coping versus roof at parapet

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Author Message Robin E. Snyder Senior Member Username: robin Post Number: 698 Registered: 08-2004 Posted on Sunday, September 10, 2017 - 11:07 pm:    I thought I asked this once upon a time, but can't find the answer. Is there a maximum width for copings? I don't have a full SMACNA manual with me. Guest (Unregistered Guest) Unregistered guest Posted on Monday, September 11, 2017 - 12:48 pm:    Wouldn't coping dimensions (and other details) depend on material type/gauge and compliance with SPRI ES-1? Also check NRCA's list of authorized fabricators for SPRI ES-1 certification, for project's locale. There is currently only one listed in Phoenix. Robin E. Snyder Senior Member Username: robin Post Number: 699 Registered: 08-2004 Posted on Monday, September 11, 2017 - 01:02 pm:    the thickness table addresses minimum thickness for flatness, but only goes up to 16 inches wide. Hence my question, is that the maximum a coping can be before it needs to be a "roof" (standing seam". Steven Bruneel, AIA, CSI-CDT, LEED-AP, EDAC Senior Member Username: redseca2 Post Number: 602 Registered: 12-2006 Posted on Monday, September 11, 2017 - 01:37 pm:    Met-Fab will sell factory fabricated copings to 20-inches wide. Steven Bruneel, AIA, CSI-CDT, LEED-AP, EDAC Senior Member Username: redseca2 Post Number: 603 Registered: 12-2006 Posted on Monday, September 11, 2017 - 01:40 pm:    OMG goes to 32-inches with PermaSnap Steven Bruneel, AIA, CSI-CDT, LEED-AP, EDAC Senior Member Username: redseca2 Post Number: 604 Registered: 12-2006 Posted on Monday, September 11, 2017 - 01:41 pm:    OMG goes up to 32-inches with PermaSnap Anonymous (Unregistered Guest) Unregistered guest Posted on Monday, September 11, 2017 - 04:33 pm:    12 inches for SPRI ES-1 compliance per SMACNA Technical Resources Bulletin TRB #01-17. If you want wider (and for it to be code compliant), you'd have to test for compliance with SPRI ES-1. The bulletin notes that the width cannot exceed what was tested. For coping, SMACNA only tested a 12-inch-wide coping. https://www.smacna.org/docs/default-source/technical-resources/trb-01-17-es-1-final-report.pdf?sfvrsn=2461f3a5_4 Of course, your question isn't really about what is available from manufacturers or if SMACNA has a maximum dimension. Isn't it more a question of the definition of coping versus roof? Is the coping/roof in question covering the parapet, or is it covering interior occupied space? If covering a parapet I don't think the dimension matters, it is a coping. If covering interior occupied space, it is a roof. So really the answer is another question; is there a maximum width for parapets? Robin E. Snyder Senior Member Username: robin Post Number: 700 Registered: 08-2004 Posted on Monday, September 11, 2017 - 07:56 pm:    no anonymous, my question isn't about the definition of roof v coping. I am not getting bogged down in the terminology. My question, as noted above, is there a maximum width for coping, whether field fabricated and tested or manufactured and tested as a coping? After a parapet width exceeds that maximum width for any tested or recommended coping, i would recommend a standing seam metal roof instead of a coping product. I don't really care if the "roof" is installed over interior occupied space or over a big wide parapet if it is the more appropriate system. If, say a Berridge roof, was used, i would still call it a standing seam metal roof, even if used in a parapet application. Robin E. Snyder Senior Member Username: robin Post Number: 701 Registered: 08-2004 Posted on Monday, September 11, 2017 - 07:57 pm:    Thank you Steven - the Permasnap product should work! Steven Bruneel, AIA, CSI-CDT, LEED-AP, EDAC Senior Member Username: redseca2 Post Number: 605 Registered: 12-2006 Posted on Monday, September 11, 2017 - 08:33 pm:    You are welcome Robin. OMG was formerly W. P. Hickman, which was our long term basis of design for parapet copings.