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J. Peter Jordan
Senior Member
Username: jpjordan

Post Number: 939
Registered: 05-2004
Posted on Tuesday, February 14, 2017 - 10:37 am:   Edit PostDelete PostPrint Post

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.

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:   Edit PostDelete PostPrint Post

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:   Edit PostDelete PostPrint Post

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:   Edit PostDelete PostPrint Post

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:   Edit PostDelete PostPrint Post

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.

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