Product Designations on Drawings

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Author Message Mark Gilligan SE, CSI Senior Member Username: markgilligan Post Number: 81 Registered: 05-2005 Posted on Sunday, May 21, 2006 - 01:49 pm:    There are certain situations where it is necessary to use manufacturer’s product designations on drawings as opposed to generic names. Some examples include: --Joist hangers, straps and similar products used in wood construction. We typically refer to Simpson products. --Components of strut systems. For example Unistrut products. Inventing generic names for a Simpson HD10 and then using them on the drawings would only cause confusion. This is especially true since a modest size project could include dozens of different products. In both of the listed examples the manufacturers listed are the leaders in the market and the competitors often have comparable products thus making it feasible to entertain substitutions. I believe that the PRM should address this and similar situations where conformance to the ideal may not be appropriate. Are there other situations where manufacturer’s product designations belong on the drawings? John Bunzick, CCS, CCCA Senior Member Username: bunzick Post Number: 521 Registered: 03-2002 Posted on Monday, May 22, 2006 - 08:45 am:    This sounds like a perfect scenario for a schedule. Each unique product could be given a designation; FA-1 might be framing anchor type 1, for example. Then in the specs have a schedule with the salient characteristics and model numbers. You could use a "basis of design" listing with one product, or list more than one manufacturer and model for each type product. Alternatively, you could put the Simpson product on the drawngs, and your spec could list alternative manufacturers. I agree that invented names could be confusing, depending on how many different but related products there were. George A. Everding, AIA, CSI, CCS, CCCA Senior Member Username: geverding Post Number: 160 Registered: 11-2004 Posted on Monday, May 22, 2006 - 10:42 am:    Other examples- Synthetic "wood" mouldings (Fypon). Drywall and plaster trim (Fry Reglet or Gordon). Schedules are a good idea, but I wonder if a schedule is overkill if you only have a couple of reveal trims. Of course, in that case you may be back to inventing names ("reveal trim", "corner trim") and putting the products in the specification.