Full-Bore Siphonic Roof Drains Overview by Jay R. Smith Mfg. Co.

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The 1005 and 1605 Full-Bore Siphonic Roof Drains promote the principal of full-bore flow within the engineered siphonic roof drainage piping system. These drains use Siphonic action created by a patented internal baffle to have superior volume and velocity performance compared to traditional roof drainage. Other than the baffle, a siphonic roof drain has the same features as a traditional roof drain including a drain body, flashing ring, dome strainer and fastening hardware.

For more information, please visit www.jrsmith.com

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Full-Bore Siphonic Roof Drains Overview by Jay R. Smith Mfg. Co.

  1. 1. Save money in time, material and site preparation!
  2. 2. Siphonic Roof Drains - The Level Approach to Roof Drainage Introduction/Brief Summary 1 Siphonic Roof Drain Sales Opportunity 2 Basic Principle of Siphonic Roof Drainage 3 Benefits of Siphonic Roof Drainage 4 Siphonic Roof Drain Models 5-6 Installation 7 Applications 8 Cost Savings 9 Case Studies 10-19 Listings/Certifications/Codes/Standards 20 Engineering Resources 21 Summary of the Benefits 22 Summary 23
  3. 3. Introduction/ Brief Summary 1 Siphonic Roof Drainage – A Short History <ul><li>- Invented and patented in 1968, the concept was primarily used in Scandinavia during the 1970s and later in Europe and the rest of the world. </li></ul><ul><li>- First U.S. building using siphonic drainage - Boston Convention Center, 1999. </li></ul><ul><li>- “Siphonic Roof Drainage Fundamentals,” PM Engineer Magazine, 2001. </li></ul><ul><li>- IKEA Home Furnishings imports technology into the U.S. starting in 2002. </li></ul><ul><li>ANSI/ASME A112.6.9 “Siphonic Roof Drains,” 2005. </li></ul><ul><li>ASPE Work Group 45 “Siphonic Roof Drainage Design”. </li></ul><ul><li>Jay R. Smith Mfg. Co. develops first U.S. made siphonic roof drain. </li></ul>- Looks much like a traditional roof drain. - The distinguishing feature is the air baffle. - The air baffle is engineered and tested to prevent air from entering the piping system at peak flows. Siphonic Roof Drain Anatomy – What is a siphonic roof drain?
  4. 4. Siphonic Roof Drain Sales Opportunity Benefits to the owner, engineer and contractor Reduced building costs – less material, fewer vertical stacks, less excavation, backfill, ground work and exterior underground piping. Design flexibility – level pipe installation, stack and horizontal pipe location are highly flexible simplifying coordination with other building elements. Save money in time, material and site preparation – smaller pipe sizes, minimized installation costs. Sales opportunity for representatives Innovative and efficient roof drainage solution especially for low rise buildings with large footprints and flat roofs. Strong interest already exists among construction/engineering community. Product looks like and installs like a traditional roof drain unlike European products. Product uses existing and familiar accessories and allows use of existing pipe, fitting and coupling products (no specialized pipe). New construction or retrofit potential (easy replacement of drainage piping). 2
  5. 5. Main Principles of Siphonic Roof Drains Open outlets allow water and air to enter. Pitched horizontal piping induces flow. Atmospheric pressure throughout the system. Capacity is limited by drain size and water depth. Piping is only ½ to 2/3 full. “ Closed” outlets – air baffle promotes “full-bore” flow. Horizontal piping is not pitched. Atmospheric pressure pushes water into the system. Capacity is determined by piping and elevation difference. Piping primes and operates 100% full. 3 The Siphon Principle - A well understood hydraulic principle with many useful applications. - Discharge end is lower than the level of fluid in the reservoir. - A continuous and closed drainage path induces flow by gravity. - Atmospheric pressure becomes the driving force pushing the fluid through the tube to the lower point of discharge. - Path of siphon tube is irrelevant to the fluid’s ability to flow, i.e. could be flat and level. Traditional roof drainage Siphonic roof drainage
  6. 6. Benefits of Siphonic Drainage Reduced material costs - smaller pipe diameters means less $. Reduced underslab work and building costs - level pipe installation overhead with fewer vertical stacks. Pipe locations are highly flexible (horizontal and stack). Higher flow velocity - driving head up to 100 times that of traditional system. Reduced exterior excavation, backfill and underground piping and structures. Opportunity to economically enable rainwater harvesting. Why you should consider a siphonic roof drain system: 4
  7. 7. Siphonic Roof Drain Models Function: For use in engineered siphonic roof drainage systems in flat roof of any construction. Internal air baffle creates siphonic drainage action producing a more efficient drainage than conventional roof drains. Function: For use in engineered siphonic roof drainage systems for gutters, parapets, small balconies, sills, cornices, marquees and other small overhanging areas where drainage of rainwater is required. Air baffle creates siphonic drainage action producing a more efficient drainage than conventional gutter drains. 5 Fig. no. 1005 (15 ¼” diameter) Fig. no. 1605 (6” diameter) Regularly Furnished: Duco Cast Iron Body, Flashing Clamp, Air Baffle and Polyethylene Dome. Available with Male Thread and No-Hub Outlets Outlet Sizes: 2”, 2 ½”, 3” and 4” Regularly Furnished: Duco Cast Iron Body with Combination Flashing Clamp and Air Baffle. Available with Male Thread and No-Hub Outlets Outlet Size: 2”
  8. 8. Siphonic Roof Drain Models Sizing is a function of the roof runoff factor, design rainfall intensity and the area draining to the roof drain . 6 Product data is provided to the specifier for outlet size selection and hydraulic calculations. Fig. no. 1005 (15 ¼” diameter)
  9. 9. Installation Fig. no. 1005, Low Profile Dome 7 Product design uses all existing installation accessories. Standard installation procedures apply. Poured Concrete Drain set in poured roof deck slab. Flashing is secured by a non-puncturing flashing clamp. Precast Deck Drain with underdeck clamp -C used where roof drain openings are presleeved or sawed-out in the slab. May be used in any slab or deck. NOTE: Drain flange rests in a recessed portion of the deck, eliminating sump receiver. Insulated Deck Drain with sump receiver -R and underdeck clamp -C. The sump receiver is a square metal plate that accepts the drain body flange and eliminates the puddle of water surrounding the drain. Gutter drain set in poured roof deck slab. Flashing is secured by a non-puncturing flashing clamp. Fig. No. 1605 Low Profile Gutter Drain
  10. 10. Applications Siphonic systems are especially ideal for low rise buildings with large footprints and flat roofs such as: Airport Terminals Convention Centers Aircraft Hangers Warehouses Covered malls Factories Train Stations Office Complexes Retail Distribution Centers 8
  11. 11. Cost Savings 7,840 sq. ft . - Roof surface 3.25 in/hr - Rainfall intensity Traditional: 5 inch – pipe size (IPC 2000, table 1106.2), 52% full $843 – cost for 10 feet of pipe and 1 inch insulation 3 inch – siphonic pipe size $610 – cost for 10 feet of pipe and 1 inch insulation 28% savings 51% savings 58% savings 63,940 sq. ft . - Roof surface 3.25 in/hr - Rainfall intensity Traditional: 12 inches – pipe size (IPC 2000, table 1106.2), 25% full $1,488 – cost for 10 feet of pipe 8 inches – pipe size $627 – cost for 10 feet of pipe 9 Plus additional savings in ground work and exterior underground piping. 15,685 sq. ft . - Roof surface 3.25 in/hr - Rainfall intensity Traditional: 10 inches – pipe size (IPC 2000, table 1106.3), 52% full $1,057 – cost for 10 feet of pipe and 1 inch insulation 6 inches – siphonic pipe size $515 – cost for 10 feet of pipe and 1 inch insulation 3. Vertical Stacks 1. Roof Drain & Branch 2. Horizontal Manifolds
  12. 12. Case Studies Siphonic systems customers include institutional, commercial and retail facilities. 10 Boston Convention Center, Boston, MA IKEA Home Furnishings, Stoughton,MA IKEA Home Furnishings, Bloomington, MN IKEA Home Furnishings, Atlanta, GA
  13. 13. Case Studies 11 Boston Convention and Exhibition Center, South Boston, MA Siphonic Solution Traditional Gravity System
  14. 14. Case Studies 12 Boston Convention and Exhibition Center, South Boston, MA
  15. 15. Case Studies 13 IKEA Home Furnishings, Stoughton, MA
  16. 16. Case Studies 14 IKEA Home Furnishings, Stoughton, MA
  17. 17. Case Studies 15 IKEA Home Furnishings, Bloomington, MN
  18. 18. Case Studies 16 IKEA Home Furnishings, Bloomington, MN Siphonic Piping Overhead in Merchandise Warehouse: Maximum Clear Height
  19. 19. Case Studies 17 IKEA Home Furnishings, Bloomington, MN Drawing Detail Installation
  20. 20. Case Studies 18 IKEA Home Furnishings, Atlanta, GA
  21. 21. Case Studies 19 IKEA Home Furnishings, Atlanta, GA Service road and rear of store where storm drainage is piped to retention pond off site.
  22. 22. Listings/Certifications Note: Hydraulic tests were performed at CRM Laboratory, United Kingdom, under the supervision of HR Wallingford, on a test rig conforming to the ASME Standard A112.6.9-2005. IAPMO Listed. 20 Fully tested and certified in accordance with ANSI/ASME A112.6.9 “Siphonic Roof Drains”
  23. 23. Engineering Resources “ Selling the Concept” is primarily an RMS effort. We have started this effort and will continue to do so. RMS has developed a software package to simplify design, assure consistency and enhance accuracy of the results. Initial design services would be by RMS to assure quality and accuracy. Other engineers will be trained by RMS to design systems and use the software. This approach differs significantly from the current competition . They intend to keep design in house thereby depriving engineers and contractors of limited budget. Clients will resist this and favor the Smith/RMS approach. Contractors and engineers will typically seek out available products to apply siphonic roof drainage on their projects. Inquiries by your customers about engineering/design should be referred to RMS for more information. Inquiries by our clients about product availability will be referred to Jay R. Smith or local representatives. 21 We support open specification and in-house capability, not proprietary outsourcing methods.
  24. 24. Siphonic Roof Drainage Benefits Summary 22
  25. 25. Summary It’s Been Done. It Works. It Saves Money. 23

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