Construction Specifications Institute (CSI)'s MasterFormat, is the most widely used standard for organizing specifications and other written information for commercial and institutional building projects in the U.S. and Canada.
Glasses wearers — myself included! — know just how important a good pair of specs can make in your everyday life. The right prescription and fit can mean fewer headaches, less eye strains ...
Rather, the less prescriptive the project, the more the client needs an architect to steward an emergent design from vision to completion. So it follows that for the broadest range of building projects, the rigors of architect-led design–build is compelling and preferable where design is of paramount importance to the client.
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