This modular system is one of six variations installed on the roof and covers 800 square feet con sisting of two foot by two foot trays with six inches of mineral soil and over 1 500 sedum plugs.
Nycpc roof drains for set back roof.
The clamping collar secures the membrane at each drain to ensure a water tight seal.
More attention should be given to the location of a drainage system to avoid future problems.
Smith carefully designs and manufactures a full line of roof drains deck drains scupper drains promenade and parking area drains and more to satisfy both the artistic eye of the architect and the calculating mind of the engineer.
Inner drains gutters or scuppers each have their own function and deciding which system is best depends on.
No hub cast iron high volume roof drain with ductile iron dome.
An extensive green roof system installed atop the nyc department of parks and recreation s dpr five borough building on randall s island.
P 1503 4 1 secondary emergency overflow drains or scuppers.
Where roof drains are required secondary emergency overflow roof drains or scuppers shall be provided where the roof perimeter construction extends above the roof in such a manner that water will be entrapped if the primary drains allow buildup for any reason.
When selecting a roof drain note.
The membrane is cut out at each drain and is secured by the drains clamping collar.
A siphonic roof drain looks much like a traditional roof drain.
Flat roof drains scuppers gutters and drainage systems on flat roofs.
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The roof drain is usually set in the deck and the membrane is stretched over the entire roof.
One of the most overlooked items on a flat roof is the draining system.
This air baffle is engineered and tested to prevent air from entering the piping system at peak flows.
Roof drains for flat or low slope roofs come in a few standard types.
Epdm roofs are water proof and tend to be expensive.
Roof drains from zurn include combination primary overflow control flow dual outlet siphonic retrofit and more which cater from educational to commercial needs.
The best type for the application depends on several factors such as the size and slope of the roof the desired appearance and how much regular maintenance the drain system might need.
The distinguishing feature of a siphonic roof drain is the air baffle.
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To select the proper roof drain the following information must be known.