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Collapse of U.S. 35 Highway Bridge, Point Pleasant, West Virginia, December 15, 1967 (HAR-71/01)

National Transportation Safety Board · 1970-12-16 · 202 pages · text by OCR

This is the final highway accident report (NTSB-HAR-71-1) from the National Transportation Safety Board, adopted in December 1970. It covers the collapse of the U.S. 35 bridge between Point Pleasant, West Virginia, and Kanauga, Ohio, on December 15, 1967, which killed 46 people. The Board found that the cause was a cleavage fracture in eyebar 330 at joint C13N. That fracture grew from a flaw produced over 40 years by stress corrosion and corrosion fatigue, in a spot that could not be seen or found by inspection.

Open the PDF at page 195 Original source ↗

“Masters”10 pages

  • p. 5 …Framework for Conduct of Investigation 14 4 Master Chart for Location of Laboratory Specimens 26 5a…
  • p. 9 …The consulting engineering firm of Modjeski and Masters, Harrisburg, Pennsylvania 4. The consulting engineering firm of…
  • p. 22 …Steel using a digital computer, and were independently checked by the firm of Modjeski and Masters…
  • p. 29 …conducted by the firm of Modjeski and Masters to determine what influence surface corrosion may have…
  • p. 33 MASTER_CHART FOR LOCATION OF LABORATORY SPECIMENS
  • p. 86 …direction of the firm of Modjeski and Masters, consultants to the West Virginia Department of Highways…
  • p. 103 and Masters, has been described in Section III C of this report. The final paragraph of…
  • p. 137 …Y.; "Corrosion Survey of the Silver Bridge," Report by Modjeski and Masters, No. 1663, dated September…
  • p. 139 …Stress Concentration Factors," Letter Report, Lehigh University to Modjeski & Masters, dated July 9, 1969. 31. Slutter…
  • p. 151 …shipped to Fritz Engineering Laboratory by Modjeski & Masters 1. Eyebar 25'-4" ± c.c. pin holes…
Segment 801) Specimens 1-8

Point Pleasant Bridge U. S. Steel Results February 14, 1969 Revised: Feb. 26, 1969

U. S. STEEL LABORATORY DATA

Specimen2)	Hardness Near One Surface	Hardness at Center	Hardness Near Other Surface
1	22.5,22.5,21	22,21,21.5	23,23,22.5
3	22,22.5,21.5	20.5,20.5,20	22.5,22,22.5
4	21,22,21.5	20,20.5,20.5	22,22.5,23
5	21.5,21,21	20.5,20,20.5	22,22,22
7	21,21,21	20,20,21	21.5,22.5,23
8	20,21,20.5	21,21.5,22	22.5,23.5,21.5
 Rockwell C Hardness Across Cross-Section
Specimen	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
Run A	22.0	23.5	23.0	22.0	21.5	21.0	20.5	21.0	22.0	23.0	23.5	23.5	24.0	22.0
Run A	22.0	23.0	22.0	22.0	21.5	20.5	20.5	20.5	21.0	21.5	22.0	22.5	22.5	23.5	23

APPENDIX B

Specimen	Hardness	.025	.050	.075	.100	.125	.150	.175	.200	.225	.250	.275	.300
Run B	DPH
Rc3)	262
25	260
24.5	262
25	268
25.5	283
28	283
28	280
27	249
23	286
28	296
29	289
28.5	286
28
Run C	DPH
Rc3)	254
23.5	274
26.5	260
24.5	277
27	271
26	293
29	293
29	277
27	286
28	286
28
Run E	DPH
Rc3)	257
24	246
22	246
22	262
25	277
27	260
24.5	257
24	280
27	277
27	265
25	280
27	274
26.5
Run C	DPH
Rc3)	251
23	260
24.5	274
26.5	280
27	283
28	262
25	265
25	268
25.5	283
28	268
25.5

- B27 -

otes: 1). See Sketch C of Laboratory Specimen Plan.

2) See Sketch B of Laboratory Specimen Plan.

3) Converted from DPH using Wilson Conversion Chart.

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Document, cited by the archive. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 202 pages are in the text index: search them above, or from the library's search.