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Work Included in this Section

Download Specifications

A.        The contractor shall furnish all labor, materials, equipment and incidentals required to install, complete and ready for operation, the floating baffle curtain system indicated on the plans, and as specified herein.

B.        The intent of this item is to require an installation complete in every detail whether or not completely shown or covered by the drawings or specifications.  Consequently, the contractor will be responsible for minor details that the construction may require, or for any special construction or accessories that may be found necessary to properly install, adjust, test, and place in successful and continuous operation a complete installation.

    • Scope and Description


The floating baffle curtain described below shall consist of a fabric wall that is anchored at the bottom by a galvanized chain in a sealed pocket and is floated at the top by buoyant logs that are also in a sealed pocket.  The floating baffle curtain shall be constructed to lengths dependent upon the desired depth and length of the floating baffle curtain.  Weight and ease of handling at the job site, shall be taken into account when determining the length of the prefabricated sections.  Once the sections are delivered to the job site, the remaining fabrication shall be connecting the sections together to make the desired length.  The floating baffle curtain shall be floated into position in the event the impoundment is full of fluid, or assembled on the bottom on the impoundment should the impoundment be empty.

    • Manufacturer


The floating baffle curtain shall be manufactured by Engineered Textile Products, Inc. located at 715 Loeffler Street in Mobile, Alabama 36670-0474 and may be contacted by phone at 800-222-8277, by facsimile at 888-222-8277, or via the web-site at
Alternate manufacturers must be approved no later than 16 days prior to bid date.

    • Quality Assurance
  • The manufacturer of the floating baffle curtain shall have at least fifteen years experience in the design and construction of high quality thermoplastic products, in this case floating baffle curtains, utilizing dielectric and/or heat sealing fabrication methods.


  • The manufacturer shall have manufactured a minimum of no less than 50,000 linear feet of floating baffle curtains for tanks, ponds, and open water applications.
    • Submittals

Shop drawings and the floating baffle manufacturer shall be submitted for approval prior to manufacture of the floating baffle curtain, complete with product data with specifications covering the materials, and instructions for the installation of the floating baffle curtain.

    • Packaging

The floating baffle curtains shall be packaged onto sturdy wooden pallets designed to be moved with a forklift or similar equipment.  Each floating baffle curtain section shall be fully enclosed in heavy cardboard wrap and water-resistant film to protect from and prevent damage to the floating baffle curtain during shipment.  The package shall be prominently and indelibly marked with the floating baffle curtain section number and size unless otherwise recommended by the manufacturer.



    • Flotation

The floatation shall consist of 6” diameter closed cell poly foam logs, having the buoyancy of 60 pounds per cubic foot.  The flotation shall be completely enclosed inside the floating baffle curtain’s collar by means of a thermal seal.  Each flotation log shall be sealed in its own chamber along the flotation collar.

    • Anchoring

A.        The floating baffle curtain shall be anchored in position by a galvanized chain sealed in a thermally sealed hem at the bottom of the floating baffle curtain.

  • The chain shall be continuous from the berm through each floating baffle curtain section.  In the event of multiple sections, the chains shall be joined to each other by the use of a stainless steel rapid link.  The chain shall be 3/8”, hot dipped galvanized, proof coil.

C         Concrete anchors shall be placed along the side of the anchoring chain at approximately 18’ intervals.  The concrete anchors shall be attached to the ballast chain using stainless steel rapid links.  Cut outs in the chain pocket of the floating baffle curtain shall make the chain accessible by forming an opening for the attachment of the concrete anchor.

D.        Stainless steel bolts, 3/8” diameter, with nuts and washers shall be provided to act as chain stops at the end of each section of the floating baffle curtain.

  • The ballast chain is not to be used as a tension member.
  • Shore anchorage shall consist of a 6’ long three inch diameter steel post embedded in concrete.  The steel post shall be Stainless Steel.
  • Depending upon soil conditions, additional anchorage may be required.
    • Retrieval Rope 

The retrieval rope shall be 3/8” diameter, marine grade, polypropylene rope.  The rope shall be attached to each of the bottom anchor attachment points and secured to a stainless steel grommet located in the flotation collar directly above each cutout in the chain pocket.

    • Baffle Connections

When necessary to fabricate the floating baffle curtain in multiple sections, the floating baffle curtain sections shall be joined by using connectors.  The connectors consist of 1/4” thick by 1-1/2” wide by 10” long flat bar battens and 3/8” diameter by 1 ½” long stainless steel bolts, nuts, & washers.

The battens shall be applied on the outside of each floating baffle curtain section connection hem and “sandwich” the two floating baffle curtain sections between them.  Then the battens shall be secured with four 3/8” diameter by 1 ½” long bolts thru pre-drilled holes in the battens.  The ballast chain at the bottom of each connection point shall be joined together using a stainless steel rapid link.

    • End Connections

The end connection consist of  1/4” thick by 2” wide by 12” long stainless steel flat bar endplates, 3/8” diameter by 1 ½” long stainless steel bolts, nuts, & washers, 3/8” stainless steel forged eyebolt, and a ½” stainless steel shackle.

The endplates shall be applied on the outside of terminating end of the floating baffle curtain and “sandwich” the end hem between them.  Then the endplates shall be secured with three 3/8” diameter by 1 ½” long bolts and one 3/8” diameter stainless steel forged eyebolt thru pre-drilled holes in the end plate battens.  The ballast chain shall be connected to the bottom of the endplate to the eyebolt using a stainless steel rapid link.  The ½” stainless steel shackle shall be attached to the end plate thru a predrilled hole, then the shackle shall be secured to the anchor point embedded in the top of the berm using a piece of stainless steel cable or galvanized chain.

2.06     Miscellaneous Hardware

All of the hardware used in the manufacture of the floating baffle curtain shall be stainless steel, with the exception of the ballast chain, which in most cases shall be hot dipped galvanized unless specified stainless steel.

2.07     Flow Thru Windows

Flow thru windows, if required, shall be constructed to provide one square foot of opening per 43,000 gallons per day flow.  Size and placement of the flow thru windows shall be dependent upon the desired flow pattern and the size of the baffle curtain.  The project engineer shall determine the window size and the placement.

Each flow thru window shall be reinforced with additional layers of the parent material around the perimeter of the cutout.  The reinforcing material shall be thermally sealed onto both sides of the curtain around the cutout.

Baffle Curtain Material

The floating baffle curtain material shall be a reinforced synthetic material.  The material supplied under these specifications shall be a first quality product designed and manufactured specifically for this application and demonstrated to be suitable and durable for this purpose.  The baffle curtain shall be thermally sealed using dielectric, hot wedge, or hot air sealing methods.  Sewing of the panel seams, flotation pockets, and ballast pocket shall not be permitted.

The baffle curtain shall be manufactured using 6730 XR-5 as manufactured by the Seaman Corporation of Bristol. TN.  The 6730 XR-5 is a woven polyester based membrane with a standard XR-5 coating.

Typical Uses:          6730 XR-5 is a more flexible version of the 30 oz. XR-5 and is recommended for baffle applications.

Seaming:                Factory and field seams should be made using RF, hot wedge, or hot air methods.  No glues, solvents, or sewing are recommended.

Colors:                    6730 XR-5 is produced in black/black or black/white.

Base Type
Fabric Weight
7.5 oz/sq. yd.
Finished Coated Weight
30.0 -/+ 2.0 oz/sq/yd
Tongue Tear ASTM D-751
(8” X 8” sample size)
70/50 lbs.min.
Grab Tensile ASTM D-751
Grab Method
550/525 lbs./in.
Strip Tensile ASTM D-751
Cut Strip Method
425/400 lbs. min.
Adhesion (min.) ASTM D-751
Adhesion Para. B.
Dielectric seam
10 lbs./in. min.
Hydrostatic Resistance
ASTM D-751
Method A Procedure 1
500 psi min.
Cold Crack ASTM D-2136
½” Mandrel 4 hrs.
Pass -30º F



The floating baffle curtain shall be warranted against defects in workmanship by the manufacturer for a period of no longer than one year.

Additional warranties may be available upon request.  Consult factory.

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