Fiberglass stop logs

Corrosion-Resistant Fiberglass Reinforced Polyester Stop Logs

Our Heavy Duty Fiberglass Stop Logs have been used successfully by engineers in a wide range of applications for over 18 years. Stop logs are in service throughout the United States and overseas in wastewater treatment plants, water treatment plants, fish hatcheries, sludge drying beds, and composting facilities and for lagoon control, flood control, and diversion. Plasti-Fab Heavy Duty Stop Logs feature a unique seamless construction that fully surrounds an internal structural skeleton. Wooden stop logs were used before our grand-fathers were born, why not today? Wood swells as it takes on moisture, and the ends are easily damaged after which decay may start. Most of all, wooden stop logs are generally made from old growth redwood or cyprus which is a diminishing resource. Seals may be affixed to copolymer logs thus affecting a good seal which is difficult at best on wooden stop logs.

Guide Frames

Plasti-Fab heavy duty stainless steel guide frames are designed for embedment in concrete, for surface mounting or mounting on channel walls. Most frequently on new construction, guide frames are embedded in channel walls and floor. Surface mounted guide frames are often used on channel end walls. In these cases guides have slotted mounting brackets that slide onto preset anchor bolts making installation simple. A grout base is used to prevent leakage between the guide and channel wall. Installation in an existing channel requires an in-channel guide. This will reduce the channel width slightly. The engineer may wish to chip out an embedment in the channel floor so the bottom guide can be flush mounted. A one inch grout base is recommended to prevent seepage between the wall and guide.

Elastomeric Seals

Guide frames have a unique neoprene UHMW seal with a double edged design that gives a point load seal against the face of the stop log. Stop logs usually have elastomeric seals the length of the logs. We use our specially designed “alligator” seal which is attached to the top of each log. The bottom log also has a seal on the bottom. Seals may be made of various elastomers, the most common being 60 durometer neoprene. The Plasti-Fab seal design provides very tight shut off for seating or unseating heads. The leakage rate generally is less than 0.2 GPM/ft. of wetted perimeter.

Design Details

The FRP stop log is constructed of a copolymer composite totally encapsulating an internal reinforcing structure. Typical log thickness is 2 1/2’’ to 6 1/2’’. The structure has no seams or joints thus assuring fluid tight integrity. It is highly corrosion resistant, weather resistant, and requires little or no maintenance. The exterior surface is smooth and flat. Flush Bottom – It is generally desired to have a flush bottom in most channels.

Lifting Equipment

Plasti-Fab fiberglass Stop Logs come standard with 1 1/2″ round stainless steel lifting pins that work in conjunction with our galvanized steel lifting beam. The lifting beam is built to automatically latch on to the stop log when lowered into the guide frame. The beam is released from the log by a simple tug on a rope tag line. Request a Quote for Corrosion Resistant Fiberglass Stop Logs

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