MultiDrain Systems, Inc. #8 EconoDrain and EconoDrain PT-3 Hydraulic Data. We drain your site, not your budget!

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1 #8 EconoDrain and EconoDrain PT-3 Hydraulic Data MultiDrain Systems, Inc. We drain your site, not your budget! Copyright July 2008 MultiDrain Systems, Inc.

2 System and Hydraulic Data: # 8 EconoDrain and #8 EconoDrain PT-3 EconoDrain Series EPS Trench Forming System By MultiDrain Systems, Inc. Thank you for using our family of EPS Trench Forming products in your current and future projects. Our trench systems are engineered to conform to material and project specific specifications. MultiDrain Systems is dedicated to continuous product improvement with an eye to fit, form and function and the ever important cost \ benefit analysis. The following system and hydraulic data provides an overview of the following information: o System Grating Inflow Table and Graphical Representation Material Specification Grating Load Capability Specification Grating Dimensions Grate Open Area o Trench Flow Capacity Table and Graphical Representation Trench Flow Capacity at 0.5% and 1.0% slope Trench Section Depths at 0.5% and 1.0% slope Trench Section Storage Capacity at 0.5% and 1.0% trench slope Adjustment factors, F k, used to consider site slope and its effect upon trench capacity Adjustment factor, F k, sample calculation o Outlet Pipe Discharge Flow Graphical Representation PVC Outlet Pipe Discharge This information generally answers 99% of the project inquiries satisfactorily. If you need more information, we will be happy to address your questions. Please do not hesitate to let us know how we may serve your needs better. Thank you again for using MultiDrain Systems family of products. Our contact information is: MultiDrain Systems, Inc. P.O. Box 88 Barium Springs, NC Toll Free: (800) or (704) Fax: (704) t.drain@multidrainsystems.com You may view all of our product information at

3 #8 EconoDrain Standard Cast Ductile Grating Grate Part No.: EG10241DIA [Finish: Black (Std.)] EG10241DIAG [Finish: Galvanized] Grate Length: 2 ft. (24 in.) Grate Open Area: 71% Grate Open Area (sq. in. / l.ft) 85.4 Inflow per Grate From Inflow per Grate From Inflow per Grate From Inflow per Grate From Head (in) Both Sides of Trench Both Sides of Trench One (1) Side Only One (1) Side Only EG10241DIA (gpm) EG10241DIA (cfs) EG10241DIA (gpm) EG10241DIA (cfs) 1/4" /2" " " " /2" 1, " 1, , /2" 2, /2" 2, " 2, " 2, Note: A. Inflow is calculated utilizing weir and orifice equations. Head (ft.) is the depth of water above the grate surface. B. Weir Flow is modified to use only the length perimeter. Width perimeters are not considered since trench grates are normally laid end to end and not utilized as a stand alone grating. C. Calculated Inflow is based on fluid flow from both directions (weir) and is stated for one grate length. D. No allowance is made for debris clogging the grate. E. Weir Flow to Transitional at 0.36' head - Flow from Both Sides. F. Transitional to Orifice flow at 0.54' head - Flow from Both Sides. G. Diminished calculated flow accuracies at heads less than 0.1'. H. Trench Channel flows from 0.57 cfs (255 gpm) to 4.65 cfs (2,089 gpm) per section at 0.5% slope [0.5" rise/96" run]. I cfs (13.0 gpm) individual grating inflow maximizes trench with open end, flowing full with a 320 l. ft. run. J. Multiply Inflow, stated in cfs or gpm, times 4 to estimate grate inflow per 8' long section. EG10241DIA Inflow

4 3,000 2,500 2,000 1,500 1, #8 Standard EconoDrain Ductile Grating Inflow, (gpm) - From Both Sides of Grate EG10241DIA (gpm) #8 Standard EconoDrain Grate: EG10241DIA Series Material: ASTM A Ductile Iron Load Specification: AASHTO M HS25 Grate Dimensions: 1.5" x 10" x 24" Grate Open Area: 71% Grate Open Area: sq. in. 1/4" 1/2" 1" 2" 3" 4-1/2" 6" 7-1/2" 9-1/2" 11" 12" Head of Water Above Grating, (inches) EG10241DIA Inflow Fluid Inflow, (gallons per minute)

5 #8 EconoDrain ADA Cast Ductile Grating Grate Part No.: EG10161DIADAC [Finish: Black (Std.)] EG10161DIADACG [Finish: Galvanized] Grate Length: 1.33 feet (16 in.) Grate Open Area: 33.1% Grate Open Area (sq. in. / l.ft) 39.7 Inflow per Grate From Inflow per Grate From Inflow per Grate From Inflow per Grate From Head (in) Both Sides of Trench Both Sides of Trench One (1) Side Only One (1) Side Only EG10161DIADAC (gpm) EG10161DIADAC (cfs) EG10161DIADAC (gpm) EG10161DIADAC (cfs) 1/4" /2" " " " /2" " /2" /2" " " Note: A. Inflow is calculated utilizing weir and orifice equations. Head (ft.) is the depth of water above the grate surface. B. Weir Flow is modified to use only the length perimeter. Width perimeters are not considered since trench grates are normally laid end to end and not utilized as a stand alone grating. C. Calculated Inflow is based on fluid flow from both directions (weir) and is stated for one grate length. D. No allowance is made for debris clogging the grate. E. Weir Flow to Transitional at 0.16' head - Flow from Both Sides. F. Transitional to Orifice flow at 0.25' head - Flow from Both Sides. G. Diminished calculated flow accuracies at heads less than 0.1'. H. Trench Channel flows from 0.57 cfs (255 gpm) to 4.65 cfs (2,089 gpm) per section at 0.5% slope [0.5" rise/96" run]. I cfs (13.0 gpm) individual grating inflow maximizes trench with open end, flowing full with a 320 l. ft. run. J. Multiply Inflow, stated in cfs or gpm, times 4 to estimate grate inflow per 8' long section. EG10161DIADA Inflow

6 #8 EconoDrain ADA Ductile Grate Inflow, (gpm) - From Both Sides of Grate EG10161DIADAC (gpm) EconoDrain Grate EG10161DIADAC Series Material: ASTM A Ductile Iron Load Specification: AASHTO M HS25 FAA AC 150/5320-6D, Appendix 3, 100,000 lb. Proof Load Grate Dimension: 1.5" x 10" x 16" Grate Open Area: 33.1% Grate Open Area: 52.8 sq. in. 1/4" 1/2" 1" 2" 3" 4-1/2" 6" 7-1/2" 9-1/2" 11" 12" Head of Water Above Grating (feet) EG10161DIADA Inflow Fluid Inflow, (gallons per minute)

7 #8 EconoDrain PT-3 Cast Ductile Grating Grate Part No.: EG10243DIA [Finish: Uncoated] EG10243DIAP [Finish: Black] EG10243DIAG [Finish: Galvanized] Grate Length: 2 ft. (24 in.) Grate Open Area: 54% Grate Open Area (sq. in. / l.ft) 64.7 Inflow per Grate From Inflow per Grate From Inflow per Grate From Inflow per Grate From Head (in) Both Sides of Trench Both Sides of Trench One (1) Side Only One (1) Side Only EG10243DIA (gpm) EG10243DIA (cfs) EG10243DIA (gpm) EG10243DIA (cfs) 1/4" /2" " " " /2" 1, " 1, , /2" 1, /2" 1, " 1, " 1, Note: A. Inflow is calculated utilizing weir and orifice equations. Head (ft.) is the depth of water above the grate surface. B. Weir Flow is modified to use only the length perimeter. Width perimeters are not considered since trench grates are normally laid end to end and not utilized as a stand alone grating. C. Calculated Inflow is based on fluid flow from both directions (weir) and is stated for one grate length. D. No allowance is made for debris clogging the grate. E. Weir Flow to Transitional at 0.35' head - Flow from Both Sides. F. Transitional to Orifice flow at 0.5' head - Flow from Both Sides. G. Diminished calculated flow accuracies at heads less than 0.1'. H. Trench Channel flows from 0.57 cfs (255 gpm) to 4.65 cfs (2,089 gpm) per section at 0.5% slope [0.5" rise/96" run]. I cfs (13.0 gpm) individual grating inflow maximizes trench with open end, flowing full with a 320 l. ft. run. J. Multiply Inflow, stated in cfs or gpm, times 4 to estimate grate inflow per 8' long section. EG10243DIA Inflow

8 2,500 2,000 1,500 1, #8 EconoDrain PT-3 Grate Inflow, (gpm) - From Both Sides of Grate EG10243DIA (gpm) #8 EconoDrain PT-3 Grate: EG10243DIA Series Material: ASTM A Ductile Iron Load Specification: AASHTO M HS25 & FAA AC 150/5320-6D, Appendix 3, 100,000 lb. Proof Load & Modified Specification for 200,000 lb. Proof Load Grate Dimensions: 1.5" x 10" x 24" Grate Open Area: 54% Grate Open Area: sq. in. 1/4" 1/2" 1" 2" 3" 4-1/2" 6" 7-1/2" 9-1/2" 11" 12" Head of Water Above Grating, (inches) EG10243DIA Inflow Fluid Inflow, (gallons per minute)

9 Trench Flow Capacity MultiDrain Systems, Inc. #8 EconoDrain and #8 EconoDrain PT-3 Trench Forming System Standard EPS Forms with Trench 0.5%, Radius Bottom Trench Modified EPS Forms with Trench 1.0%, Radius Bottom Trench Std. EPS #8 Trench Flow #8 Trench Flow Std. Section Depth Section GPM Slope EPS #8 Trench Flow #8 Trench Flow Section Depth Section GPM Slope Section Std. Slope =0.5% Std. Slope =0.5% Slope = 0.5% Storage Adjustment Section (Slope =1.0%) (Slope =1.0%) Slope = 1.0% Storage Adjustment (cfs) (gpm) (in) (US Gals) Factor, Fk (cfs) (gpm) (in) (US Gals) Factor, Fk to , A to , to , A to , to , A to , to , A to , to , A to , to , A , to ,644 Shallow to , A , to , to , A , to ,304 EPS to , A , to , to , A , to ,985 Forms to , A , to , to , A , to , to , A , to , to , A , to , to , A , to , to , A , to , to , A , to , , to , A , to , , to , A , to , , to , A , to , , to , A , to , , to , A , to , , to , A , to , , to , A , to , , to , A , to , , to , A , to ,734 Deep , to , A , to , , to , A , to ,468 EPS , to , A , to , , to , A , to ,203 Forms , to , , to , , to , , to , , to , , to , , to , , to , , to , , to ,545 Table ED 8 Hyd - 01

10 Trench Slope Adjustment Factor, F k MultiDrain Systems, Inc. Slope Adjustment Factor, F k Proper evaluation of trench flow capacity must take finished grade site slope into consideration. Site slope parallel to trench slope may have a positive or negative effect on trench flow capacity. Regardless, it is important to evaluate its effect to assure either an adequate trench depth and slope is being installed or just to maximize efficiency and cost of the installed trench as it relates to the desired design flow parameters. Trench flow capacity shown in the accompanying table and graphs is determined by applying Mannings Equation for the standard EconoDrain trench slope of 0.5% and surface roughness coefficient of The trench section outlet end area is utilized in the equation and the area occupied by the grating or cover is excluded. Application of the Slope Adjustment Factor, F k is applied according to Equation A: Q = (F k ) x (S s + S t ) 1/2 (equation A) Where: Q equals trench flow in gallons per minute (gpm) F k is the slope adjustment factor from the system Trench Flow Capacity table S s is the site slope, feet per feet (dimensionless) S t is the trench slope, feet per feet (dimensionless) Example 1 A standard EconoDrain # 8 trench is to be installed in a concrete slab with an additional 0.2% slope parallel and in the diection of trench flow. The trench length is 40 feet and will traverse the full length of the concrete slab. The desired design flow capacity at the end of the trench is 900 gpm. Determine the proper trench size for the given conditions. Trench sectiin 0820 has a trench flow of 894 gpm (1.99 cfs) per Table ED 8 HYD-01. Five trench sections will be required to fulfill the 40' trench length requirement. Test the capacity of Trench section 0820 by applying the Slope Adjustment Factor, F k: F k from the Trench Flow Capacity Table ED 8 HYD-01 for section 0820 is: 12,636 S t = NOTE: gallons per minute (gpm) is converted to cubic feet per second (cfs) by dividing the gpm result S s = by Q = 12,636 x ( ) 1/2 Q = 1057 gpm The results yield a 17.4% flow capacity increase due to additional site slop.

11 Trench Slope Adjustment Factor, F k MultiDrain Systems, Inc. Now, test a section having a flow capacity of approximately 747 gpm or about 83% of the targeted flow of 900 gpm. Section 0817 trench flow capacity is given on Table ED 8 Hyd-01 as 753 gpm. Determine the value for F k from the same table. Test Trench Section 0817, having a F k equal to 10,644, utilizing Equation A. Q = 10,644 x ( ) 1/2 Q = 890 gpm. Trench Section 0817 falls short of the targeted flow criteria of 900 gpm. Try to get closer to the target flow by testing section Test Trench Section, 0818, having a F k equal to 11,306. Q = 11,306 x ( ) 1/2 Q = 945 gpm. This test indicates Trench Section 0818 can be utilized to attain a minimum flow capacity of at least 900 gpm. Therefore Trench Sections 0814 to 0818 will be used to form the 40 lineal foot trench drain. The overall trench depth will be from 10 in. to 12.5 in. Trench discharge flow will be 945 gpm. The trench flow can be expressed in cubic feet per second (cfs) by multiplying the flow expressed in gpm by the multiplier Therefore 945 gpm is equivalent to 2.1 cfs. Q.E.D.

12 ,500 2,000 1,500 1, Trench Flow Capacity - EconoDrain # 8 Trench Drain System, Slope = 0.5% Trench Section Part Number Trench Flow Capacity (gpm) Trench Flow Capacity (cfs) (gpm) (cfs)

13 0835A 0834A 0833A 0832A 0831A 0830A 0829A 5,000 4,500 4,000 3,500 3,000 2,500 2,000 1,500 1, Trench Flow Capacity - EconoDrain # 8 Trench Drain System, Slope = 1.0% 0813A 0814A 0815A 0816A 0817A 0818A 0819A 0820A 0821A 0822A 0823A 0824A 0825A 0826A 0827A 0828A Trench Section Part Number A 0811A 0810A 0809A 0808A 0807A 0806A Trench Flow Capacity (gpm) Trench Flow Capacity (cfs) (gpm) (cfs)

14 25,000 20,000 15,000 10,000 5,000 - Q, PVC Pipe Flow Discharge, (gpm) Discharge (gpm), S=0.5% Discharge (gpm), S=1.0% Discharge (gpm), S=3.0% Discharge (gpm), S=4.0% Discharge (gpm), S=5.0% PVC Pipe Sizes Shown for Comparative Estimates Only NOTE: Local Engineering Evaluation should be performed based on actual pipe layout geometry. Q, Pipe Flow Discharge based on Mannings Equation. Assumes Pipe is flowing full. N = 0.009, S = Pipe Slope Head Losses are not included in Discharge value Nominal Pipe Size, (in.) Q, Pipe Discharge, (gpm)

15 Project: Date: Contact: MultiDrain Systems, Inc. We Drain Your Site, Not Your Budget! P.O. Box 88, Barium Springs, NC P: (704) or toll free: (800) F: (704) or at: drawn by:

16 MultiDrain Systems, Inc. We drain your site, not your budget! Makers of: EconoDrain EPS Trench Forming System EconoDrain PT-3 EPS Trench Forming Systems for Airports\Ports\DOT\Intermodal MultiDrain Steel Trench Drain Systems Alfa Channel Polymer Concrete Trench Drain The reported properties and data contained in this publication are based on accepted practices, measurement and evaluation. They are intended as guidelines for the sole use by MultiDrain Systems, Inc. customers and are not meant to circumvent regional or local conditions or engineer s evaluation. Information and data may be changed or amended at any time and without notice to the user. The information and data made available in this bulletin are provided as is without warranties or guarantees of any kind. Furthermore, any person who accesses such information, data, or material disclaims all liability for damages, costs and expenses, and agrees that there are no remedies for negligence, or under strict liability, or for breach of warranty or contract, including, but not limited to, indirect, consequential, punitive or incidental damages, even if notice was given of the possibility of such damages. P.O. Box 88 Barium Springs, NC Phone: or Toll Free (800) Fax: t.drain@multidrainsystems.com