STOP LOGS

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WATER CONTROL SOLUTIONS. MADE IN THE USA

Stop logs are used for incremental level control of water flow in an open channel. Logs are in 12″ by any required length with lip seal across the long bottom to create a seal between logs. The logs are inserted in a channel frame with vertical lip seals to seal between the logs and frame. Coldwell-Wilcox Technologies stop logs are fabricated in aluminum, stainless steel or a combination of aluminum logs and stainless steel frame. Stop log frames can either be embedded which is the case for most or surface mount. Each length log is provided with a lanyard type lifter for removing or installing logs in the frame one at a time and thus controlling the water level as needed. An overhead crane or mobile crane is needed to install or remove the logs.

Stainless Steel Stop Logs Specifications

Stop logs where shown in the plans and specifications and listed in the stop log schedule shall be as manufactured by Coldwell-Wilcox Technologies of Cincinnati, Ohio. The stop logs shall be stainless steel embedded or surface mounted type as called out by the specifications and site drawings.

Equipment provided shall be fabricated, assembled and placed in proper operating condition per the drawings, specifications, engineering data, instructions and recommendations of the log manufacturer unless otherwise noted by the engineer. The stop log assemblies shall be supplied with all parts and accessories as specified within the site specifications and drawings and as required for a complete installation.

All materials will comply with applicable provisions and recommendations of the following, except as otherwise shown or specified:

Frame, logs ASTM A276 Type 304(L) or 316(L) Stainless Steel
Fasteners ASTM A276 Type 304 or 316 Stainless Steel
Seals Neoprene ASTM D2000 50-60 Durometer
Lifter A36 steel, 304(L) or 316(L) Stainless Steel

Stop logs shall be designed and shop tested. Design and operating heads shall be per the site schedule and/or specifications.

Guides shall be of fabricated and/or extruded type 304(L) or 316(L) stainless steel. Guides are designed for embedding in or surface mounting to concrete. Surface mounted guides shall be mounted using a type 304 or 316 stainless steel anchor system. The guide channel is vertically lined front and rear with 50/60 durometer neoprene seals to maximize leakage control both seating and unseating. Guides shall be provided per plans, specifications and/or schedule. Guides shall be designed and constructed to withstand the total thrust caused by water pressure seating and unseating.

Stem guides shall be UHMW bushing block stainless steel angle frame mounted on self-contained gates and bronze bushed ASTM A126, class B cast iron for conventional gates and shall be spaced as required by manufacturer.

Contractor shall make adjustments required to place system in proper operating condition. Contractor shall conduct functional field test of each stop log assembly in the presence of the Owner’s Project Representative to demonstrate that each part and all components together function correctly.

Stop logs shall be the latest standard product in regular production by a manufacturer whose products have proven reliable in similar service. A single manufacturer shall supply the stop logs.

Manufacturer’s data and drawings shall be submitted for approval in accordance with site specifications and engineering drawings. Manufacturer’s submittal shall include but not limited to stop log material specification sheet, stop log data summary sheet, site plan drawings and paint/coating data sheets.

CWT standard Logs shall be constructed of type 304(L) or 316(L) stainless steel structural shapes and or plate reinforced to withstand maximum seating and unseating heads. Fabricated logs may be provided in six (6) inch, twelve (12) inch, eighteen (18) inch or any height combinations required per the specification, plans and/or schedule. Log deflection shall not exceed 1/360 of the span under the design head. Each log is designed with a dual J-seal and holder configuration for maximum sealing at the flushbottom and between each log. Stop logs are guide inserted and removed by means of a lanyard type lifter that is overhead crane operated. A latching device is provided on the lifter to engage and disengage the stop log pins. One lifter shall be provided for each width log.

Steel components if any such as the lanyard lifter shall receive manufacturer’s standard TNEMEC series N140-1255 pota-pox beige and TNEMEC series 69 pond 28BL finish prior to shipment. Total system shall be 12-16 mils DFT.

Installation shall be in complete accordance with manufacturer’s instructions and recommendations. Anchor bolts will be set in accordance with approved manufacturer’s drawings.

Aluminum Stop Logs Specifications

Stop logs where shown in the plans and specifications and listed in the stop log schedule shall be as manufactured by Coldwell-Wilcox Technologies of Cincinnati, Ohio. The stop logs shall be aluminum embedded or surface mounted type as called out by the specifications and site drawings.Equipment provided shall be fabricated, assembled and placed in proper operating condition per the drawings, specifications, engineering data, instructions and recommendations of the log manufacturer unless otherwise noted by the engineer. The stop log assemblies shall be supplied with all parts and accessories as specified within the site specifications and drawings and as required for a complete installation.

All materials will comply with applicable provisions and recommendations of the following, except as otherwise shown or specified:

Frame, logs ASTM B209, B308, Alloy 6061, 5052
Fasteners ASTM A276 Type 304 or 316 Stainless Steel
Seals Neoprene ASTM D2000 50-60 Durometer
Lifter A36 steel, 6061/5052 Aluminum, 304(L) or 316(L) Stainless Steel

Stop logs shall be designed and shop tested. Design and operating heads shall be per the site schedule and/or specifications.

Guides shall be of fabricated and/or extruded Aluminum Type 6061/5052, type 304(L) or 316(L) stainless steel. Guides are designed for embedding in or surface mounting to concrete. Surface mounted guides shall be mounted using a type 304 or 316 stainless steel anchor system. The guide channel is vertically lined front and rear with 50/60 durometer neoprene seals to maximize leakage control both seating and unseating. Guides shall be provided per plans, specifications and/or schedule. Guides shall be designed and constructed to withstand the total thrust caused by water pressure seating and unseating.

Each stop log shall be fully assembled and shop-inspected for proper seating. Each log shall be inserted in its guide system to ensure proper fit and seal.

Contractor shall make adjustments required to place system in proper operating condition. Contractor shall conduct functional field test of each stop log assembly in the presence of the Owner’s Project Representative to demonstrate that each part and all components together function correctly.

Stop logs shall be the latest standard product in regular production by a manufacturer whose products have proven reliable in similar service. A single manufacturer shall supply the stop logs.

Manufacturer’s data and drawings shall be submitted for approval in accordance with site specifications and engineering drawings. Manufacturer’s submittal shall include but not limited to stop log material specification sheet, stop log data summary sheet, site plan drawings and paint/coating data sheets.

CWT standard Logs shall be constructed of type 6061/5052 aluminum structural shapes and or plate reinforced to withstand maximum seating and unseating heads. Fabricated logs may be provided in six (6) inch, twelve (12) inch, eighteen (18) inch or any height combinations required per the specification, plans and/or schedule. Log deflection shall not exceed 1/360 of the span under the design head. Each log is designed with a dual J-seal and holder configuration for maximum sealing at the flushbottom and between each log. Stop logs are guide inserted and removed by means of a lanyard type lifter that is overhead crane operated. A latching device is provided on the lifter to engage and disengage the stop log pins. One lifter shall be provided for each width log assembly.

Steel components if any such as the lanyard lifter shall receive manufacturer’s standard TNEMEC series N140-1255 pota-pox beige and TNEMEC series 69 pond 28BL finish prior to shipment. Total system shall be 12-16 mils DFT.

Installation shall be in complete accordance with manufacturer’s instructions and recommendations. Anchor bolts will be set in accordance with approved manufacturer’s drawings.