Where a roof is completely surrounded by parapet walls and drainage is provided by scuppers or internal drains, overflow scuppers should be provided. The roof-side flange of the gravel stop is nailed at 3 O.C. to the perimeter blocking.
https://www.copper.org/applications/architecture/arch_dhb/arch-details/gutters_downspouts/scuppers.html
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Scuppers are fabricated with flanges on the roof side which extend 4 onto the roof. Wood blocking is required under scuppers to provide a nailable surface. Scuppers should be spaced no greater than 10 feet apart depending on the roof area drained.
https://www.copper.org/applications/architecture/arch_dhb/arch-details/gutters_downspouts/scuppers.html
Description: Scuppers are used to provide an outlet through parapet walls or gravel stops on flat and built-up roofs to allow drainage of excess water. They can be used in conjunction with gutters and downspouts to divert the flow to the desired location.
https://www.copper.org/applications/architecture/arch_dhb/arch-details/gutters_downspouts/scuppers.html
Leader Heads, Rain Conductors, etc. 1  The area of roof being serviced. 2  Scupper pan dimensions. 3  Downspout required for adequate drainage.  Color, material, cost, building codes, & more.
http://www.scupperbox.com/
Commercial Roofs: Gutters, Drains, and Scuppers. IBHS Roofs > Commercial Roofs: Gutters, Drains, and Scuppers. Gutter and roof drainage systems are an important part of all roof systems, but they are often overlooked when it comes to proper maintenance and care. In fact, they may be considered the “unsung heroes” of roof systems because of their key role in effectively removing water and debris from the roof.
https://disastersafety.org/ibhs/commercial-roofs-gutters-drains-and-scuppers/
EPDM ROOFING: SCUPPER DRAINS. Scupper drains provide a means for water to flow off roofs surrounded by parapet walls. We offer thre superior quality cast-aluminum scupper drains with spigot ends that can be coupled to 2”, 3”, or 4” pipe. They can be installed in two positions: either with the outlet pipe passing through the parapet wall or with the outlet pipe passing through the roof deck.
http://www.conservationtechnology.com/waterproofing_epdm_scuppers.html
There are several factors to consider: 1  Find points on a roof where water will drain naturally. 2  Make sure that run off from the scupper does not accumulate around a foundation or wall. 3  Make scuppers wide enough to handle large amounts of water and debris.  The scupper must be accessible for debris removal and maintenance.
https://commercialroofusa.com/scuppers-drains-commercial-flat-roofs/
Scupper/Parapet Complete Roof Drains. We carry over twenty types of complete scupper roof drains, by notable names such as Smith, Zurn, and Thunderbird. Our scupper/parapet roof drains are made in a variety of different durable materials including copper, cast iron, and bronze. These drains come in a variety of styles and shapes, and all have an attractive finish.
http://www.roofdrainexpress.com/scupper-parapet-complete-roof-drains-251.html
It is very important to install scuppers in the proper places on commercial flat roofs. Find points on a roof where water will drain naturally. Make sure that run off from the scupper does not accumulate around a foundation or wall. Make scuppers wide enough to handle large amounts of water and debris. The scupper must be accessible for debris removal and maintenance.
https://commercialroofusa.com/scuppers-drains-commercial-flat-roofs/
what are roof scuppers
A roof scupper is an outlet through parapet walls or gravel stops on flat and built-up roofs to allow drainage of excess water. Roof scuppers are used to provide an outlet through parapet walls or gravel stops on flat and built-up roofs to allow drainage of excess water.