skoz44 Posted June 10, 2019 Share Posted June 10, 2019 On flat roofs with parapets, the new IRC R903.4.1 is now requiring an overflow above the scupper, or roof drains to be installed. A 4" overflow would look pretty odd above a 6" scupper and clay pipe. The roof drain option becomes a little more expensive. What are you guys doing regarding this? And does anybody have a roof drain detail they'd be willing to share? Thanks. Aaron Link to comment Share on other sites More sharing options...
Joe_Carrick Posted June 10, 2019 Share Posted June 10, 2019 Are you sure that doesn't mean 4" above the lowest elevation of the scupper? The idea is to provide an extra drain in case the scupper get's plugged or just plain overwhelmed. Link to comment Share on other sites More sharing options...
jorgearaya Posted June 11, 2019 Share Posted June 11, 2019 It is a secondary overflow drain, look at https://www.zurn.com/products/building-drainage/roof-drains for options and details Link to comment Share on other sites More sharing options...
JJohnson Posted June 11, 2019 Share Posted June 11, 2019 Link to comment Share on other sites More sharing options...
jorgearaya Posted June 12, 2019 Share Posted June 12, 2019 Nice "ISO" try making circles in that, have fun! Top, right and left. Good luck. Link to comment Share on other sites More sharing options...
glennw Posted June 13, 2019 Share Posted June 13, 2019 Like this? A bit of a fiddle, but not too hard to do. Link to comment Share on other sites More sharing options...
jorgearaya Posted June 13, 2019 Share Posted June 13, 2019 I agree, we should have more control over the ellipse so that actual diameter could be entered. I should have said create a cube in ISO and add circles to each face, try different diameters. Standard ISO angles of 30, 90, 150 Notice that there are no trim/extend options available for working with ISO Circles (Ellipse) Link to comment Share on other sites More sharing options...
glennw Posted June 13, 2019 Share Posted June 13, 2019 Quote I agree, we should have more control over the ellipse so that actual diameter could be entered. You can draw an ellipse by defining both (or one) axis dimensions while dragging the ellipse. When dragging the ellipse, press the Tab button. Make the End Point "Relative to Start" and uncheck polar. You can then enter both axis lengths that you need. Or, another easy is to draw a Rectangular Polyline the size you want the ellipse and the drag the ellipse from one corner to the other diagonal corner. Link to comment Share on other sites More sharing options...
glennw Posted June 13, 2019 Share Posted June 13, 2019 12 hours ago, jorgearaya said: I should have said create a cube in ISO and add circles to each face, try different diameters. Standard ISO angles of 30, 90, 150 Something like this? This is a 2D drawing. Once again, a bit of a fiddle, but easily do-able. 1 Link to comment Share on other sites More sharing options...
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