Roof & Deck Drain SelecƟon 09/01/16 Wade Drains - 11910 CR492, Tyler, TX, 75706 - Phone: 800-638-9537 Fax: 888-879-9233 - www.wadedrains.com 1 Specification Drainage Products Roof Drains—Product Compliance Wade roof drains are constructed of high quality materials, and in general, are designed to meet the requirements of ASME Standard A112.6.4. General Information: Primary roof drains are comprised of three basic components: (1) A body (sump) (2) a combination flashing clamp/gravel guard and (3) a dome strainer.
Cast Iron: Conforms to ASTM specifica on for Gray Iron Cas ngs A-48-83, Class 20 or 25. It is a rela vely high silicon iron with a high degree of strength and corrosion resistance.
Duc le Iron: Conforms to ASTM specifica on A 536-84 Grade 60-45-10. This nodular iron material has corrosion resistance superior to that of gray iron and exhibits remarkable stress quali es with yield factors in the same range as cast carbon steel and also maintaining the ability to absorb shock loading. This material is excellent where heavy duty service is a requirement.
Proper es of Duc le Iron Versus Cast Iron
Wade CI/DI Coa ngs: Cast iron and duc le iron coa ngs are normally furnished with a specially formulated enamel paint designed to resist cracking and chipping plus offering a high resistance to rus ng.
A.R. Acid Resistant Coa ng: is a common baked-on powder coa ng which produces a smooth, hard, high gloss finish. The epoxy based coa ng offers high impact resistance and excellent life in drainage applica ons. Wade A.R. coa ng conforms to the requirements of FDA regula on 21-CFR5 117.1360.
A.R.C. Acid Resistant Coa ng from Wade is typically furnished in a high build alipha c hybrid – trade named ArmorClad. It is an industrial abrasion - chemical - impact - moisture—UV resistant sanitary finish engineered for use on cri cal surfaces in harsh environments. A two component no-voc formula on delivers op mal performance in very cold or hot climates. ArmorClad is dielectric (non-conduc ve) so there is no poten al reac on with the earth’s elements. Because of its’s dielectric proper es, performance is excep onal in all forms of corrosive elements that may be present in underground environments. Because it is non-sacrificial, the finish insulates metallic products from corrosive elements including salt spray. A 100% solids characteris c helps to ensure a complete barrier is formed for protec on. The alipha c hybrid content of ArmorClad provides UV resistance well beyond what aroma c coa ngs can offer. Accelerated UV Aging test over extended
me are ongoing to qualify the significant improvements. Available in Red, White, Black or Gray.
Material Cast Iron Duc le Iron
Specifica on Class 25 60-45-10
Tensile Strength (PSI) 25/30,000 60/80,000
Yield Strength (PSI) NIL 45/60,000
Elonga on NIL 10% to 25%
Modules of Elas city 16 x 10 24 x 10
A.R.E. (Porcelain): Acid resis ng Porcelain Enamel is a substan ally vitreous or glassy inorganic coa ng bonded to metal by fusion at temperatures in excess of 800ºF. This exclusive coa ng is normally supplied on floor sinks. A.R.E. porcelain is extremely hard, offers unmatched sanita on proper es and is acid, abrasion and wear resistant. Conforms to F.D.A (Food and Drug Administra on) Regula on 21-CFR5 117.1360.
Aluminum: Cas ngs are Grade 319, which is an alloy containing both silicon and copper. It is a solid cast material with a light gray appearance. The light weight coupled with its excep onal strength and corrosion resistance, makes Wade aluminum cas ngs ideal for drain components such as sediment buckets and strainers.
Bronze: This is a semi-red brass conforming to ASTM Specifica on for Copper Alloy Sand Cas ng, Ingot No.84400 or 83600. Exposed surfaces for products designated Sa n Bronze are furnished with a sheen texture which allows it to blend unobtrusively with surrounding finishes. When required, this material can be furnished polished to a high gloss.
Chrome Pla ng: Chrome pla ng is more reflec ve (brighter), bluer (less pale), and more spectacular than other finishes. Chrome is applied by electropla ng. Our process is decora ve chrome pla ng, some mes called nickel-chrome pla ng because it involves electropla ng nickel onto the object before pla ng the chrome. The nickel pla ng provides the smoothness, much of the corrosion resistance, and most of the reflec vity. The chrome pla ng is excep onally thin and the product surfaces are highly polished before the electropla ng is applied. This finish is not recommended for areas subjected to traffic because abrasion will eventually wear through and cause peeling. It should always be specified for swimming pool applica ons for resistance to chemicals encountered in the pool maintenance.
Galvanized: This is a process of applying a heavy zinc coa ng to a thoroughly cleaned cast iron or duc le iron cas ng. This coa ng contains 95% zinc in a thermal process and is recommended wherever discolora on caused by oxida on of cast iron is objec onable, or in costal or industrial areas where corrosive atmospheres are present. This coa ng meets or exceeds Federal specifica on MIL-P-21035, MIL-P-26915A, MIL-P-26433 and MIL-C-10578 (Type II). It also meets ASTM specifica on A239-89.
Nickel Bronze: This unique material is ideally suited for high traffic finished floor areas. It offers higher strength, be er appearance and longer service life than chrome pla ng. The material is a copper nickel alloy 97300 or 97600. The appearance is similar to sa n chrome pla ng, but will not chip, crack or peel off. It is highly resistant to corrosion; A slight oxidiza on will naturally occur over me.
Stainless Steel: For cas ngs, Wade typically uses Type CF8 (304) which is an 18-8 Austeni c Stainless providing excellent corrosion resistance. For some applica ons, CF8M (316) stainless steel can be supplied when specified. For fabricated stainless steel products, Type 304 is normally provided with Type 316 as an op onal material.
Roof Drain Selection & Placement Wade makes it easy to size roof drains. The four things you will need to know are: 1) Rate of precipita on 2) Total area of roof 3) Size of leader required 4) Area handled by each drain When sizing roof drains, the limi ng factor for the amount of water each drain will carry away is the size of leader. Therefore, increasing leader size decreases the number of drains required.
STEPS FOR SELECTING ROOF DRAIN LEADER SIZES AND QUANTITY REQUIRED FOR A GIVEN ROOF
STEP Requirement Example
1 Calculate Total Roof Area Total Roof Area—500’ by 270’ equals 135,000 Sq.Ft. 2 Determine maximum hourly rainfall in inches For this example—Use 4” per/hr 3 Select Leader Size Assume that 6” leaders are desired for this job
4 From Table 1, Determine the square feet that can be drained by one 6” roof leader at the maximum 4” hourly rainfall rate
From Table 1 One 6” Leader at 4” hourly rainfall rate will drain 13,500 square feet of roof area.
5
Divide the total roof area by the area that one 6” leader will accommodate. The result is the number of drains required for the building. If the result is frac onal, use the next higher number
135,000 Square Feet (Total Roof Area) divided by 13,500 Square Feet (Maximum Rate for 6” Drain at 4” per hour)
135,000 / 13,500 = 10 (10 Drains Required)
TABLE 1 ROOF DRAIN VERTICAL LEADER REQUIREMENTS FOR ROOF AREAS AT VARIOUS RAINFALL RATES
Alternative Sizing Method (Using Gallons Per Minute) Establish the maximum anticipated traffic (loading) which will pass over the grate and select the grate type which will support that load. Each drain shown in the floor drain section has a description listing the type of load it will take. The categories listed are for vari-ous drains in respect to grate loading. The load classifications are in accordance with the American National Standards ASME A112.6.1M. ASME Ratings are as follows in Table 2:
STEPS FOR CALCULATING DRAINAGE REQUIREMENTS USING GALLONS PER MINUTE (G.P.M.)
1. Use the following formula to determine G.P.M.
G.P.M. = 0.0104 X R X A
R = Rainfall intensity—inches/hour
A = Roof Area—Square Feet
0.0104 = Conversion Factor—G.P.M./Sq.Ft. for 1”/Hr Rainfall
Selection of Top (Based on Anticipated Traffic) Establish the maximum anticipated traffic (loading) which will pass over the grate and select the grate type which will support that
load. Each drain shown in the deck drain section has a description listing the type of load it will take. The categories listed are for
various drains in respect to grate loading. The load classifications are in accordance with the American National Standards ASME
A112.21.2M. ASME Ratings are as follows in Table 5:
Load Classification ASME A112.21.2M
Safe Live Load
Light Duty Under 2,000 Lb
Medium Duty 2,000 - 4,999 Lb
Heavy Duty 5,000 – 7,499 Lb
Extra Heavy Duty 7,500 – 10,000 Lb
Special Duty Over 10,000 Lb
Table 5
Conditions of use, load concentrations, installations, etc., can affect results and service. For unusual applications, consult the factory. After the weight loading capacity is established, a suitable drain can be selected.
Deck Drains
Deck Drain Selection & Placement
Deck drains receive liquid from surrounding areas and by the attached piping, convey the liquid to the storm or sanitary drainage system. Deck drains are designated for outside areas where rainfall intensity dictates sizing. Drains should be selected with sufficient top size and grate free area to pass the anticipated flow. Grate free area is defined as "the total area of the drainage openings in the grate." The drain outlet should be sized large enough so that it will safely pass the maximum flow through the grate, without creating water buildup.
Sizing and Location – For most locations, the grate free area should be determined from Table 4 (ASME A112.21.2M). The
number and location of drains are based on the configuration of the deck plan, type of operation and location of equipment. Location and number of deck drains required can be determined only after careful review of the plans and anticipated use. See roof drain section for rainfall and sizing data.
A roof drain for installation in parapets for conveying rainwater from the roof through the parapet..
Sizing and Location – For most locations, the grate free area should be determined from Table 7 (ASME A112.21.2M). The
number and location of drains are based on the configuration of the roof plan, type of operation and location of equipment. Location and number of balcony drains required can be determined only after careful review of the plans and anticipated use. See roof drain section for rainfall and sizing data.
A roof drain for installation in gutters, cornices, balconies and other overhanging construction used to prevent overflow to areas adjacent to or below.
Sizing and Location – For most locations, the grate free area should be determined from Table 6 (ASME A112.21.2M). The
number and location of drains are based on the configuration of the deck plan, type of operation and location of equipment. Location and number of balcony drains required can be determined only after careful review of the plans and anticipated use. See roof drain section for rainfall and sizing data.
After the weight loading capacity is established, a suitable drain can be selected.
Selection of Top Material
(Unfinished Areas)
Drains located in heavy traffic areas should be specified with heavy duty ductile iron grates. In areas where shock loads are
anticipated, a ductile iron grate is more desirable in lieu of cast iron. Cast ductile iron is acceptable for most unfinished areas such as
warehouses, loading docks, boiler rooms and similar areas.
(Finished Areas)
Most drains are available with nickel bronze, bronze or stainless steel tops to match the surrounding trim in finished areas. Usually
finished areas require light duty or medium duty tops.
(Finished Areas with Increased Load)
Many finished floor areas are subject to increased loadings. Examples are convention centers, equipment showrooms and industrial
plants. Heavy duty cast iron grates can be specified with bronze or nickel bronze veneered tops.
Top Shape – Round or square styles are available to blend with all types of construction and deck patterns. The round top is the most
flexible type since it can be easily oriented to most floor patterns.
In areas subject to vehicular traffic, secured grates are preferred. In parking garages which see vehicular traffic as well as pedestrian
traffic, a heel proof grate is available. Heel Proof incorporates narrower slots or holes – normally 5/16” .
Deck Drains
Roof and Deck Drains (Op ons & Varia ons)
Adjustable Water Regulator (-AW) Used in flat roof construction, the adjustable standpipe permits adjustment to a maximum of 4” to easily accommodate varying overflow conditions. The positive thread engagement allows smooth perimeter movement.
Flush Grate (-FG) For use in promenade roof decks and rooftop recreational areas where traffic bearing pavers are to be applied. The drain is installed under the pavers and the slotted grate prevents debris from entering the drain.
Adjustable Extension (-ADF) The Wade roof and deck drains are available with adjustable extensions to accommodate various insulation thicknesses commonly used in roof or deck construction. Used in flat roof construction, the adjustable sleeve permits adjustment from a minimum of 1-3/4” to a maximum of 3-1/2” to easily accommodate varying insulation thicknesses. The positive thread engagement allows smooth perimeter movement.
The Suffix “E” designates a wide flange that can be furnished on certain Wade roof or deck drains. This flange receives the
membranes and coatings of a waterproof floor covering system. These coverings are thin coatings which are installed in a series of
trowel coats. The covering forms its own membrane, flashing and durable traffic surface. The wide flange is regularly furnished 4"
wide. The usual covering is approximately 3/16" thick and may be applied over many subsurface types such as concrete, gypsum or
wood decks. This type of covering is particularly adaptable to flat roofs which are used for recreational purposes, balconies, area
ways, plazas, sun decks, floors and corridors.
When a “E” flange is required on drains other than those shown in the catalog, the Suffix “E” must be used with the model number.
The flange will be 4" wide (minimum).
Roughing dimensions of the body must be adjusted accordingly. The drain body should be set low enough to permit "dimpling" of
the area surrounding the drain.
Adjustable Drain Riser (-AE) The Wade roof and deck drains are available with adjustable drain risers to accommodate various insulation thicknesses commonly used in roof or deck construction. Used in flat roof construction, the adjustable drain riser sleeve permits adjustment from a minimum of 1” to a maximum of 6” to easily accommodate varying insulation thicknesses. The positive thread engagement allows smooth perimeter movement. A large bearing surface ring eliminates the need for sump receivers.
Less Gravel Stop (-LGS) For use in roof systems that utilize a polymer sheet membrane. Typically these roof systems do not rely on gravel as a ballast. The smooth flashing ring allows for unobstructed flow to the drain.
Adjustable Internal Overflow Dam (-DFS) Used in flat roof construction where a constant water depth is desired or for an emergency overflow if the primary drain becomes clogged or is inadequate for the flow conditions. The plastic threaded standpipe can be easily modified for various overflow depths.
Stainless Steel Mesh Covered Dome (-50) For use in roof systems that encounter small debris or pea gravel which may otherwise pass through the gravel stop and dome. It is also ideal for planting areas.
Side Outlet Body (-SO) Used in flat roof construction where space is limited under the roof structure. The compact design incorporates a slopped side outlet.
Adjustable Extension (-DF) The Wade roof and deck drains are available with fixed extensions to accommodate various insulation thicknesses commonly used in roof or deck construction. Used in flat roof construction, the fixed sleeve easily accommodates typical insulation thicknesses. Available in 1”, 2”, 3” and 4” heights. Units are stackable for heights exceeding 4”.
Perforated Extension (-DFS) Used in roof systems where the insulated membrane assembly method of waterproofing is used. This method, commonly termed “IRMA” relies on a perforated stainless steel sleeve to retain the crushed gravel ballast used to secure the insulation. Available in various heights to accommodate various insulation thicknesses. 2”, 3” and 4” heights standard.
Perforated Extended Gravel Stop (-DP) Used in roof systems where the insulated membrane assembly method of waterproofing is used. This method, commonly termed “IRMA” relies on a perforated stainless steel sleeve to retain the crushed gravel ballast used to secure the insulation. 4” height standard. Additional heights Optional.
Overflow Dam (-D) Used in flat roof construction where a constant water depth is desired or an emergency overflow if the primary drain becomes clogged or is inadequate for the flow conditions. The dam keeps debris away from the dome and accommodates more overflow drainage with less head build-up.
Under Deck Clamp (-53) Normally used on all roof systems except poured-in-place installations, the underdeck clamp firmly secures the drain to the roof structure thereby eliminating the movement caused by expansion an contraction transferring to the membrane.
Adjustable Drain Riser (-EB) Used in flat roof construction, this adjustable drain riser permits adjustment by means of threaded rods to easily accommodate varying insulation thicknesses.
Bearing Pan / Sump Receiver (-52) or (-189) The Wade bearing pan / sump receiver allows for flush installa on of the roof drain body, elimina ng ponding around the drain. A recess in the pan accepts the body and clips on the underside firmly secure the drain. This unit eliminates the need for underdeck clamps as it can be Tek screwed to the deck upon installa on.
