NDBC Response Attachment 2_ATHULL2.0-F2003.pdf

PDF 3 MB Posted May 21, 2026

Attached to: NOAA: 2. 54m Buoy Frame & Bridles for the National Data Buoy Center (NDBC)
Solicitation number: 142082-26-0206
Issued by: Department of Commerce National Oceanic and Atmospheric Administration

About this file

Written by GovTribe AI · May 21, 2026

This document is an engineering drawing for a 2.54 M Upper Clamping Weldment assembly, prepared by the National Data Buoy Center (NDBC) at John C. Stennis Space Center in Mississippi. The drawing (DWG NO: ATHULL2.0-F2003, Revision 0) provides detailed specifications across five sheets for fabrication and assembly of a structural component used in buoy hull construction.

The assembly comprises 15 primary parts constructed primarily from aluminum alloys (5086 and 6061), including various plates, tubes, pipes, and couplings. Key components include three 0.75-inch thick plates measuring 48.00" x 144.00" (Aluminum 5086), twelve 0.375-inch thick plates of the same dimensions, two 0.25-inch thick plates measuring 48.00" x 120.00", one 4-inch Schedule 40 aluminum pipe, rectangular tubing, a 0.75-inch Schedule 40 pipe (12.5 inches long), a 0.50 NPT pipe coupling, and a 2.50-inch diameter round aluminum bar. The drawing includes comprehensive dimensional specifications, tolerance requirements (decimals ±0.05 for two-place and ±0.010 for three-place), and angular tolerances of ±0.5 degrees. Manufacturing requirements mandate compliance with AWS D1.1/D1.2 welding standards, with all welds ground flush, and all sharp edges broken and deburred. Multiple orthogonal views, sections, details, and hole tables provide precise geometric and positional information necessary for accurate fabrication of this buoy clamping mechanism.

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0° SIDE VIEW

SCALE 1 : 10

RIGHT SIDE VIEW

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ISOMETRIC VIEW

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TOP VIEW

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SECTION A-A

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15 NEED PART NUMBER

ASSIGNED

BAR, METAL, ROUND, 2.50", ALUMINUM, 5086 NEED

VENDOR

ASSIGNED

5.250 in

14 TUBE, METAL, RECTANGLE, 2.00" x 3.00" x .25" THK, ALUMINUM, 5086 2

13 TUBE, METAL, RECTANGLE, 3.00" x 4.00" x .25" THK, ALUMINUM, 5086 1

12 PIPE, 4.00", SCH 40, ALUMINUM, 5086 1

11 5574

PIPE, .750", SCH 40, ALUMINUM, 6061

12.500 in

10 6607PLATE, METAL, .50" x 48.00" x 144.00", ALUMINUM, 6061, T6 136.080 in^2

9 6613COUPLING, PIPE, .50 NPT, SCH 40, ALUMINUM 1.312 in

8 6616PLATE, METAL, .25" x 48.00" x 120.00", ALUMINUM 5086 [1/4", 4', 10'] 2

7 6616PLATE, METAL, .25" x 48.00" x 120.00", ALUMINUM 5086 [1/4", 4', 10'] 1

6 8409PLATE, METAL, .375" x 48.00" x 144.00", ALUMINUM, 5086

NDBC1

5 8409PLATE, METAL, .375" x 48.00" x 144.00", ALUMINUM, 5086 NDBC1

4 8409PLATE, METAL, .375" x 48.00" x 144.00", ALUMINUM, 5086 [3/8", 4', 12'] 1

3 8409PLATE, METAL, .375" x 48.00" x 144.00", ALUMINUM, 5086 12

2 8409PLATE, METAL, .375" x 48.00" x 144.00", ALUMINUM, 5086 1

1 8411PLATE, METAL, .75" x 48.00" x 144.00", ALUMINUM 5086

PARTS LIST

ITEMZONEPART/SPEC. NO.NDBC CONT. NO.DESCRIPTIONNOTESVENDORQTY.

A A

B B

C C

D D

D R A W

I N

S T A T E

SHEET 1 OF 5

APPROVED

CHRIS BROWN

DWG NO

ATHULL2.0-F2003

TITLE

2.54 M UPPER CLAMPING WELDMENT

SIZE

REV

NATIONAL DATA BUOY CENTER

John C. Stennis Space Center

Stennis Space Center, Mississippi 39529

UNLESS OTHERWISE SPECIFIED:

DIMENSIONS ARE IN INCHES

TOLERANCES

DECIMALS ANGULAR

.XX +/- .05 +/- .5

.XXX +/-.010 .

DO NOT SCALE DRAWING

APPLICATION

-NO. HULL NO. NEXT ASSY. USED ON

NDBC PROJ. ENGINEER

NTSC ENGINEER

CHECKED

DRAWN

APPROVALS DATE

CONTRACT NO.

CHAIR, ENGINEERING REVIEW BOARD

CHANGE ORDER #

SCALE

DRAWING LEVEL

* = VENDOR REQUIRED OTHERWISE VENDOR SUGGESTED.

NOTES:

BREAK ALL SHARP EDGES AND DEBURR EXPOSED WORK.

ALL WELDS MUST COMPLY WITH AWS D1.1/ D1.2.

GRIND DOWN WELD FLUSH.

.25

TYP

.19 1.44

.19

TYP

12x

180° REF

0° REF

6.25

34°

94°

154°

146°

86°

26°

90°

BOTTOM VIEW

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180° SIDE VIEW

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290° SIDE VIEW

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SIDE VIEW

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FRONT VIEW

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ISOMETRIC VIEW

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ISOMETRIC VIEW

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DETAIL B

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DETAIL A

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A A

B B

C C

D D

D R A W

I N

S T A T E

SHEET 2 OF 5

DWG NO

ATHULL2.0-F2003

SIZE

REV

COUPLING

TYP

2 5

.25

1.31

.25

2 5

.25

1.63

TOP VIEW

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SECTION B-B

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DETAIL C

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DETAIL D

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TOP VIEW

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SIDE VIEW

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SIDE VIEW #1

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SIDE VIEW #2

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B B

A A

B B

C C

D D

D R A W

I N

S T A T E

SHEET 3 OF 5

DWG NO

ATHULL2.0-F2003

SIZE

REV

3 5

.25 3-6

.25

.38 1.88

30.91

31.35

33.41

33.85

40.76

48.38 n34.38

120°

45°

180° REF

0° REF

.11

.89

.64

24.06

41.55

44.33

53.92

56.70

58.30

63.31

.50

25.28

25.78

26.28

31.01

.50

25.28

25.78

26.28

31.01

R39.25

.375

HULL INSERT TOP

2.14

3.00

4.13

4.86

4.88

5.00

9.50

14.52

17.23

17.44

18.88

23.63

28.13

32.63

1.50

4.00

6.73

9.43

10.14

40.24

41.00

43.00

44.09

45.00

47.00

47.38

49.00

49.50

R2.00

R1.88

R2.00

HOLE TABLE

HOLE XDIM YDIM DESCRIPTION

A1 -6.38 1.50 n1.00 x .75

A2 -23.63 49.00 n1.00 x .75

B1 -28.13 49.50 n5.00 x .75

18x n.18 THRU w n.33 X 82°

9x n.40 x THRU

3x n2.06 THRU v n2.53

EQUALLY SPACED

ON n 34.38 n2.00 THRU

.75

R1.50

R.50

R.503x

HULL INSERT STRUT

TOP VIEW

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SECTION C-C

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ISOMETRIC VIEW

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60° SIDE VIEW

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285° SIDE VIEW

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300° SIDE VIEW

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180° SIDE VIEW

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TOP VIEW

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SIDE VIEW

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TOP VIEW

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SIDE VIEW

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TOP VIEW

SCALE 1 : 1

SIDE VIEW

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SIDE VIEW

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TOP VIEW

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SIDE VIEW #1

SCALE 1 : 2

TOP VIEW

SCALE 1 : 4

SIDE VIEW

SCALE 1 : 4

SIDE VIEW #1

SCALE 1 : 2

SIDE VIEW #1

SCALE 1 : 1

SIDE VIEW #2

SCALE 1 : 2

SIDE VIEW #2

SCALE 1 : 2

SIDE VIEW #2

SCALE 1 : 1

C C

A A

B B

C C

D D

D R A W

I N

S T A T E

SHEET 4 OF 5

DWG NO

ATHULL2.0-F2003

SIZE

REV

2.54 M CAN

CABLE PASS THROUGH TUBING

VENT TUBE

0° REF

180° REF

120° 120°

60°

15°

60°

R.13

44.38

48.00

15.38

30.75 n1.19 x THRU

45.88

15.38

30.75 n1.19 x THRU

15.38

30.75

44.38 n1.19 x THRU

44.88 n2.00 x THRU

15.38

30.75

R15.38

6.00

17.87

18.00 n3.50 x .25

3.00

4.00 n.41 x THRU

EQUALLY SPACED

ON n6.60 n8.10 n4.50 x THRU

.38

CABLE PASS THROUGH FLANGE

3.00

CABLE TRANSITION PIPE

6.25

2.50

3.50

CABLE PASS THROUGH END CAP

3.00

18.43

18.50

R15.38 n1.13 x .25

2.00

3.00

HIGH AND LOW VENT TUBING

2.50

1.50

HIGH AND LOW VENT TUBING END CAP

.25

1.20

1.95

R.75

.38

.75

1.75

2.88 n.95 x THRU

CAN LATCH

SIDE VIEW

SCALE 1 : 1

TOP VIEW

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TOP VIEW

SCALE 1 : 5

SIDE VIEW

SCALE 1 : 5

SIDE VIEW #1

SCALE 1 : 5

SIDE VIEW #2

SCALE 1 : 5

SIDE VIEW #1

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SIDE VIEW #2

SCALE 1 : 5

A A

B B

C C

D D

D R A W

I N

S T A T E

SHEET 5 OF 5

DWG NO

ATHULL2.0-F2003

SIZE

REV

n1.00 x THRU n2.06 x 1.38

1.75

.13 X 45° Chamfer

TIE ROD CUP

2 5 n30.00

.38

CYLINDER BOTTOM

2 5

29.03

29.47

38.88

R.50

1.75

.50

R.50

270° INTERNAL MOUNTING BRACKET

31.53

31.97

38.88

R.50

R.14

1.00

1.75

R.50

.50

90° INTERNAL MOUNTING BRACKET

R.14

3 5

File details come from the government source that posted it. Updated May 21, 2026.