- The study examines the effects of wind loading on manually operated gates through direct measurements under varying wind conditions and comparisons to still air conditions.
- Wind loading can significantly increase the force required to operate gates, which may exceed safe manual handling limits and increase the risk of injury.
- There is little guidance available for operators to properly assess these risks, and wind is often not considered a significant factor in risk assessments.
Rectangular and Circular underground water tank Maliha Mehr
Rectangular and Circular underground water tank comparison.
Brief comparison of properties of rectangular and circular underground water tank.
Mechanical, economical and ease of construction comparison.
Rectangular and Circular underground water tank Maliha Mehr
Rectangular and Circular underground water tank comparison.
Brief comparison of properties of rectangular and circular underground water tank.
Mechanical, economical and ease of construction comparison.
We are an eminent Partnership Firm engaged in manufacturing, supplying and exporting a vast range of Industrial Sheds and Steel Structures. These are known for their unique designs, self adhesive nature, and thermal insulation properties.
We are an eminent Partnership Firm engaged in manufacturing, supplying and exporting a vast range of Industrial Sheds and Steel Structures. These are known for their unique designs, self adhesive nature, and thermal insulation properties.
Caught in Numbers, Lost in Focus: What it Means to Manage Safety in Global Sh...Nippin Anand
Have you ever wondered about how safety gets measured and how it became one with the ‘science’ of management (granted there is such a term as management science). What is the relationship between occupational health and safety and technical safety? How reliable is compliance as a measure of safety and how could we possibly distinguish between quality and safety?
Technology Encourages Employees To Promote Facility SafetyGarrett Foley
According to the US Bureau of Labor Statistics, more than 2.7 million nonfatal workplace injuries were reported in the United States in 2014. Workplace injuries and illnesses pose a serious problem in many industries including construction and manufacturing as well as facilities maintenance. Many employees fear that if they report safety observations that it will impact their job security or reputation. However, that is false. Employees should be encouraged to report safety incidents to establish a culture of safety. WorkplaceAware, a mobile safety application and online dashboard, allows employees and managers to report, track and resolve any and all safety and operations issues in the workplace.
Running Head: SAFETY IN AVIATION 0
SAFETY IN AVIATION 1
Safety in Aviation
Meshari Al-Shahin
Dr. Jennifer Nader
ERAU
Meshari Al-Shahin
1420 New Bellevue Ave
Daytona Beach, Fl 32114
Nov 6, 2018
Daniel Elwell
FAA
800 Independence Ave SW
Washington, DC 20591
Re: Safety in Aviation Submittal 1420 new Bellevue
Dear Mr. Elwell,
Enclosed is my aviation submission for safety in aviation at Embry Riddle Aeronautical University. My project was on aviation safety and from the word go relied on quantitative studies. The PDF packet includes 9 pages and breaks down as follows:
1. The letter of transmittal: pg.2
2. Abstract: pg.3
3. Analytical paragraph: pg.5
4. Introduction and Background: pg.6
5. Recommendation: pg.9
6. Conclusion: pg.10
7. References: pg.11
Considering the nature of report, it is limited in scope to different structure and platforms; we expect some challenges in the completion of research topic due to the time factor. I fully expect a further research and analysis of data applying statistical tools. On top of that, the project calls for analysis and recommendation of the research. The memorandum is attached to show the job allocation and scheduling thus I would require more time as I shall rely upon qualitative and quantitative tools of research. Therefore, I would request for a special consideration of all my sections of the project.
I would like to go ahead with my project on safety in aviation. Kindly pay a close attention to the progressive report of the work done and offer any green light for the completion of the project. Your guidance would be appreciated to the latter. Moreover, let me know if you experience any difficulties with my files or anything that seems to be not in order. You can contact me anytime via email at [email protected].
Thanks for your concern in advance,
Meshari Al-Shahin
Meshari Al-Shahin
Abstract
This paper summarized various measures taken for safety in aviation and considered the various responsibilities assigned to different people to ensure that there is a safe flying environment. The paper tries to provide solutions to the aviation industry that are effective for the aviation industry and useful to the employees in the industry, as well as travellers and used a problem-solution analysis. The report was designed to offer viable solutions to the problems that have arisen due to the expansion of air transport. An in-depth analysis of the issues surrounding the aviation management systems as well as the individual contribution to the general operations is highly scrutinized. Weather and climatic conditions were included as part of this study as it has been linked a large number of deaths because of poor insight, which thus have led to accidents. The recommendations include that it is advisable for .
Running Head: SAFETY IN AVIATION 0
SAFETY IN AVIATION 1
Safety in Aviation
Meshari Al-Shahin
Dr. Jennifer Nader
ERAU
Meshari Al-Shahin
1420 New Bellevue Ave
Daytona Beach, Fl 32114
Nov 6, 2018
Daniel Elwell
FAA
800 Independence Ave SW
Washington, DC 20591
Re: Safety in Aviation Submittal 1420 new Bellevue
Dear Mr. Elwell,
Enclosed is my aviation submission for safety in aviation at Embry Riddle Aeronautical University. My project was on aviation safety and from the word go relied on quantitative studies. The PDF packet includes 9 pages and breaks down as follows:
1. The letter of transmittal: pg.2
2. Abstract: pg.3
3. Analytical paragraph: pg.5
4. Introduction and Background: pg.6
5. Recommendation: pg.9
6. Conclusion: pg.10
7. References: pg.11
Considering the nature of report, it is limited in scope to different structure and platforms; we expect some challenges in the completion of research topic due to the time factor. I fully expect a further research and analysis of data applying statistical tools. On top of that, the project calls for analysis and recommendation of the research. The memorandum is attached to show the job allocation and scheduling thus I would require more time as I shall rely upon qualitative and quantitative tools of research. Therefore, I would request for a special consideration of all my sections of the project.
I would like to go ahead with my project on safety in aviation. Kindly pay a close attention to the progressive report of the work done and offer any green light for the completion of the project. Your guidance would be appreciated to the latter. Moreover, let me know if you experience any difficulties with my files or anything that seems to be not in order. You can contact me anytime via email at [email protected].
Thanks for your concern in advance,
Meshari Al-Shahin
Meshari Al-Shahin
Abstract
This paper summarized various measures taken for safety in aviation and considered the various responsibilities assigned to different people to ensure that there is a safe flying environment. The paper tries to provide solutions to the aviation industry that are effective for the aviation industry and useful to the employees in the industry, as well as travellers and used a problem-solution analysis. The report was designed to offer viable solutions to the problems that have arisen due to the expansion of air transport. An in-depth analysis of the issues surrounding the aviation management systems as well as the individual contribution to the general operations is highly scrutinized. Weather and climatic conditions were included as part of this study as it has been linked a large number of deaths because of poor insight, which thus have led to accidents. The recommendations include that it is advisable for .
7 STEPS TO LEADERSHIP EXCELLENCE IN WORK SAFETY & HEALTH. Abdul Shukor
Knowledge sharing session with Mr. CHRISTOPH MUELLER, CEO of Malaysia Airlines on 11th AUGUST 2015. In efforts to further enhance the performance of the airlines' workforce viz-a-viz Occupational health, safety and ergonomics, steps are proposed and considered. Excellent session throughout. Thanks to the CEO and the management of Malaysia Airlines for this invitation.
This presentation was given on the 14th of April 2016 during the EASA/OPTICS Conference in Cologne, Germany. It is almost the same presentation given previously at the CHC Safety & Quality Summit but includes a few additional slides about the initial results of the data collected.
Analyzing The Near Miss: Are companies overlooking crucial data?Garrett Foley
Near misses are predictive, showing the potential for future accidents. If a company doesn’t record its near misses, it’s missing a wealth of predictive information that could help prevent serious safety problems. For this reason, employees should be trained to identify near misses, and reporting these instances should be as quick and simple as possible. Nothing provides safety managers with more details and more trend data than near misses. They are the canary in the coal mine, helping to predict where, when, and why an accident will happen. With robust near-miss reporting, metal fabricators can catch safety issues long before they turn dangerous or even tragic.
arriers thatd due to lackm factorsthese causalent ca.docxdavezstarr61655
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Systems Model of Construction Accident Causation
Panagiotis Mitropoulos1; Tariq S. Abdelhamid2; and Gregory A. Howell3
Abstract: The current approach to safety focuses on prescribing and enforcing “defenses;” that is, physical and procedural b
reduce the workers’ exposure to hazards. Under this perspective, accidents occur because the prescribed defenses are violate
of safety knowledge and/or commitment. This perspective has a limited view of accident causality, as it ignores the work syste
and their interactions that generate the hazardous situations and shape the work behaviors. Understanding and addressing
factors that lead to accidents is necessary to develop effective accident prevention strategies. This paper presents a new accid
model of the factors affecting the likelihood of accidents during a construction activity. The model takes a systems view of acc
focuses on how the characteristics of the production system generate hazardous situations and shape the work behaviors, and
conditions that trigger the release of the hazards. The model is based on descriptive rather than prescriptive models of work be
takes into account the actual production behaviors, as opposed to the normative behaviors and procedures that workers “sho
The model identifies the critical role of task unpredictability in generating unexpected hazardous situations, and acknowl
inevitability of exposures and errors. The model identifies the need for two accident prevention strategies:~1! reliable production plannin
to reduce task unpredictability, and~2! error management to increase the workers’ ability to avoid, trap, and mitigate errors. T
causation model contributes to safety research by increasing understanding of the production system factors that affect the f
accident. The practical benefit of the model is that it provides practitioners with strategies to reduce the likelihood of acciden
DOI: 10.1061/~ASCE!0733-9364~2005!131:7~816!
CE Database subject headings: Occupational safety; Construction site accidents; Accident prevention.
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Introduction
In recent years, construction accident rates have declined
result of substantial effort by many parties. Increased pres
from OSHA and owners, and increased cost of accidents r
the contractors’ awareness. In turn, contractors increased
training and enforcement. These efforts have reduced the
and illness rate from 12.2 in 1993 to 7.9 in 2001. However,
rate of fatalities has shown little improvement—since 1997,
number of fatalities per year is consistently over 1,100~Bureau o
Labor Statistics 2004!.
The current appr.
Running head ACCIDENT INVESTIGATION1ACCIDENT INVESTIGATION5.docxSUBHI7
Running head: ACCIDENT INVESTIGATION 1
ACCIDENT INVESTIGATION 5
Accident Investigation
Student’s Name
Institution
Part 1
Events
Causal factor for the incident
1988- An incident tank is bought by southern Sun.
The company fails to fully inspect the incident tank before purchasing it.
1994-The incident tank is relocated from its original installation.
When relocating the incident tank, the company does not consider all safety measures and procedures.
1996- Southern Sun propane business is bought by Ferellgas.
Ferellgas did not ensure that all safety procedures are followed before buying propane business.
1996-2007- The incident tanks is filled 14 times annually by Ferellgas drivers and 140 pre-fill installations are done.
The employees do not wait until the tank is empty so as to avoid any corrosion of gasses.
2000- Two installation reviews are performed by Ferellgas employees on the propane system.
The installation reviews are not inspected by OSHA or any agency that ensures that all companies adhere to the set safety rules.
Part 2
Potential causal factors revealed in the analysis
From the analysis, it is clear that the incident would have been avoided. The analysis reveals that the company had not gone through all the required procedures in ensuring that the gas was safely stored. The propane tank was installed against the store’s wall. Propane is highly flammable whether in liquid or gaseous state. According to the rules and regulations of OSHA, any object or material that exposes employees to body harm should be kept away from the work premises. The company did not obey the rules when installing the propane tank against the wall. One of the reasons why the fire spread fast and damaged a lot of properties is because the tank was against the wall (Lenten, 2012).
How do these causal factors compare to the causal factors found in the CSB’s investigation report?
CSB’s investigation results stated that the fire was not a criminal act; however, the tragedy would have been avoided if all safety rules were followed. CSB’s investigation report is similar to the causal factors revealed in the analysis. Most of the procedures that would have helped in avoiding the tragedy were ignored.
Should there be more analysis?
In my own opinion, more analysis should not be done. The analysis that was already done gave satisfying results. The results have matched up with the incident. According to the way, the investigation was conducted, the results were satisfactory and there is no need for another analysis. Another analysis would have been conducted if the results did not solve the puzzle of the incident. The investigation bodies that conducted the investigations are competitive and resourceful. Every procedure that is important in an investigation was followed. The investigators are skilled and that is one of the reasons why the evidence collected helped in knowing the root cause of the incident (K ...
We picked the brain of a scaffolding expert, inhouse, and he gave us these basic but effective tips on how to work smart and stay safe on and around scaffolds.
So, whether you’re changing sky-high warehouse light bulbs or replacing windows on a two-story building, here's how to safely use scaffolds to get things done off the ground.
#building #scaffold #safe #animation
CompTIA exam study guide presentations by instructor Brian Ferrill, PACE-IT (Progressive, Accelerated Certifications for Employment in Information Technology)
"Funded by the Department of Labor, Employment and Training Administration, Grant #TC-23745-12-60-A-53"
Learn more about the PACE-IT Online program: www.edcc.edu/pace-it
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
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.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
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.
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.
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.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
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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.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
1. A case study into the effects of wind
loading on pushing and pulling manual
handling operations
James McCann
2015
2. A study into the use and operations of manually operated gates from a shop floor perspective
.
Introduction .
A Manager when asked, whatthe safe wind speed would be for safe operations of manually operated gates, did
not know! Nor did the manager know how much force was required to put the gate into motion even without the
effects of wind. As it would only require the wind to exert a force greater than that needed to set the gate in
motion and if uncontrolled to accelerate possibly to a dangerous extent, this should be or ought to be regarded as
a significant finding in a risk assessment. The Risk Assessments that were carried out indeed mention 'windy
conditions' however failed to further amplify what was meant by windy conditions, In any manual handling
operation it is the responsibility of those carrying out the work to carry out a Risk Assessment prior to
commencement of the work. This begs the question as to how the operators can carry out a dynammic risk
assessment prior to the operating of a manually operated gate, in windy conditions, that is 'adequate and
sufficient' if they do not have the information or tools needed to make the assessment? Or indeed what the safe
parameters are after the assessment. One suggestion that was made, was for theoperators to 'test' whether or not
they can operate the gate safely! This would be akin to testing whether a gun was loaded by pulling the trigger.
Operators have complained of aches and pains after prolonged use, there have also been a number of accidents
and near miss reports involving 'windy conditions' as being a contributory factor that have not been taken into
consideration
The HSE guidance regarding Risk Factors to be considered TILE;- TASK, INDIVIDUAL, LOAD &
ENVIRONMENT appears to underplay the influence of wind as a significant hazard to manual handling
operations seemingly sending the wrong measage regarding communication of risk. Manual handling injuries
reportedly contribute to one third of all 3 day absence, one wonders to what extent wind played as a factor in
these manual handling injuries?
A further suggestion that if in doubt, another person will be asked to help. None of the gates examined in this
study were found to be suited for 'team' operating and it is doubtful that the HSE guidanceof "2/3 the combined
capacity" would be appropriate for any gate operations as the positioning of adequate handles would
undoubtedly make coordination difficult and increase therisk of serious injury. None of the gates looked at have
extra handles for 'team operation' and in some cases are not been fitted with any handles!
It has been observed that gates are frequently used as convenient places to place site information notices, this
practice increases the effect of wind loading on the gate by increasing the effective surface area exposed to the
wind.
Accidents; In simple terms, when the wind acts on a gate, the gateacts like a sail. The magnitude of the wind
pressure will be at its greatestwhen acting perpendicularly to the gateand willdecrease proportionally as the
gate opens or closes, to use a sailing analogy 'luffing' or depowering of a sail. If the initial impetus from the sum
of the wind and human force is greater than the force required to keep thegate in motion then thegate will
accelerate and require an equal and opposite force to stop the momentum. If this force is greater than can be
controlled by the operator they willeither be dragged or willlet go and the gatewill swing out of control until it
reaches a solid object that will absorb or disperse the kinetic energy . The greater themass of the gate the
greater the kinetic energy and thegreater thecrash. When the wind strength is gusting and the area of the gate is
large enough then the force exerted by the wind maybesudden and overwhelming for the operator, in tests a
2000 kg gate reqired an impetus of 9kgf and a continuous force of 5kgf to maintain a walking pace of 3mph
however a gust of wind recorded an increase to 21.5kgf requiring theoperator to exert an equal and opposite
force (pulling) to bring thegate safely to a halt, simmilarly when closing the gate the operator experienced an
increase in effort to the same magnitude increasing to 21.5kgf (pushing) over a distance of 7m in this case the
3. greatest magnitude was at the end of the travel distance and theoperator now had to change sidesand hold the
gate with one hand inorder to secure the retaining bolt. This operation being repeated several times in a one hour
period.. Other environmental conditions included: heavy rain, cold, poor ,lighting and night shift, dressed in full
ppe of high visability jacket and over trousers on top of a uniform.
In one reportable (over 3 days) accident which involved opening and closing a 1500kg gate 4 x 4m in a full
force eight gale to allow upto 12 pedestrians access between 0700 and 0800 unaware that the securing hook had
not engaged properly the guard moved towards a pedestrian to check their id passes and was hit from behind
and catapulted into the opposite gate leaf and trapped by the closing leaf, he sustained damage to three vertebrae
and a chipped thigh bone. The cause of this accident was investigated from an office and declared as an operator
error, on inspection of the risk assessment there was no mention of wind, although mentioned in the assessment,
the reason a pedestrian gate or automation were not put in place (although the electrical controls were fitted),
was that it was not cost effective? how this computation was made is unclear. Not cost effective is simply
another way of saying 'notreasonably practicable' The test here would be 'Edwards v. The National Coal Board'
and in Coltness Iron Co v Sharp. Lord Atkin said: "The time of non-protection is so short, and
the time, trouble and expense of any other form of protection is so disproportionate that I
think the defence is proved." This shows that in every case it is the risk that has to be weighed
against the measures necessary to eliminate the risk. The greater the risk, no doubt, the less
will be the weight to be given to the factor of cost.
There would appear to be a number of conflicting 'risk perceptions' at work here or perhaps one of the many
myths surrunding risk , Sven Ove Hanssson Philosophy Unit RIT Stockholm et al . The risk to the individual
and the risk to security. Empirical v. Intelegence
There appears to be little or no empirical data available for manual handling of large single or double leafed
gates and the effects that wind loading has on them, this is probably as a result of increased automation
C RR 248/1999. AK Weyman & CJ Kelly In their Repor t highlight the many Risk Per ception & R isk
C ommunication Theor ies. One particular comentary stood out "However, the degree of consensu s
r egarding the precise nature of the influence of organisational role on per ception of r isk appear s to be
limited Lee et al (1993) for example, pr ovide findings which indicate that managers and supervisor s tend
to be mor e cautious in their appr oaches to r isk than workmen. By contrast other stu dies have shown that
supervisor s ar e poor sour ces of risk information and have a tendency to und erestimate r isk, r eportedly
they ar e 'too far r emoved from operations to make meaningful assessments, R osner & Markowitz (1995)
or mor e exposed to pr oduction pr essur es than other staff, Ostber g (1980) .
There are of course many other reasons and theories suggesting reasons for poor risk communication, perhaps
the expression ' aquila non capit muscas' may have some resonance whereby opening of gates is generally a
security function carried out by low skilled staff and health and safety is percieved to be a low priority over
security and perhaps it is only for those in the lowest levels of organisations that the cost of automation "is not
cost effective". This came into sharpe focus recently, The BBC Reported that a security officer in India was
murdered by being run over, for, "not opening a security gate fast enough" Other communication failures have
come to light whereby security officers failed to express their reasoning for having a security gate open " the
gate was too heavy" theresponse " no heavier than yesterday, now get it closed" the difference between the days
in question was that the previous day there was no wind on the next a gale force 8 was blowing!. From first
hand experience the higher the security risk the less health safety or welfare are considered! The less authority
4. within an organisation the less likely to challenge poor decission making by those with authority, this manifests
it's self in statements ' just get on with it' and ' you will have to put in a business plan' before changes can be
made. This becomes more evident when on closer inspection many of the gates were found to be below
industry standards to the point of being extremely dangerous. Fig 3, 1, 2, 3 5, 6, 7 & 8
It is regognised that gates come in different sizes, mass and drag coefficient making it difficult to give a more
accurate estimate compared with other push/ pulling manual handling operations, however it is believed that
sufficient data can be obtained that will allow guidance to be given as to the effects of wind loading to enable a
risk assessment to be made that is adequate and sufficient to reduce the risks to ALARP or indeed to justify
automation. Many of the gates looked at were installed prior to much of the regulations now inforce and only
recently brought into operation or back into operational use after many years of restricted use.. The imperative
to bring back these gates would appear to override safety issues or that the risks to security justifies the means,
this attidudinal disconect from policy which "inextricably linked H&S to security" manifest it's self in
comments by managers and supervisors to "just get on with it" neither empirical or epidemiological evidence
being considered, risk assessments apparently downplaying risk or ignoring wind as a significanthazard
Manual handling of loads, pushing and pulling, this type of operation is discused in HSE RR526 Fig 1 giving
data on frequency of pushing and pulling loads, giving guidance estimates of safe loads over distance and time/
frequency of pushing and pulling activities and is a usefulstart point.
The data collected and reproduced in RR526 was however obtained under laboratory conditions and were not
influenced by other contributory environmental factors or conditions such as wind loading. Although air
movement is mentioned as a contributory factor, contextually, 'draughts' only refer to an indoor environmental
condition and would not have sufficient energy to be regarded as significant to the load being pushed or pulled
but may have an effect on the operator I.e. Comfort.
There is also the problem of how to work out the math involved e.g. angular momentum/ torque the sum of the
forces, with or against the wind force, both positive or negative and measuring angles / vectors e.t.c. This is
complicated enough but becomes almost imposible where the wind force is unpradictable and variable, to
complicate matters the designs or where construction materials and dimentions differ make it unrealistic that
'generic' Risk Assessments would be sufficient Fig2 demonstrates the generic type risk/hazard identification
associated with gates.
There are two elements of risk associated with wind loading, first, the increase/decrease in load force for the
operator and second, the uncontrolled acceleration caused by wind loading. Unlike other manual handling
operations, pushing and pulling of gates or loads are often subject to sudden increase and or decrease of load
from the effects of wind . The analogy here would be pushing and pulling a load using a trolly, where, sudden
and unpredictable varying degrees of slopes appeared out of nowhere. Opening a gate or moving a load maybe
easier with the wind however converslely closing or changing direction would be subject to an increase in effort
from the effect of the wind acting against the gate or load. Gusting winds are more difficult to contend with, the
increased pressure may be sudden and overwhelming or again conversely a sudden drop in wind pressure may
be difficult to compensate for and control resulting in an increase likelyhood of serious injury.. These problems
are exacerbated by the lack of suitable handles often only one being fitted on one side of a gate or the only
handle thatis available is fitted on a slide bolt, often only a short metal bar.
The HSE, through examination of reported accidents, have determined that 11% musculoskeletal injuries
resulting from manual handling operations are associated with pushing or pulling loads, however it is unclear
whether any of the reported incidents included wind loading as a contributory factor.
5. Wind loading is recognised in many other areas of Health and Safety I.e crane operations and also plays a major
role in structural engineering
There is little to no wind loading information available in Gate Manufacturers Data sheets e.g. Pitts Security
Gates, Barriers, Blockers and Bollards PAS 68 Range, et al. British Standards BS EN 13241-2003, BS EN
12635-2002 BS EN 12605, BS EN 13849 - 2008 Although some of these Standards reference automated gates,
many of these gates can be disconected from their power source and can be operated manually when necessary.
Swing type security barriers found in e.g. Carparks, were the subjectof a HSE warning alert after a number of
accidents being reported (HSE Advice on horizontal swing carpark barriers) A number of simmilarities are
apparent, human intervention, locking mechenisms, the effects of wind and poor lighting and safety marking.
It is doubtful that mechanical dampening devices would be beneficial as they would only control sudden
changes in force however thepush pullforces would remain.or indeed be increased.
OBJECTIVES The purpose of this study is to examinethe effects of wind loading on manually operated gates.
Recognising that the operators would not have access to measuring devices inorder to carryout adequate or
sufficient risk assessments prior to operating the gates. To give managers and operators guidance on the safe
perameters for manually operating gates thatare simple and easy to understand
Examine if wind loading increases the load above the accepted limits 20kgf for men 15 kgf for women, 10 kgf
and 7 kgf respectively for keeping the load in motion. The HSE advise " that even for a minority of fit well
trained individuals under faverable conditions, may if the operation guideline limits are exceeded by a factor of
2 or more may be at risk of serious injury"
Determine the operationalloads in stillair
Determine wind speeds above which wind loading would increase the likelyhood of serious injury
Devise a graphicmanual handling toolthat willgive clearly understood inform
Determining risk factors for inclusion in the graphicmanual handling tool
l Provide estimates of impact(kinetic energy) forces from the gates whilst in motion
l We will be looking at the effects of wind loading on gates as they affect the manual operation and not the
structural integrity or design of the gates themselves but concentrating on the generality of the effects that
wind loading may have and to prepare guidance on contributory risk
l For ease of calculation a number of assumptions are being made, area of the gates in question will be
regarded as solid flat surfaces this will give an absolute maximum for wind pressure acting on the gate.
Angular movement/acceleration will be regarded as non vector or torque for simplicity of calculation as
wind direction is complex and variable therefor willbe calculated as perpendicular to thegate, again giving
a maximum for wind loading. It will be assumed that the greatest area of danger for the operator is at the
furthest from the hinge and refered to as the impact zone (IZ) . For the purpose of these calculations it is
not necessary for a higher degree of accuracy however if a higher degree of accuracy is required this may
be achieved by using the data and appropriate non linear formulas. The angle of wind direction relative to
thegate willbe recorded for those that wish to make more accurate assessments.
l As the most important factor will be that of wind pressure acting on the gates and not the capabilities of
the opperators, it is intended to make direct measurements under a range of wind conditions and compare
them to those taken under still air conditions this will give a direct comparison of increased loading on
gates of different dimensions and construction under different environmentalconditions
l Wind speed = m/s
6. l Acceleration =m/s^2
l Mass = kg
l Wind pressure = kg/m^2 = N/m^2
l Force, pushing or pulling required to control the gatein motion = kgf
Fig 1
Fig 1 It would be tempting for managers not to consider wind as a significant hazard. For managers,
RR526 Although "other environmentalfactors" have to be considered it is believed thatthisreport missed the
significance of the effects of wind on high risk push pull operations being carried out
7. Figure 2
Fig 2 . For the average person, carrying out the mathmatics prior to a manual handling
operation (push pull) would be wholly unreasonable and like an Inspector "who do not
typically pocess objective force measuring equipement " RR562 Executive
Recommendations, et al, would be unrealistic
8. Figure 3 Typical layout for identifying risk areas on gates
Note that the forces required to operate the gate or frequency of use (push pull manual
handling) handles and fittings are absent nor is wind identified as a significant factor. The
'weight' of the gate is supported by the hinges and load bearing style however the mass of the
gate is independent of how the weight is supported.
9. Fig 4a Guidance to the increase in force required to control the loading
Figure 4a A suggested diagram of the extra force needed to carryout push pull opperations.
where wind is a significant factor. For simplicity and ease of use this diagram uses the same
'traffic signal' format and should be used in conjunction with the load diagram Fig 1. The
combination of wind pressure in N/m^2 and the bodily force in kgf to control the gate whilst
in motion
10. Fig 4b
Fig 4b Wind force conversion
Figure 5. Suggested data for inclusion
11. Figure 5 Data collection
Data collection
Details of the gates, construction, dimensions and approximate mass..
Number of hinges and fittings
Orientation I.e 270°-90° = East / West. 0° - 180° = North / South
Wind speed and direction (from perpendicular to the gate) 0° = perpendicular .
Defects
Environmental conditions, day, night, rain, lighting etc.