The focus of this blog is construction-related topics. The purpose is discussion, so please feel free to comment! See Specific thoughts for thoughts from the daily life of a specifier.

30 May 2010

Wood Door Finishes

Last year, while updating our wood door specifications, I became a little confused while trying to figure out the finish systems specified in AWI/AWS and WDMA standards. In the past I had specified wood doors using AWI standards, but after investigating the relevant standards, I changed our wood door specifications to use the WDMA standards because they are more specific to wood doors. However, because some literature refers to AWI and some to AWS standards, and some refers to current standards while others refer to old ones, I created a conversion table so I don’t have to go back to the standards whenever we get shop drawings.

Standards of the Architectural Woodwork Institute (AWI) and the Wood Door Manufacturer’s Association (WDMA) have been similar for a long time, and in most cases, a door that meets Premium Grade standards for one will meet them for the other. Perhaps the most important exception is face veneer grades, but I'm going to limit this discussion to finish standards.

02 May 2010

Missing Standards

Although there may be a few products that require little thought in specifying, most require some minimum amount of research, comparison of similar products, and determination of the right combination of characteristics best suited to a project.

Even then, the process can be straightforward and fairly simple, provided the type of product is common, governed by widely accepted standards for materials and performance, well-described in product data, and supported by reputable manufacturers and representatives. Hollow metal doors and frames are a good example. Most manufacturers produce them according to one or both of two sets of common industry standards, published by the Steel Door Institute (SDI) and the National Association of Architectural Metal Manufacturers (NAAMM). Unfortunately, not all types of building products can be specified by use of similar standards.

Before you start that e-mail telling me how difficult it is to specify hollow metal doors,