Attachment 4 - Fort Randall Draft Tube Bulkhead Seal Supply Drawings.pdf
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- W9128F26QA049
About this file
This is a set of technical drawings for draft tube bulkhead seal replacement at Fort Randall Dam and Reservoir on the Missouri River, prepared by the U.S. Army Corps of Engineers, Omaha District, through the Hydroelectric Design Center.
The drawings specify the design and manufacturing requirements for rubber seals and related components for the powerhouse draft tube bulkheads. The project involves replacement of top, bottom, and side seals for eight existing draft tubes, with detailed specifications for rubber seal assemblies, retainer bars, and spring shoes. Key technical requirements include factory-vulcanized Teflon film coating in specified regions, precise tolerance standards (fractional dimensions ±1/32" to ±1/8" depending on milling specifications), and field-measured dimensions for side seal bar lengths and bolt spacings. The contractor must deliver seals undrilled to the site and submit field measurement reports documenting each bulkhead's specifications. All parts must be inspected by quality assurance upon arrival. The drawings reference existing bulkhead structure drawings (MR91-82E1.1 and M-702) and provide detailed assembly views, section details, and dimensional specifications for manufacturing the replacement components.
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Text version
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CONTRACTOR TO FIELD MEASURE SIDE SEAL BAR LENGTH
CONTRACTOR TO FIELD MEASURE SIDE SEAL BAR BOLT SPACINGS
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3" 6" 1' 0"0
3" 6" 1' 0"0 3" 6" 1' 0"0
6" 1' 0" 2' 0"0
1/4" CHAMFER
TOP
BOLT HOLE. SEE NOTE 4
WITH 11/16"ØCOUNTERSUNK
ROUND EDGE BAR 3 1/2" X 1/2"
STRUCTURE
EXISTING BULKHEAD
SEE NOTE 4
WITH 11/16"Ø BOLT HOLE
ROUND EDGE BAR 4" X 1/2"
1/4" CHAMFER
STRUCTURE
EXISTING BULKHEAD
STRUCTURE
EXISTING BULKHEAD
R 1/4"
SEE NOTE 3
COAT WITH TEFLON
SEAL WITH TEFLON
DO NOT COAT BOTTOM
SEE NOTE 3
COAT WITH TEFLON
PROVIDE RUBBER SEAL SHIM
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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F9
SCALE: 3" = 1'-0"
RUBBER SEAL (SIDE SEAL ASSEMBLY)
GENERAL NOTES
WITH FINDINGS PER SECTION 05 56 09.00 26.
BOLT SPACING FOR ALL 8 EXISTING DRAFT TUBE BULKHEADS. SUBMIT REPORT
CONTRACTOR TO FIELD MEASURE EACH SIDE SEAL RETAINING BAR LENGTH AND 11.
TO SITE UNDRILLED.
SEALS ARE SHOWN IN ASSEMBLY WITH BOLT HOLES. DELIVER SEALS 10.
ITEMS IN BOLD ARE NEW.9.
± 0.00005X.XXXX
± 0.0005X.XXX
± 0.005X.XX
± 0.02X.X
± 0.1X
TOLERANCEDIMENSION
TOLERANCES FOR DECIMAL DIMENSIONS ARE AS FOLLOWS:8.3
TOERLANCES FOR ANGLES: ± 0.5°8.2
8.1.3 NON-MILLED ENDS AND MEMBER LENGTH OVER 30': ± 1/8"
8.1.2 NON-MILLED ENDS AND MEMBER LENGTH OF 30' OR LESS: ± 1/16"
8.1.1 BOTH ENDS MILLED: ± 1/32"
8.1 TOLERANCES FOR FRACTIONAL DIMENSION:
TOLERANCES UNLESS OTHERWISE NOTED.8.0
SPECIFICATIONS FOR REQUIRED NUMBER OF BULKHEADS.
ALL QUANTITIES INDICATED ON STRUCTURAL SHEETS ARE FOR 1 BULKHEAD. SEE 7.
ALL BOLT HOLES ARE TO BE STANDARD SIZE, UNLESS NOTED OTHERWISE.6.
OTHERWISE.
OR MACHINING. BREAK ALL DRAIN HOLE EDGES TO A 1/8" RADII UNLESS NOTED
EDGE IS DEFINED AS ANY EDGE THAT IS THE RESULT OF SHEARING, FLAME CUTTING
BREAK ALL SHARP EDGES TO A 1/16" RADII UNLESS NOTED OTHERWISE. A SHARP 5.
COUNTERSUNK AND THE SIDE AND BOTTOM SEALS ARE STANDARD HEX HEAD BOLTS.
QUANTITIES AS REQUIRED BY THE SPECIFICATIONS. NOTE THE TOP SEAL BOLTS ARE
SEAL BOLTS ARE NOT SHOWN IN DETAIL VIEWS FOR CLARITY. PROVIDE SEAL BOLT 4.
THE BOTTOM SEAL DOES NOT HAVE TEFLON COATING.
SHOWN. NOTE THE TOP AND SIDE SEALS HAVE DIFFERENT COATING REGIONS, AND
PROVIDE FACTORY VULCANIZED TEFLON FILM IN THE REGION OF THE SEALS AS 3.
ALL PARTS ARRIVING ON SITE MUST BE INSPECTED BY GQAR.2.
WORK THIS DRAWING WITH REFERENCE DRAWING MR91-82E1.1 AND M-702.1.
K1
SCALE: 3" = 1'-0"
RUBBER SEAL (TOP SEAL ASSEMBLY)
F1
SCALE: 3" = 1'-0"
RUBBER SEAL (BOTTOM SEAL ASSEMBLY)
A3
SCALE: 1 1/2" = 1'-0"
NEW SIDE SEAL RETAINER BAR
A1
SCALE: 1 1/2" = 1'-0"
SECTION
A1
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