Delegated Design

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Author Message J. Peter Jordan Senior Member Username: jpjordan Post Number: 939 Registered: 05-2004 Posted on Tuesday, February 14, 2017 - 10:37 am:    Several fellow specifiers recently reported difficulty with getting Contractors to comply with most (not all) delegated design requirements in the specifications. There was an interesting article on delegated design in the electronic edition of Durability and Design. http://www.durabilityanddesign.com/blog/?fuseaction=view&blogID=372&nl_versionid=2289 For which components are you specifying delegated design. What, if any push back are you seeing on delegated design requirements? J. Peter Jordan, FCSI, AIA, CCS, LEED AP, SCIP Jerome J. Lazar, RA, CCS, CSI, NCARB Senior Member Username: lazarcitec Post Number: 1739 Registered: 05-2003 Posted on Tuesday, February 14, 2017 - 09:44 pm:    Peter, I deleted my subscription to D+D last year, I was being bombarded with email, in order to access the article it seems I must register again? Structural Engineers are refusing to specify Cold Formed Metal Framing and insist we call for this to be a delegated design item. Mark Gilligan SE, Senior Member Username: mark_gilligan Post Number: 810 Registered: 10-2007 Posted on Friday, February 17, 2017 - 12:22 am:    There is no reason why a structural engineer hired by the owner cannot design cold formed steel elements. Some of the reasons may be that they are not familiar with the cold formed codes and that it was not included in their original scope of work. J. Peter Jordan Senior Member Username: jpjordan Post Number: 941 Registered: 05-2004 Posted on Friday, February 17, 2017 - 09:48 am:    I agree with Mark's observation; however, when the cold-formed metal framing is for exterior non-load-bearing framing, it is generally not considered "structural" even though there is a wind load involved. I most often see the engineers designing cold-formed metal framing when it is for load bearing studs and floor or roof joists (or trusses). J. Peter Jordan, FCSI, AIA, CCS, LEED AP, SCIP ken hercenberg Senior Member Username: khercenberg Post Number: 1056 Registered: 12-2006 Posted on Friday, February 17, 2017 - 10:52 am:    Most of the time the structural engineers I work with are willing to work with me in establishing the performance criteria that the GC's Delegated Design has to comply with, including for CFMF regardless of usage. We're rarely tasked with designing this ourselves, or with receiving sufficient time or budget to do so. Besides, with most items that can be done as delegated design such as curtain wall, precast concrete, dimension stone, etc., we will tend to overdesign in our efforts to protect ourselves and the owner since we have no idea what the Installer is or isn't capable of. The feedback I've received from many Installers is that they prefer designing the systems themselves since they do this all the time and can be more efficient and competitive. I believe that typically the owner gets a better end result for less money and less hassle with Delegated Design.