4 Cofferdams (Temporary Works) Risk Assessment Templates
Planned Cofferdam excavation in areas where live services may be present including:
• Electrical;
• Water;
• Sewerage;
• Gas;
• Telecoms;
PRIOR TO WORKS
Cofferdam Design under Temporary Works
Cofferdam excavation
Cofferdam sheet piling
Lifting operations
Confined space working – cofferdam
Installation of wales, bracing etc.
Maintenance of cofferdam
4 Cofferdams (Temporary Works) Risk Assessment Templates
Planned Cofferdam excavation in areas where live services may be present including:
• Electrical;
• Water;
• Sewerage;
• Gas;
• Telecoms;
PRIOR TO WORKS
Cofferdam Design under Temporary Works
Cofferdam excavation
Cofferdam sheet piling
Lifting operations
Confined space working – cofferdam
Installation of wales, bracing etc.
Maintenance of cofferdam
Civil v-hydrology and irrigation engineering [10 cv55]-notesSuryenn Edwie Mon
WRE: UNIT–I:
Surface Water Hydrology: Water Resources in India, Hydrology in water Resources Planning –Precipitation – Types,
Measurement of rainfall, Average depth of rainfall over an area, Mean annual rainfall, consistency of rainfall record, Double
mass curve; Infiltration – Factors affecting and its determination, Evaporation and Evapo-Transpiration. Runoff – factors
affecting runoff, methods of determination of runoff, stream gauging.
UNIT-II:
Hydrograph analysis: Base flow separation, Unit Hydrograph – Hydrograph of different durations, applications of unit
hydrograph, S-hydrograph, Flood Forecasting Techniques.
Ground Water Hydrology: Mechanics of interstitial flow, definitions, sub surface distribution of water, types of aquifers,
ground water movement, Darcy’s law, Well hydraulics – steady flow into wells in Un-confined and confined aquifers,
determination of hydraulic properties of aquifer, pumping test and recuperation test methods for determination of yield of
open well.
UNIT-III:
Reservoir Planning: Types of reservoir investigations for reservoir planning, selection of site for a reservoir, zones of
storage in a reservoir, reservoir yield, mass curve and demand curve, determination of reservoir capacity, yield from a
reservoir of given capacity, operating schedules, guide curve for reservoir operation, apportionment of total cost of a multi
purpose project, reservoir sedimentation, control of reservoir sedimentation, useful life of a reservoir.
UNIT-IV:
Irrigation: Definition of irrigation, types of irrigation systems – direct and indirect, lift and inundation irrigation system,
methods of irrigation – surface and sprinkler methods, drip irrigation, Soil moisture constants, depth of water held by soil in
root zone. Water requirements of crops, Duty, Delta, Base period and their relationship, crop seasons, factors affecting duty
and methods of improving duty, consumptive use of water, determination of canal capacities for cropping patterns.
UNIT-V:
Canal Systems: Classification of irrigation canals – canal alignment, design of unlined canals, regime theories – Kennedy’s
and lacey’s theories, tractive - force method, design problems – balancing depth of canal.
GE8076 -PROFESSIONAL ETHICS IN ENGINEERING UNIT NOTES
UNIT I HUMAN VALUES 10
Morals, values and Ethics – Integrity – Work ethic – Service learning – Civic virtue – Respect for others – Living peacefully – Caring – Sharing – Honesty – Courage – Valuing time – Cooperation –Commitment – Empathy – Self confidence – Character – Spirituality – Introduction to Yoga and meditation for professional excellence and stress management
An overview on Safety Audit | ConsultivoConsultivo
This overview on Safety Audit covers the key concepts of safety audit, audit feature, why it is required, the right approach and the requirements and standards for Safety Audit.
You may check here http://www.consultivo.in/audit/ for more information.
Civil v-hydrology and irrigation engineering [10 cv55]-notesSuryenn Edwie Mon
WRE: UNIT–I:
Surface Water Hydrology: Water Resources in India, Hydrology in water Resources Planning –Precipitation – Types,
Measurement of rainfall, Average depth of rainfall over an area, Mean annual rainfall, consistency of rainfall record, Double
mass curve; Infiltration – Factors affecting and its determination, Evaporation and Evapo-Transpiration. Runoff – factors
affecting runoff, methods of determination of runoff, stream gauging.
UNIT-II:
Hydrograph analysis: Base flow separation, Unit Hydrograph – Hydrograph of different durations, applications of unit
hydrograph, S-hydrograph, Flood Forecasting Techniques.
Ground Water Hydrology: Mechanics of interstitial flow, definitions, sub surface distribution of water, types of aquifers,
ground water movement, Darcy’s law, Well hydraulics – steady flow into wells in Un-confined and confined aquifers,
determination of hydraulic properties of aquifer, pumping test and recuperation test methods for determination of yield of
open well.
UNIT-III:
Reservoir Planning: Types of reservoir investigations for reservoir planning, selection of site for a reservoir, zones of
storage in a reservoir, reservoir yield, mass curve and demand curve, determination of reservoir capacity, yield from a
reservoir of given capacity, operating schedules, guide curve for reservoir operation, apportionment of total cost of a multi
purpose project, reservoir sedimentation, control of reservoir sedimentation, useful life of a reservoir.
UNIT-IV:
Irrigation: Definition of irrigation, types of irrigation systems – direct and indirect, lift and inundation irrigation system,
methods of irrigation – surface and sprinkler methods, drip irrigation, Soil moisture constants, depth of water held by soil in
root zone. Water requirements of crops, Duty, Delta, Base period and their relationship, crop seasons, factors affecting duty
and methods of improving duty, consumptive use of water, determination of canal capacities for cropping patterns.
UNIT-V:
Canal Systems: Classification of irrigation canals – canal alignment, design of unlined canals, regime theories – Kennedy’s
and lacey’s theories, tractive - force method, design problems – balancing depth of canal.
GE8076 -PROFESSIONAL ETHICS IN ENGINEERING UNIT NOTES
UNIT I HUMAN VALUES 10
Morals, values and Ethics – Integrity – Work ethic – Service learning – Civic virtue – Respect for others – Living peacefully – Caring – Sharing – Honesty – Courage – Valuing time – Cooperation –Commitment – Empathy – Self confidence – Character – Spirituality – Introduction to Yoga and meditation for professional excellence and stress management
An overview on Safety Audit | ConsultivoConsultivo
This overview on Safety Audit covers the key concepts of safety audit, audit feature, why it is required, the right approach and the requirements and standards for Safety Audit.
You may check here http://www.consultivo.in/audit/ for more information.
Engineers Who Kill Professional Ethics and the Paramountcy of.docxYASHU40
Engineers Who Kill: Professional Ethics and the Paramountcy of Public Safety
Author(s): Kenneth Kipnis
Source: Business & Professional Ethics Journal, Vol. 1, No. 1 (Fall 1981), pp. 77-91
Published by: Philosophy Documentation Center
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Engineers Who Kill: Professional
Ethics and the Paramountcy of
Public Safety
Kenneth Kipnis
Thou shalt not kill.
Exodus, Chapter 20.
Engineers shall hold paramount the safety, health and welfare of the
public in the performance of their professional duties.
Engineers' Council for
Professional Development,
Code of Ethics.
The codes of ethics of a number of engineering professional societies1 begin with
language that states that engineers are required in their professional work to hold
paramount the safety of the public. It is not difficult to appreciate why those in
engineering should feel obligated to endorse such a statement nor is it hard to
understand why it is generally placed first in the codes. For whenever we drive a car,
or fly in an airplane, or take an elevator, or use a toaster, or cross a bridge, or do
The work upon which this paper was based was supported in part by the National
Science Foundation and the National Endowment for the Humanities under Grant
Number OSS-7906980. Some of the ideas here were developed during participation in
the National Project on Philosophy and Engineering Ethics (at Rensselaer Polytechnic
Institute), funded by the National Endowment for the Humanities. For comments and
encouragement, I am indebted to Stephen H. Unger, David Davis, Sandra Ward, Robert
Bruder, Vivian Weil, Patricia Werhane, T. Paul Torda, Andrew G. Oldenquist, Victor
Paschkis, Edward E. Slowter, Win Nagley, Frank Tillman, Eliot Deutsch, Edward D.
Harter, Fred Bender, Deborah Johnson, and Sara Lyn Smith. Earlier versions of this
paper have been read at the American Society of Mechanical Eng ...
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
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CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
2. ENGINEERING AS SOCIAL
EXPERIMENTATION
Engineering as Experimentation
Engineers as responsible Experimenters
Codes of Ethics
A Balanced Outlook on Law.
3. ENGINEERING AS
EXPERIMENTATION
Experimentation (Preliminary tests or Simulations) plays a
important role in the design of a product or process.
Experimentation refers the activity, process or practice of making
experiments
In all stages of converting a new engineering concept into a
design like, First rough cut design,
Usage of different types of materials and processes,
Detailed design,
Further stages of work design and
The finished product,
Experiments and tests are conducted to evaluate the product.
Modifications are made based on the outcome of these
experiments.
4.
5. Engineering Projects VS. Standard Experiments
SIMILARITIES TO STANDARD EXPERIMENTS
Partial ignorance
The project is usually executed in partial ignorance.
Uncertainties exist in the model assumed.
The behavior of materials purchased is uncertain and not
constant
Uncertainty
The final outcomes of projects are also uncertain, as in
experiments. Some times unintended results, side effects (bye-
products), and unsafe operation have also occurred.
Continuous monitoring
Monitoring continually the progress and gaining new knowledge
are needed before, during, and after execution of project as in the
case of experimentation.
6. SIMILARITIES TO
STANDARD EXPERIMENTS
Learning from the past
Engineers normally learn from their own prior designs and infer
from the analysis of operation and results
The absence of interest and channels of communication, ego in
not seeking information, guilty upon the failure, fear of legal
actions, and mere negligence have caused many a failure
Eg: Titanic lacked sufficient number of life boats—it had only 825
boats for the actual passengers of 2227, the capacity of the ship
being 3547!
In the emergent situation, all the existing life boats could not be
launched. Forty years back, another steamship Arctic met with
same tragedy due to the same problem in the same region. But
the lesson was learned
7. Experimental Control
Members for two groups should be selected in a standard
experimental control ie.,Group A and Group B.
The members of the group ‘A
’ should be given the
special experimental treatment.
The group ‘B’do not receive the same though they are in the
same environment. This group is called the ‘control group’
Though it is not possible in engineering but for the projects
which are confirmed to laboratory experiments.
Because, in engineering the experimental subjects are human
beings who are out of the control of the experimenter
SoAn engineer has to work only with the past data available
with various groups who use the products.
DISIMILARITIES TO STANDARD EXPERIMENTS
8. DISIMILARITIES TO
STANDARD EXPERIMENTS
Humane touch
Engineering experiments involve human souls,
their needs, views, expectations, and creative use
as in case of social experimentation
9. DISIMILARITIES TO STANDARD EXPERIMENTS
Informed Consent
Engineering experimentation is viewed as Societal Experiment
since the subject and the beneficiary are human beings
When new medicines have been tested, it should be
informed to the persons who undergo the test.
They have moral and legal rights to know about the fact which
is based on “informed consent” before take part in the
experiment. Engineering must also recognize these rights.
Informed consent has two main principles such as knowledge
and voluntariness
Knowledge: The persons who are put under the
experiment has to be given all the needed information to
make an appropriate decision
Voluntariness: they must enter into the experiment without
any force, fraud and deception
10. Valid informed consent
The consent must be given voluntarily and not by any
force.
All relevant information shall be presented/stated in a
clearly understandable form
The consenter must be capable of processing the
information and to make rational decisions in a quick
manner.
The information needed by a rational person must be
stated in a form to understand without any difficulty and
has to be spread widely.
The experimenter’s consent has to be offered in
absentia of the experimenter by a group which
represents many experiments.
11. Informed consent - Engineering
the knowledge about the product
risks and benefits of using the product
all relevant information on the product
12. DISIMILARITIES TO STANDARD EXPERIMENTS
Knowledge Gain:
Scientific experiments have been conducted to acquire
new knowledge. Whereas engineering projects are conducted
as experiments not for getting new knowledge
Suppose the outcomes of the experiment is best, it tells us
nothing new.
Mean while, the unexpected outcomes put us search for
new knowledge.
Engineering experiments at the most help us to
verify the adequacy of the design
to check the stability of the design parameters
prepare for the unexpected outcomes
13. Responsible engineers in social
experimentation
The engineers have so many responsibilities for serving
society
Conscientiousness: A primary obligation to protect the safety
of human subjects and respect their right of consent.
Relevant information: A constant awareness of the
experimental nature of any project, imaginative forecasting of
its possible side effects and a reasonable effort to monitor
them.
Moral autonomy: Autonomous, personal involvement in all
steps of the project.
Accountability: Accepting accountability for the results of the
project.
14. CONSCIENTIOUSNESS (sense
of awareness)
Conscientious means showing that one cares about the doing
things well and thoroughly
It means commitment to live according to certain values
Engineers have to be sensitive to range of moral values and
responsibilities
Willingness to develop the skill and expend the effort needed
to reach the best balance possible among various
considerations.
Conscientiousness means consciousness because mere intent
is not sufficient.
Respect foremost the safety and health of the affected, while
they seek to enrich their knowledge, rush for the profit, follow
the rules, or care for only the beneficiary
15. RELEVANT INFORMATION:
Conscientiousness is impossible without
relevant factual information.
Engineers have to show the commitment to
obtain and properly gauge all the information
related to meeting one’s moral obligations.
Moral concern involves a commitment to
obtain and assess all available pertinent
information.
16. Comprehensive Perspective
The engineer should grasp the context of his
work and ensure that the work involved
results in only moral ends.
Not to Accept Design :-A product has a built-
in obsolete or redundant component to boost
sales with a false claim
17. Moral Autonomy
Viewing engineering as social
experimentation, and anticipating unknown
consequences should promote an attitude of
questioning about the adequacy of the
existing economic and safety standards.
18. Accountablility
Means - The capacity to understand and act
on moral reasons
Means being responsible, liable, answerable
or obligated.
Morally responsible peoples are expected to
accept morally responsibility for their actions
According to standley milgram, people are
not willing to accept personal accountability
when placed under authority
19. CODES OF ETHICS
Engineering Codes of Ethics have evolved over time
Codes of ethics are propagated by various professional societies
These codes of conduct are guidelines for specific group of
professionals to help them to perform their role
What are codes of ethics:
it is also referred as codes of conduct.
It express the commitment to the ethical conduct shared by
members of a profession.
It also define the roles and responsibilities of professions
This is used to help the professionals to apply moral & ethical
principles to the specific situations encountered in professional
practice
The codes are based on 5canons- principles of ethics-integrity,
competence, individual responsibilities , professional responsibilities
and human concerns
It is also noticed that ethical codes do not establish new ethical
principles
20. Positive Roles of codes of ethics
1. Inspiration
It provides +ve inspiration for the professional to
exercises their duties effectively
2. Guidance
It provide the guidelines for achieving the duties of
professionals
3. Support for Responsible Conduct
It offers +ve and potential support to engineers to
perform their duties in ethical manner
4. discourage and disciplining professional
conduct
These codes can be used to discouraging &
punishing unethical professional conduct
21. Positive Roles of codes of ethics
5. Education and promotion of mutual
understanding
The ethical codes can be
institutions and other places
used in educational
for highlighting the
importance of moral issues and values
6. Contributing to positive image of the profession
It discuss a positive image to the public of an
ethically committed professions
7. Protecting the status quo(current situations)
and destroying disagreement within the
profession
8. Promoting business interests through limit of
trade
22. Some of engineering societies
ASME- American society of Mechanical
Engineers
IE- The Institution of Engineers
NSPE- National Society of professional
Engineers
IEEE- Institute of Electrical and Electronics
Engineers
23. Limitations of Codes of ethics
The codes are not remedy for all evils. They have many limitations, namely
1. Codes are restricted to general and vague wording.
They cannot be straightaway applied to all situations.
2. It have internal conflicts, which may result in morel dilemma
3. The codes cant serve as the moral authority for professional
conduct
4. The circulation of codes of ethics for different branches of
engineering gives a feeling that ethical codes are relative
5. Not applicable to all situations
6. Even as members of the professional society, many are
unaware of the codes
7. Different societies have different codes
24. Balanced Outlook of Law
•A balanced outlook of laws emphasizes the
necessity of laws and regulations and their
limitations in governing engineering practice
•What is Law?
• It is a body of rules of action prescribed by controlling legal
authority and having binding legal force
• In general laws means all the rules established by authority or
custom for regulating the behavior of members of a
community or country
•Relationship between Laws and ethics:
• Ethics- what is ought to do, what is not
• Law – standard behavior required for individual
• 1969- Santa Barbara (offshore Spril)- 235000 gallon
crude oil
• 1758- babylons Building Code
• 1852 US Streamboat Code
• Baby Cribs
25. Balanced Outlook of Law
Laws with respect to social implementation
Laws are necessary because
People are not fully responsible
The companies are not encouraged to have moral
initiative due to competition
Engineers are expected to play vital role in
framing implementing and propagating the
rules of engineering. Strictly follow rules
Laws lag in technological development
Industries feel that laws are imposing
excessive restrictions on engineering
applications
26. Proper Role of Laws
The rules which govern engineering practice
should be construed as of responsible
experimentation rather than rules of a game.
In situations where the experimentation is
large and time consuming, the rules must not
try to cover all possible outcomes, and they
should not compel the engineers to follow
inflexible courses of action.
The regulation should be broad, but make
engineers accountable for their decisions,
27. Industrial Standards
Standardization primarily means setting up standards by which level,
quality, quantity, value performance or service may be evaluated
Simply, It is the process of defining and applying conditions required to
ensure that a given range of requirements can be easily met with minimum
changes in an economical and reproducible manner by the latest technique.
What are standards?
They are formed by companies for their in-house use and by professional
associations and trade associations for industry-wide use.
Some times standards are parts of laws and official regulations
ISO 9000-2000 series are typical examples in this direction
• The financial industry has given us countless scandals and front-page news stories about
financial professionals who have defrauded investors, employers and their peers.
• There is no doubt that greed is a powerful emotion, but sometimes unethical behavior
boils down to a lack of education on basic principles of financial standards
30. Benefits of standards
It helps manufacturers, clients and public
It maintain a steady and balanced
competition among industries
It ensure a measure of quality
31. Negative aspects of standards
Reduce choice for customers
It reduce initiative and interests of workers
32. Problems with law in engineering
Minimal compliance
Technological development
Many laws are ‘nolaws’ (without enforceable
sanctions)
Influential powerful persons violate the laws
33. The Challenger Disaster
A Case-study in Engineering Ethics
Shuttle Components
Orbiter
Liquid Rocket
Booster
Solid Rocket Booster
35. Chronology of the Related Events
1974
NASA contracts Morton Thiokol
1976
NASA accepts the design based on the Titan
missiles
The joints are sealed by
Two synthetic rubber O-rings,
177 clevis pins,
Heat shield putty
37. Early Problems
1977
Tests at Thiokol show O-ring leakage
Joint is made stronger by changing sizes
1981
Post-launch investigation showed O-ring erosion
due to hot gages.
38. Early Problems
January of 1985 launch
First cold-weather launch
Post-launch investigation showed joint failure
Tests showed O-rings inability to fill the gap due to
joint rotation at lower temperatures
39. Early Problems
July 1985
Thiokol redesigns the joints w/o O-rings – The
design was not ready for Challenger launch
40. Political Climate
Congress is unhappy with NASA
Competition with Russians to be the first to
observe Halley’s comet.
Pressure to launch before President
Reagan’s State of the UnionAddress
41. Days before Launch
First launch attempt postponed
The next launch date was set and was to be
attended by Vice President Bush.
The temperature at launch: 29 degrees F.
42. Days Before Launch
NASA starts an investigation of the effect of
low temperatures on the O-ring seals
Organization involved
NASA
Marshall Space Flight Center
Morton Thiokol
43. Engineering Investigation Before
Launch
Players at NASA
Larry Mulloy: SRB Project Manager at Marshall
Players at Thiokol
Roger Boisjoly: A SRB engineer
Arnie Johnson: A SRB engineer
Joe Kilminster: SRB engineering manager
Alan McDonald: SRB engineering director
Bob Lund: Vice president for engineering
Jerald Mason: General manager
44. Engineering Investigation Before
Launch
Boisjoly and Johnson recommend the launch
to be postponed.
Bob Lund, the VP for engineering agrees and
makes a similar recommendation.
45. Investigation Before Launch
Larry Mulloy, the NASA manager of SRB
asks Joe Kilminister, the SRB manager at
Thiokol, for his opinion.
Kilminister agrees with other Thiokol
engineers and recommends a launch
delay.
46. Investigation Before Launch
After discussion with Mason
Lund reverses his decision regarding launch!
Thiokol recommend the launch to proceed
47. The Launch in January 1986
The overnight temperatures drop to 8 F
The temperature of SRB at launch is 28 F
There is an immediate blow-by of hot gas at
launch. The seal fails quickly over an arc of
70 degrees.
48. The Launch in January 1986
The by-products of combustion forms a
glassy oxide that reseals the joint.
The brittle oxide is shattered
Hot gases quickly burn through the liquid
rocket booster
49. The Aftermath
Causes of the accident are attributed to
Inability of the O-rings to expand and seal at low
temperatures.
Heat shield putty did not perform at low
temperatures
Fits and seating of the O-ring was affected by low
temperature.
50. The Aftermath
After all the testimonials
Biosjoly is taken off the project and subtly
harassed by Thiokol management.