DETAILED SPECIFICATIONS FOR FLOATING BAFFLE CURTAIN

Link to Our Product Page

ARTICLE 1 GENERAL

A. SCOPE

The 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 which are also in a sealed pocket. Baffle Sections shall be constructed to lengths dependent upon the desired depth of the wall. 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 of connecting the sections together to make the desired length. Baffles shall be floated into position in the event the impoundment is full of fluid, or assembled on the bottom of the impoundment if it is dry.

B. MANUFACTURER

ENGINEERED TEXTILE PRODUCTS, INC.
P.O.BOX 7474
715 LOEFFLER STREET
MOBILE, ALABAMA 36670
TELEPHONE: 1-
(251)476-8001
24 HR. FAX: (251) 476-0956

The manufacturer of the baffle curtain shall have at least ten (10) years experience in the design and construction of high quality flexible thermoplastic products, utilizing dielectic and/or heat sealing fabrication.

The manufacturer shall have manufactured a minimum of not less than ten thousand (10,000) linear feet of baffle curtains for tanks, ponds, and open water applications.

C. Shop drawings and product data shall be submitted by the baffle manufacturer for approval prior to manufacture, complete with specifications covering material also to be used.

Baffle curtains shall be packaged on to a sturdy wooden pallet designed to be moved by a forklift or similar equipment. Each baffle curtain section shall be fully enclosed in heavy cardboard wrap, water resistance film and protected to prevent damage to the baffle curtain during shipment and shall be prominently and indelibly marked with baffle size unless otherwise recommended by the manufacturer.

ARTICLE 2 - DETAILS OF BAFFLE CONSTRUCTION

A. The floatation shall consist of closed cell polyfoam logs, having the buoyancy of 60 lbs. per cubic foot. The size of the polyfoam log depends upon the required buoyancy and freeboard desired. (consult factory)

The floatation shall be completely enclosed inside the baffle by the means of a dielectric seal. Each floatation log shall be sealed in it's own 10' long chamber along the floating collar.

B. ANCHORING

The baffle shall be anchored in position be a galvanized chain sealed in a dielectrically sealed hem at the bottom of the curtain.

The chain shall be continuous from the berm through each baffle section and in the event of multiple sections, the chain shall be joined to each other by the use of a zinc plated quicklink. The chain shall be, in most applications, 1/4" hot dipped galvanized chain.

Concrete anchors shall be placed along the side of the anchoring chain at 20'-30' intervals. The concrete anchor shall be attached to the anchoring chain using zinc plated quicklink. Access to the chain shall be made by cutouts in the sealed pockets forming an opening exposing the anchoring chain for the attachment of the concrete anchors.

Stainless steel 1/4" diameter bolts with washers and locknuts shall be provided to act as chain stops at the end of each baffle section and each anchor connection cutout.

This "bottom anchoring" method shall allow the top of the baffle to rise and fall with varying water levels and to lean back against high winds and ice, thus minimizing resistance.

Shore anchorage shall consist of 4" screw anchors or 1 1/2" diameter galvanized pipe, depending on soil conditions.

RETRIEVAL ROPE

Retrieval lines shall be 3/8" polypropylene rope attached to each concrete anchor attachment point and secured to a grommet located in the floatation collar directly above each cutout in the chain pocket.

C. BAFFLE CONNECTIONS

When necessary to fabricate in multiple sections the baffles shall be joined by bolt through connectors consisting of 1/4" x 2" stainless steel bolts and 1/4" x 2" x 18" stainless steel battens. These battens shall be applied on the outside of each baffle curtain and sandwich the two baffle sections between them, then bolted together on 4" centers using 1/4" stainless steel bolts. The anchoring chains at the bottom of each baffle section are joined using a zinc plated quicklink connecting the chain from each baffle curtain section together.

In the event a cable is used in the top of the baffle, a similar connection will be made for the connection of the cable to cable.

D. END CONNECTIONS

The end plate connection shall consist of 1/4" x 2" x 12" stainless steel bolts to "sandwich" the baffle curtain between the plates. A stainless steel forged eyebolt shall be attached to the bottom of the end plate for attachment of the anchoring chain by means of a quicklink. A 1/2" shackle shall be attached to each end plate assembly to be attached to an anchor point embedded into the top of the berm.

E. MISCELLANEOUS HARDWARE

All hardware provided is hot dipped galvanized and stainless steel. (Other grades of metal materials are available upon request)

F. 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 shall be dependent on the flow pattern desired and size of baffle. Each window shall be reinforced at the perimeter of the cutout on both sides with additional layers of the parent material heat sealed to the baffle curtain. Window size and placement shall be determined by the project engineer.

G. BAFFLE CURTAIN MATERIAL

The baffle skin material shall be of reinforced synthetic material. The material supplied under these specifications should be first quality products designed and manufactured specifically for this application and demonstrated to be suitable and durable for this purpose.

ARTICLE 3 EXECUTION

The baffle units shall be installed in position as shown on the engineers' plans. Equipment shall be installed in accordance with manufacturer's drawings, instructions, and recommendations.

The contractor shall provide the services of a certified factory trained and approved installer who has installed a minimum of twenty (20) baffle projects.

The installer shall be approved by ETP, Inc.

ARTICLE 4 WARRANTY

The baffle manufacturer shall warrant for workmanship of the baffle curtain for a period no longer than one year.