... paragraphs 3- 3 and 3- 5, respectively, to
assist the inspector during the preinspection.
(3) Review of previous inspection reports and operations records will aid in defining occurrence of
unusual ... reduces the torsional stability of miter gates during opening
and closing.
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Chapter 3
Periodic Inspection
3- 1. Purpose of...
... toughness of steel is generally a function of chemical
composition, thermomechanical history, and microstructure. Chemical composition affects the toughness of a
steel, since the addition of solute ... especially true of welds on riveted structures, since the
structural steels typically used in older structures are not characterized as steels for welding. A discussion of...
... oxidation) and the normal
waterline (wetting and drying promotes corrosion).
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3- 4. Visual Inspection
a. Visual inspection is the primary inspection method and ... according to paragraph 3- 3. A visual inspection is hands-on and requires careful and close
examination. The inspector should look closely at the members and connecti...
... inspected structures, date and time of inspection, type of inspection, inspection
procedure, inspection equipment, inspector identity and qualifications, and a record of discontinuities detected
that ... results of NDT.
(c) NDT Level III: An NDT Level III individual shall be capable of establishing techniques and
procedures; interpreting codes, standards, and...
... Behavior of Steel Materials
a. The operating service temperature of a steel structure has a significant effect on the fracture behavior
of the steel. For low- and intermediate-strength steels, ...
Structural Evaluation
6-1. Purpose of Evaluation
a. Structural evaluation is the process of determining the capability of a structure to perform its intended
f...
... of σ and a. Stress-intensity factors for various types of geometries can be
calculated using the information included in Figures 6-8 through 6-16 (Barsom and Rolfe 1987). Barsom and
Rolfe and ... the distance between the edge of component and edge of
crack in the through-thickness direction
Figure 6-4. Resolution of a discontinuity (after British Standards
Insti...
... Because of the history of problems at this site, a thorough
visual inspection was made previously on several gates.
(2) Inspection. An in-depth inspection was made of the gate with particular ... fracture toughness. A review of the hypothetical
design documents indicated that the gate had been fabricated from A36 steel. Since K
Ic
testing (ASTM E399)
of mild steels at re...