ⓘ Construction site safety. Construction work is a hazardous land-based job. Some construction site jobs include: building houses, roads, tree forts, workplaces a ..

                                     

ⓘ Construction site safety

Construction work is a hazardous land-based job. Some construction site jobs include: building houses, roads, tree forts, workplaces and repair and maintain infrastructures. This work includes many hazardous task and conditions such as working with height, excavation, noise, dust, power tools and equipment. The most common fatalities are caused by the fatal four: falls, being struck by an object, electrocutions, and being caught in between two objects. Construction work has been increasing in developing and undeveloped countries over the past few years. With an increase in this type of work occupational fatalities have increased. Occupational fatalities are individuals who die while on the job or performing work related tasks. Within the field of construction it is important to have safe construction sites.

                                     

1. Overview

In 2014, the United States had 4.679 fatal occupational injuries, an incidence rate of 3.3 per 100.000 full-time employed workers. In the same year, fatal work injuries in construction and extraction occupations increased 5%. One in five deaths of workers in 2014 were construction related. Construction has about 6% of U.S. workers, but 17% of the fatalities - the largest number of fatalities reported for any industry sector.

In the United Kingdom, the construction industry is responsible for 31% of fatalities at work and 10% of major workplace injuries. In South Africa there are 150 fatalities and approximately 400 injuries each year related to construction sites. In Brazil, the incidence rate for all occupational fatalities is 3.6 per 100.000. The chart below contains more countries and the rate of construction site fatalities.

                                     

2. Hazards

The leading safety hazards on construction sites include falls, being caught between objects, electrocutions, and being struck by objects. These hazards have caused injuries and deaths on construction sites throughout the world. Failures in hazard identification are often due to limited or improper training and supervision of workers. Areas where there is limited training include tasks in design for safety, safety inspection, and monitoring safety. Failure in any of these areas can result in an increased risk in exposing workers to harm in the construction environment.

Falls are the leading cause of injury in the construction industry, in particularly for elder and untrained construction workers. In the Occupational Safety and Health Administration OSHA Handbook 29 CFR used by the United States, fall protection is needed in areas including but not limited to ramps, runways, and other walkways; excavations; hoist areas; holes; form-work; leading edge work; unprotected sides and edges; overhand bricklaying and related work; roofing; precast erection; wall openings; floor openings such as holes; residential construction; and other walking/working surfaces. Other countries have regulations and guidelines for fall protections to prevent injuries and deaths.

Motor vehicle crashes are another major safety hazard on construction sites. It is important to be cautious while operating motor vehicles or equipment on the site. A motor vehicle should have a service brake system, emergency brake system, and a parking brake system. All vehicles must be equipped with an audible warning system if the operator chooses to use it. Vehicles must have windows and doors, power windshield wipers, and a clear view of site from the rear window. All employees should be properly trained before using motor vehicles and equipment.

Employees on construction sites also need to be aware of dangers on the ground. Cables running across roadways were often seen until cable ramp equipment was invented to protect hoses and other equipment which had to be laid out. Another common hazard that workers may face is overexposure to heat and humidity in the environment. Overexertion in this type of weather can lead to serious heat-related illnesses such as heat stroke, heat exhaustion, and heat cramps. Other hazards found on construction site include asbestos, solvents, noise, and manual handling activities.

                                     

2.1. Hazards Road construction

The American Recovery and Reinvestment Act of 2009 created over 12.600 road construction projects, over 10.000 of which were in progress as of 2010. Workers in highway work zones are exposed to a variety of hazards and face risk of injury and death from construction equipment as well as passing motor vehicles. Workers on foot are exposed to passing traffic, often at high speeds, while workers who operate construction vehicles are at risk of injury due to overturn, collision, or being caught in running equipment. Regardless of the task assigned, construction workers work in conditions in poor lighting, poor visibility, inclement weather, congested work areas, high volume traffic and speeds. In 2011, there were a total of 119 fatal occupation fatalities in road construction sites. In 2010 there were 37.476 injuries in work zones; about 20.000 of those were to construction workers. Causes of road work site injuries included being struck by objects, trucks or mobile equipment 35%, falls or slips 20%, overexertion 15%, transportation incidents 12%, and exposure to harmful substances or environments 5%. Causes of fatalities included getting hit by trucks 58%, mobile machinery 22%, and automobiles 13%.

Road construction safety remains a priority among workers. Several states have implemented campaigns addressing construction zone dangers and encouraging motorists to use caution when driving through work zones.

National Work Zone Safety Awareness Week is held yearly. The national event began in 1999 and has gained popularity and media attention each year since. The purpose of the event is to draw national attention to motorist and worker safety issues in work zones.



                                     

3. Hazard controls

Site preparation aids in preventing injury and death on construction sites. Site preparation includes removing debris, leveling the ground, filling holes, cutting tree roots, and marking gas, water, and electric pipelines. Another prevention method on the construction site is to provide a scaffold that is rigid and sufficient to carry its own weight plus four times the maximum intended load without settling or displacement.

Ways to prevent injuries and improve safety include:

  • Have a fall protection system
  • Make sure the workers are properly trained in appropriate areas
  • Prevent and address substance abuse to employees
  • Replace some of the works by robots many workers may worry that this will decrease their employment rate
  • Create accountability at all levels
  • Take safety into account during the project planning process
  • Innovative safety training, e.g. adoption of virtual reality in training
  • Make sure the contractors are pre-qualified for safety
  • Integrate safety as a part of the job
  • Adoption of BIM with three dimensional printing to make the building model first before put into real practice
  • Review accidents and near misses, as well as regular inspections
  • Management safety

The employees or employers are responsible for providing fall protection systems and to ensure the use of systems. Fall protection can be provided by guardrail systems, safety net systems, personal fall arrest systems, positioning device systems, and warning line systems. Making sure that ladders are long enough to safely reach the work area to prevent injury. Stairway, treads, and walkways must be free of dangerous objects, debris and materials. A registered professional engineer should design a protective system for trenches 20 feet deep or greater for safety reasons. To prevent injury with cranes, they should be inspected for any damage. The operator should know the maximum weight of the load that the crane is to lift. All operators should be trained and certified to ensure that they operate forklifts safely.

Operational Excellence Model to improve safety for construction organizations

There are 13 safety drivers associated with this model to improve safety for construction organizations:

  • Just & Fair Practices and Procedures
  • Human Performance
  • Risk Awareness, Management & Tolerance
  • Owners Role
  • Recognition & Reward
  • Strategic Safety Communication
  • Learning Organization
  • Training & Competence
  • Shared Values, Beliefs, and Assumptions
  • Transformational Leadership
  • Subcontractor Management
  • Employee Engagement
  • Worksite Organization

Each safety driver mentioned above has some sub-elements attributed to it.

                                     

3.1. Hazard controls Education and safety

Construction workers need to be properly trained and educated on the task or job before working, which will assist in preventing injuries and deaths. There are many methods of training construction workers. One method is coaching construction site foremen to include safety in their daily verbal exchanges with workers to reduce work-related accidents. It is important that the workers use the same language to assure the best communication. In recent years, apart from traditional face to face safety knowledge sharing, mobile apps also make knowledge sharing possible.

Another method is ensuring that all workers know how to properly use electronics, conveyors, skid-steer, trucks, aerial lifts, and other equipment on the construction site. Equipment on the job site must be properly maintained and inspected regularly before and after each shift. The equipment inspection system will help the operator make sure that a machine is mechanically sound and in safe operating conditions. An employee should be assigned to inspect equipment to insure proper safety. Equipment should have lights and reflectors if intended for night use. The glass in the cab of the equipment must be safety glass in some countries. The equipment must be used for its intended task at all times on the job site to insure workers safety.

Each construction site should have a construction site manager. This is an occupational health and safety specialist who designs and implements safety regulations to minimize injuries and accidents. He or she also is in charge of conducting daily safety audits and inspections to ensure compliance with government regulations. Most construction site managers have an entry level experience or higher degree.

Before any excavation takes place, the contractor is responsible for notifying all applicable companies that excavation work is being performed. During excavation, the contractor is responsible for providing a safe work environment for employees and pedestrians.

Access and egress are also important parts of excavation safety. Ramps used by equipment must be designed by a person qualified in structural design. No person is allowed to cross underneath or stand underneath any loading or digging equipment. Employees are to remain at a safe distance from all equipment while it is operational. Employees who have training and education in the above areas will benefit their co-workers and themselves on the construction site.

                                     

3.2. Hazard controls National Safety Stand Down

Every spring in the United States, many safety organizations sponsor a voluntary week-long campaign to raise awareness about falls in construction, the leading cause of death for construction workers. This event provides employers the opportunity to discuss safety hazards such as falls and how to prevent them. Even if a company doesnt have employees exposed to fall hazards, the safety awareness campaign can still be used to discuss other job hazards, prevention methods, and company safety policies.

In 2016, falls from elevation caused 92 of the 115 fatalities in the roofing industry as well as 384 of the 991 overall construction fatalities recorded. In 2016, falls from elevation were the leading cause of construction worker deaths in the U.S., fatally injuring more than 310 construction workers seriously injuring another 10.350 by falls from elevation. In 2016, the main causes of these construction related fall fatalities were falls from roofs 124, ladders 104, and scaffolds 60. Eighty one percent of deaths from roofs occur in the construction industry, 57% of deaths from ladders occur in the construction industry, and 86% of deaths from scaffolds occur in the construction industry.

Several of the top 10 most frequently cited OSHA violations every year involve fall-protection safety standards. Annual number of construction fatalities in the United States are listed in the table below:

The program was originally launched as a two-year project on Workers Memorial Day in 2012 to raise awareness about preventing falls in construction, but due to its success, it has been continued at the start of every construction season. In 2015, over 150 public events were held across the country, with over 150.000 workers and 1.5 million US Air Force personnel participating.

Organizations partnering with OSHA to sponsor this annual event include the National Institute for Occupational Safety and Health NIOSH, the Center for Construction Research and Training CPWR, the American Society of Safety Professionals ASSP, the National Safety Council, and many others. Resources to assist employers in finding activities are also available from multiple sources. The National Association of Home Builders NAHB and NIOSH have made several fall-prevention videos available to the public on YouTube, and the National Roofing Contractors Association has published three video webinars available for viewing.

The Lergent Developers has published a mobile app available for download, which helps workers to find authorized fall prevention course provider.



                                     

3.3. Hazard controls Personal protective equipment

Hard hats, steel-toe boots and reflective safety vests are perhaps the most common personal protective equipment worn by construction workers around the world. A risk assessment may deem that other protective equipment is appropriate, such as gloves, goggles, or high-visibility clothing.

                                     

4. Hazards and hazard controls for non-workers

Many construction sites cannot completely exclude non-workers. Road construction sites must often allow traffic to pass through. This places non-workers at some degree of risk.

Road construction sites are blocked off and traffic is redirected. The sites and vehicles are protected by signs and barricades. However, sometimes even these signs and barricades can be a hazard to vehicle traffic. For example, improperly designed barricades can cause cars that strike them to roll over or even be thrown into the air. Even a simple safety sign can penetrate the windshield or roof of a car if it strikes from certain angles.

The majority of deaths in construction are caused by hazards relating to construction activity. However, many deaths are also caused by non construction activities, such as electrical hazards. A notable example of this occurred when Andy Roberts, a father of four, was killed in 1988 in New York while changing a light bulb at a construction site when he came into contact with a loose bare wire that was carrying two thousand volts of electricity and died. Events like this have motivated the passing of further safety laws relating to non construction activities such as electrical work laws.



                                     

5.1. Regulation European Union

In Europe, the European Agency for Safety and Health at Work coordinates actions at the EU and national levels and the Directorate-General for Employment, Social Affairs and Inclusion is responsible for regulation at the EU level.

Under European Union Law, there are European Union Directives in place to protect workers, notably Directive 89/391 the Framework Directive and Directive 92/57 the Temporary and Mobile Sites Directive. This legislation is transposed into the Member States and places requirements on employers and others to assess and protect workers health and safety.

                                     

5.2. Regulation United Kingdom

In the United Kingdom, the Health and Safety Executive HSE is responsible for standards enforcement, while in Northern Ireland, the Health and Safety Executive for Northern Ireland HSENI is responsible. In Ireland, the Health and Safety Authority HSA is responsible for standards and enforcement.

                                     

5.3. Regulation United States

In the United States, the Occupational Safety and Health Administration OSHA sets and enforces standards concerning workplace safety and health. Efforts have been made in the first decade of the 21st century to improve safety for both road workers and drivers in construction zone. In 2004, Title 23 Part 630 Subpart J of the Code of Federal Regulations was updated by Congress to include new regulations that direct state agencies to systematically create and adopt comprehensive plans to address safety in road construction zones that receive federal funding.

OSHA implemented the Final Rule to Improve Tracking of Workplace Injuries and Illnesses, which went into effect January 1, 2017. It requires employers to submit incident data electronically to OSHA. This data will enable OSHA to use enforcement and compliance assistance resources more efficiently. The amount of data required varies by company and industry.

According to the latest statistics from OSHA, there are more than 13 job-related deaths each day in the U.S. with one in five of these being in the construction industry.



                                     

5.4. Regulation Hong Kong

In deciding the risk precautions, the employer has to provide different degrees of protection. Where one task happens to be more dangerous than another, a greater degree of care has to be taken, but where the employer cannot eliminate the dangerous task, reasonable precautions are needed to reduce the risk according to Nguyen Van Vinh v Cheung Ying Construction Engineering Ltd 2008. This does not, however, imply that an employer is required to remove every risk. The Lord Oaksey commented in Winter v Cardiff Rural District Council 1950 stated that" but this does not mean that an employer must decide on every detail of the system of work or mode of operation. There is a sphere in which the employer must exercise his discretion and there are other spheres in which foremen and workmen must exercise theirs.With regard to the decision how safety precaution has to be taken frequently, it should be left to the foreman or workmen on the site. Whilst the immediate employer of the employee is liable for safety, Morris v. Breaveglen 1993 ruled that the principal contractor cannot escape from his liability. The general employers argued that they should not be liable for the injuries as they were not exercising direct control over the workers. However, judges invalidated such contention in Rainfield Design & Associates Ltd v Siu Chi Moon 2000," he purpose of the Regulations was clearly to provide for the safety of workman and the primary responsibility for this must rest with the contractor responsible for the site. Even where a subcontractor had a contractual duty to provide plant and equipment, the contractor responsible for the site would not be relieved from its duty under the Regulations.”



                                     

6. Construction safety informatics

Li 2019 proposes that there are three generations of construction safety informatics which are relevant to construction safety enhancement:

1. The first generation of construction safety informatics consisted of technologies that relied completely on control by human beings; for example, structural equation modelling requires the work of an analyst.

2. The second generation of construction safety informatics included smart features such as the Internet of Things which can send information to human operators, without human intervention - from sensors, etc. Yet, these" smart” tools cannot learn and improve on their own capabilities.

3. The third generation of construction safety informatics uses state-of-the-art AI, to mimic human behavior and think, act, learn and improve on its own decision making. All that is required is that the relevant information is fed to these systems, so that they can be taught’

                                     
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