ALUMINUM STOP LOG SPECIFICATION
I.
General
This specification relates to the design, materials of construction, fabrication, and the supply of the
stop log as shown on the plans and indicated in the equipment schedule. The stop log shall be
manufactured by Rodney Hunt-Fontaine, Orange, MA. Manufacturers shall have a minimum of five
(5) years experience in the design and manufacture of equipment of this type.
II.
Stop Log Schedule
A.
Quantity
B.
Channel width x channel depth
C.
Depth of water
D.
Seal one or both directions
III. Materials
A.
Log
Aluminum B308 6061-T6
B.
Lifting Lugs
Aluminum B308 6061-T6
C.
Frame
A276-304/316 Stainless Steel
D.
Seals
1)
Sides: Lip Seal - D2000
Grade 2BC 615
Extruded Neoprene
Durometer 50 ± 5
2)
Flush Bottom Lip Seal ASTM D2000 Grade 2BC 515
Extruded Neoprene
Durometer 50 ± 5
IV.
Design
A.
Log
The log shall be of one piece extruded aluminum, and shall be extruded with the following
characteristics:
1.
Log shall be 6”, 12" or 18” high.
2.
Minimum tensile strengths shall equal 38,000 psi ultimate and 35,000 psi yield.
3.
The bending stress shall not exceed 9500 PSI at the mid-section of the log.
4.
The bottom of the log shall be extruded in a way to accept a specially extruded
resilient seal to provide a flush bottom closure. The shape of the lip seal shall
provide a seating surface having a minimum width of 1". The vertical face of the
seal shall be in contact with the seating surface of the guide or seal located on
the frame to provide a proper seal at the corners. End caps will not be allowed
on the stop logs. Logs to be of sufficient weight to be submerged under their own
weight.
B.
Guide Slots
Fabricated stainless steel guide slots shall be provided. These shall be to the proper
dimensions including any mounting holes to ensure proper field adjustment. These
guides shall extend the height as shown on the contract plans so to contain all logs.
The bottom sill shall consist of a stainless steel formed channel either welded or bolted to
the vertical side pieces.
C.
Seals
Lip type seals shall be attached to the frame to restrict leakage. Under the condition
which the log will be subjected to flow in both directions, the log and guide shall be
provided with seals in both directions.
D.
Hardware
All necessary attaching bolts and anchor bolts shall be stainless steel and furnished by
the stop log manufacturer.
V.
Lifting Device
One (1) lifting device shall be provided for each stop log width. The lifting device shall be
equipped with a suitable eye bolt for crane operation. The device shall be guided by the slot of
the guide extrusion, and shall be capable of securing and releasing the stop logs with the use of a
lanyard from the operating floor.
VI.
Drawings for Approval
Drawings showing dimensions and essential details required to locate and install the stop logs
shall be submitted for the engineer's approval.
VII.
Installation
The installation of all parts shall be done in a workmanlike manner and in accordance with
detailed technical installation procedures supplied by the manufacturer. It shall be the
contractor's responsibility to handle, store, and install the stop logs in strict accordance with
manufacturer's drawings and recommendations.