Roller Compactor description. A roller compactor is a type of engineering vehicle used to compact soil, gravel, asphalt, or concrete in the construction of roads and foundations.Its nickname is the
1. Roller Compactor
2. Roller Compactor description
3. Roller compactor components
4. Roller compactor history “Since the effectiveness of a roller depends to a large extent on its weight, self-powered vehicles replaced horse-drawn rollers from the mid 1800s. The first such vehicles were steam rollers. Double-cylinder designs were preferred. Single-cylinder steam rollers were uncommon and unpopular, as the power impulses from the steam engine would produce slight waves in the road. Some road companies in the United States used steamrollers through the 1950s, and in the UK, some remained in commercial service until the early 1970s.”
5. History continued “As internal combustion engine technology improved during the 20th century, kerosene-, gasoline- (petrol), and diesel-powered rollers gradually replaced their steam-powered counterparts. The first internal-combustion powered road rollers were very similar to the steam rollers they replaced. They used similar mechanisms to transmit power from the engine to the wheels, typically large, exposed spur gears. Some companies did not like them in their infancy, as the engines of the era were typically difficult to start, particularly the kerosene-powered ones.”
6. Uses/characteristics The roller compactors use the weight of the vehicle to compress the surface that is being rolled.
Rollers can also be used in landfill compaction.
Some roller compactor drums can be solid or filled with water depending on its use. The different drums include:
Single-drum sheeps/pad-foot (soil)
Single-drum smooth (asphalt)
Double-drum (duplex) sheeps/pad-foot (soil)
Double-drum (duplex) smooth (asphalt)
3-wheel cleat with bulldozing blade (landfills)
There are many different types of roller compactors ranging from 100lbs to 44,000lbs and costing over $ 150,000.00.
7. types of roller compactors Powered vibrating walk –behind Pneumatic Roller for initial compaction
Ride-on with articulating swivel Vibrating Dynapac
8. Related hazards
The main hazard associated with large roller compactors are rollovers.
Other Hazards include:
Run over by
9. Roller compactor hazards Injuries
Between 2000-2006 over 50 rollover incidents have been recorded.
5 incidents involved roller compactors with rollover protective structures (ROPS) where operators used the seatbelts provided.
19 involved roller/compactors with ROPS, but seatbelts were not used. In some cases, seatbelts were not provided. In other cases, the seatbelts provided were not used by the operators. Fourteen of these accidents resulted in fatalities. In a number of these cases, the operator was either ejected or jumped from the equipment, and was pinned under or crushed by the ROPS
1 case involved a pneumatic rubber-tired roller/compactor where the ROPS and seatbelt had been removed prior to the accident. The operator involved was fatally injured in the accident.
10. Roller Compactor hazards Injuries
6 cases involved pneumatic rubber-tired roller/compactors without ROPS. In all of these cases, the accident resulted in a fatality.
Injuries related to roller compactors seem to all fall under the same few categories. With the right training and a competent person behind the compactor these injuries and fatalities can be prevented.
Note: It is important that any operator check all aspects of his machinery before it gets put to use.
11. Roller Compactor Hazards Fatalities
According to the National Institute for Occupational Safety and Health (NIOSH) Census of Fatal Occupational Injuries, of the 282 deaths associated with road grading and surfacing machinery during 1992-2007, at least 70 of these deaths were associated with roller/compactors.
12. OSHA Regulations While OSHA does not have a standard requiring employers to use ROPS or seatbelts for this type of roller/compactor equipment, it is important for employers to understand that under the General Duty Clause of the OSH Act (section(5)(a)(1)of the Act), employers must provide their employees with a workplace that is free from recognized hazards likely to cause death or serious physical harm. It is OSHA’s position that the hazard of equipment rollover is a “recognized hazard” within the meaning of the General Duty Clause of the OSH Act. [3, 4] In cases where the employer chooses to operate these types of machines in areas where the potential for rollover is present (e.g., loading or unloading, operating on slopes or near slope edges, etc.) and the equipment is not equipped with ROPS and seatbelts, a General Duty Clause violation may exist.
13. osha regulations In addition, OSHA’s Construction Standard "General safety and health provisions," 29 CFR 1926.20(b)(4), states "the employer shall permit only those employees qualified by training or experience to operate equipment and machinery." Section 1926.21(b)(2), “Safety training and education,” states further that “the employer shall instruct each employee in the recognition and avoidance of unsafe conditions….” Therefore, employers performing construction work are required to ensure that roller/compactor operators are trained to use the equipment properly and to understand how to recognize those situations and conditions that pose a rollover hazard. For example, operators need to understand that:
soft edges can cause one side of the equipment to sink and therefore may pose a risk of rollover;
turning away from a slope with articulated steering can destabilize the compactor;
improperly inflated tires can destabilize roller/compactors; and
rain or wet conditions can pose a hazard during unloading and can increase the possibility of rollovers near embankments as soil conditions become unstable.
14. Roller Compactor Safety In order to maximize the amount of best work practices, the operator must be well trained in operating this type of machinery and must be provided the proper personal protective equipment.
Some of the PPE included during operation of this type of equipment would include:
Proper foot protection
The operator must also be aware of his/her surroundings at all times when operating this piece of equipment.