Specification Drainage Engineering Guide Roof Drains

1 Specification Drainage Engineering GuideRoof by: BEST MATERIALS LLC, Phoenix AZPh: 800-474-7570, 602-272-8128 Fx: 602-272-8014 Email: PLUMBING PRODUCTS GROUPSPECIFICATION Drainage OPERATION, 1801 PITTSBURGH AVENUE, ERIE, PA 16502 PHONE 814/455-0921 FAX: 814/454-7929 WEBSITE: 1 roof DRAINSINTRODUCTIONAll building roofs are subject to destructive effects of sun, rain, snow, seasonal weather changes, ventilation system, exhaust air,ventilationunder the roof , roof loading, traffic on the roof , acid-laden smoke, and the abrasive action of dust and grit borne by high velocity wetting and drying,freezing and thawing caused by water lying on the roof causes expansion,contraction, and rotting, with damageoften extending even to the sound.

2 Comprehensive design and good materials will provide owners with trouble-free roof installation for many years, one certainmeans by which periods between repair and replacement can be importantly extended is through provision of more effective roof drainagesystems. By the simple act of draining water from the roof , many of the major causes of roofing failure can be zurn roof Drains and Drain Accessories represent more than 100 years of experience in supplying engineered roof Drainage equipment tothe construction SELECTING A roof DRAINNote:First and foremost, be sure to comply with all local plumbing select the proper roof drain, the following information must be known:1.

3 Type of roof Construction2. roof Size3. roof Pitch4. Location of Drains5. Desired Rate of Drainage6. roof Load Requirement7. Safety Load Requirement8. Volume of Expected Rainfall(Consult the Inch Per Hour Rainfall map on Page 5.) roof DRAINSZURN PLUMBING PRODUCTS GROUPSPECIFICATION Drainage OPERATION, 1801 PITTSBURGH AVENUE, ERIE, PA 16502 PHONE 814/455-0921 FAX: 814/454-7929 WEBSITE: 2Z107 Wide Deck Flange roof DrainZ10815" Diameter Deck Receptor DrainZ10015" Diameter Main roof DrainLow Silhouette DomeZ105 Control-Flo roof Drainwith Parabolic WeirZ104 Deep Sump roof DrainLow Silhouette DomeZ101 High Capacity 20" DiameterMain roof DrainLow Silhouette DomeZ12112" Diameter roof DrainLow Silhouette DomeZ11112" Diameter roof DrainFor Metal DecksZ12212" DiameterDeck Receptor DrainZ1258" Diameter roof DrainLow Silhouette DomeZ15014" Prom-Deck Drainwith Heel-Proof GrateZ1278-1/2"

4 Diameter Deck Receptor DrainZ15411" Prom-Deck Drainwith Heel-Proof GrateZ1588" Prom-Deck Drainwith Heel-Proof GrateZ1613" x 10" Oblique Scupper DrainZ160135 Scupper DrainPICTORIAL INDEXZ16315" Diameter Combination Main roof and Overflow DrainZ16412" Diameter Combination Main roof and Overflow DrainZ1658-3/8" Diameter Combination Main roof and Overflow DrainZ1804" Diameter Cornice DrainBottom OutletDistributed by: BEST MATERIALS LLC, Phoenix AZPh: 800-474-7570, 602-272-8128 Fx: 602-272-8014 Email: DRAINSZURN PLUMBING PRODUCTS GROUPSPECIFICATION Drainage OPERATION, 1801 PITTSBURGH AVENUE, ERIE, PA 16502 PHONE 814/455-0921 FAX: 814/454-7929 WEBSITE.

5 3 PICTORIAL INDEXZ1876" x 7" or 8" x 12"Oblique Scupper DrainZ1915" x 4" x 24" Downspout BootZ1895" x 6" x 11" Scupper DrainZ190 Vertical Expansion JointZ1924" x 3" Downspout BootZ196 Vent Stack Flashing SleeveZ193 Vandal-Proof Hooded Vent CapZ195 Vent Stack Flashing SleeveZ197 Riser SleeveRD2150 Replacement roof DrainZ198 Parapet Scupper SleeveZ199 Downspout NozzleZ1856" Diameter Cornice Drain90 OutletZ1816" Diameter Cornice DrainBottom OutletZ1824" Diameter Cornice Drain90 OutletZ199-DCDownspout CoverZ191-RD4" x 18" Downspout BootAvailable through zurn Light CommercialDistributed by: BEST MATERIALS LLC, Phoenix AZPh: 800-474-7570, 602-272-8128 Fx: 602-272-8014 Email: DRAINSZURN PLUMBING PRODUCTS GROUPSPECIFICATION Drainage OPERATION, 1801 PITTSBURGH AVENUE, ERIE, PA 16502 PHONE 814/455-0921 FAX: 814/454-7929 WEBSITE.

6 4 Main RoofZ100, Z100-90, Z104, Z105, Z107, Z108 High CapacityZ101 Water Insulated Main RoofZ100-AW, Z100-W, Z100-89 Medium AreaZ111, Z121, Z121-90, Z122 Inverted Membrane roof DeckZ100-85, Z100-BS, Z121-85, Z125-85 OverflowZ108, Z122, Z127, Z163, Z164, Z165 Penthouse and Small AreaZ125, Z125-90, Z127 Promenade and PatioZ150, Z154, Z158 Parapet ScupperZ160, Z161, Z187, Z189 Canopy and TerraceZ180, Z181, Z182, Z185 Expansion JointsZ190 Downspout BootZ191, Z191-RD, Z192 Vent CapZ193 Flashing Sleeves and Scupper SleevesZ195, Z196, Z197, Z198 Downspout NozzleZ199, Z199-DCAPPLICATION INDEX zurn HAS A DRAIN FOR ALL APPLICATIONSRoof drain selection should be made with a specific type of roof construction in mind.

7 The many types and sizes of Drains offered by zurn ,coupled with a wide array of available options, provide you with a roof drain for all roof DRAINZurn roof Drains are constructed of high quality materials and, in general, are designed to meet the requirements of ANSI Standard verification of a selected roof drain, contact your local zurn Sales COMPLIANCED istributed by: BEST MATERIALS LLC, Phoenix AZPh: 800-474-7570, 602-272-8128 Fx: 602-272-8014 Email: PLUMBING PRODUCTS GROUPSPECIFICATION Drainage OPERATION, 1801 PITTSBURGH AVENUE, ERIE, PA 16502 PHONE 814/455-0921 FAX: 814/454-7929 WEBSITE: DRAIN VERTICAL REQUIREMENT FOR HORIZONTALROOF AREAS AT VARIOUS RAINFALL RATES*Leader SizeHourly Rainfall In InchesPipeOpen11-1/222-1/2345678 SizeArea(Inches)(Sq.)

8 In.)Total Square Footage Covered Per ,8801,9201,4401, ,8805,8604,4003,5202,9302,2001,7601,4701 ,2601, ,40012,7009,2007,3606,1304,6003,6803,070 2,6302, ,60023,05017,30013,84011,5308,6506,9205, 7654,9454, ,00036,00027,00021,60018,00013,50010,800 9,0007,7156, ,00077,40058,00046,40038,66029,00023,200 19,31516,57014,500 Page 5 Step 2:Locate building site on map below to find rainfall :This map is taken from the National StandardPlumbing Code, Appendix A, and should only be used forgeneral reference. Consult local codes for more :For a building located in Erie, PA, the map shows a 4" hourly 3:Cross reference leader size with hourly rainfall in chartbelow to obtain roof area that can be handled by :For a 4" hourly rainfall and 4" leader,each drain can handle 4,600 sq.

9 Ft. of roof 4:Divide total roof area by area found in Step 3 to obtain thenumber of Drains :150,000 sq. ft. dividedby the 4,600 sq. ft. equals , or 33 Drains required. Thedrains should be equally spaced and located symmetricallyabout the DATA (For Conventional Drainage )STORM Drainage SIZING PRECIPITATION RATE INCHES/HOUR BASED ON 15-MINUTE PRECIPITATIONZurn makes it easy to size roof Drains . The four things you will need to know are: 1) rate of precipitation; 2) total area of roof ; 3) size ofleader required; and 4) area handled by each sizing roof Drains , the limiting factor for the amount of watereach drain will carry away is the size of leader.

10 Therefore, increasingleader size decreases the number of Drains SIZING OF zurn DRAINSStep 1:A. Calculate total roof : roof area is 300 x 500 ft; 300 x 500 =150,000 sq. Determine the size of leader to be :4" leader size is selected.*Above sizing data is offered as a Guide only. For actual applications consult local DRAINSZURN PLUMBING PRODUCTS GROUPSPECIFICATION Drainage OPERATION, 1801 PITTSBURGH AVENUE, ERIE, PA 16502 PHONE 814/455-0921 FAX: 814/454-7929 WEBSITE: 6 zurn OUTLET PIPE CONNECTIONSINSIDE CAULK (IC)Often specified where drain body is positioned on pipe, bottom ofoutlet is sealed with oakum and connection is then completedaccording to local plumbing GASKET (IG)The IG connections utilize an inside caulk