Select the first letter of the word from the list above to
jump to appropriate section of the Roof Drain Glossary.
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Bearing Pan
See SUMP RECEIVER
Dome
A convex strainer with sufficient free area
above its base, which permits continuous roof drainage if debris collects around drain.
Expansion Joint
Device which compensates for thermal
expansion in roof or piping connected to roof drain.
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Gravel Guard (Stop)
That portion of the clamping device which
restricts passage of roof gravel into drainage system.
Gutter or Cornice Roof Drain
A roof drain for installation in gutters,
cornices, balconies and other overhanging construction to prevent overflow to areas below.
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Parapet Roof Drain
A roof drain for installation in parapets
for conveying rainwater from a roof area through the parapet.
Promenade or Deck Drain
A roof drain for installation in roof decks
subject to pedestrian or vehicular traffic.
Promenade Top
Square or round top with flat grate for
roof drains when used on promenade or walking decks.
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Standard or General Purpose Roof
A roof drain for installation in any roof
area excluding the parapet of the roof structure.
Sump (Drain) Receiver
A device which receives and uniformly
supports roof drain, distributing weight of drain over larger area of roof.
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Underdeck Clamp
Clamp device used to secure drain to roof
deck to prevent vertical movement and possible roofing or membrane breakage around drain.
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Water Dam
A solid ring attached to clamping device to
maintain a specific water depth on roof or to serve as an overflow.
Weir Opening
Collar with openings designed to restrict
drainage to metered amounts to prevent sewer overload.
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Copyright © 2000-2007 by Jay R. Smith Mfg. Co.®
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