Struck-By/Caught-Between

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Presentation transcript:

Struck-By/Caught-Between Module 4 Struck-By/Caught-Between

DISCLAIMER This material was produced under grant number SH-22248-1 from the Occupational Safety and Health Administration, U.S. Department of Labor. It does not necessarily reflect the views or policies of the U.S. Department of Labor, nor does mention of trade names, commercial products, or organizations imply endorsement by the U.S. Government.

Objectives After this module you should be able to identify the most common struck-by and caught-between hazards take the necessary steps to avoid those hazards

First, Let’s Talk About Struck-By’s A struck-by is an accident in which any part of the body is struck by an object that is in motion, whether moving, swinging, flying, falling, etc.

Struck-By Hazards Site clearing Moving pipe and casing Using tongs and spinning chain Falling overhead objects Working around mobile equipment Loads being moved Improper use of hand tools Whipping pressurized lines Using elevators Using turnbuckles and load strapping

Tree Felling Struck-By’s Figure out the best felling direction Plan, clear, and use an escape path Figure out the proper hinge size Use proper controlled felling techniques Maintain safe separation distances from other workers or machines Wear required PPE When a tree must be removed, there are several things to consider before cutting. 1. Ensure coworkers and all others maintain a two-tree length distance. If the tree is going to fall downhill, increase the distance depending on the slope. 2. Look for any fences, buildings, or power lines and avoid felling toward them. 3. Work only in good weather. Never work in strong winds, lightning, rain, or any time when visibility is low. Inspect the tree: Is the tree leaning in one direction? This will play a major role in the direction the tree will fall. Check the trunk (where the cuts are going to be made) for knot holes, cracks, or signs of rot that could hinder the felling operation. Ensure the tree has no interlocking branches or vines from another tree. If it does, they must be separated prior to felling. Also, survey the crown of the tree for any material that may break loose as the tree falls. Trim any low branches that are in your way. http://www.oznet.ksu.edu/library/ageng2/MF2712.pdf Danger! Tree felling requires special training!

while the rig is being set up at the site, workers can get struck by a crane, load, truck, forklift, tool, etc. This photograph shows workers in the process of setting up a rig, laying one of the substructures or “subs” down. Many tasks are going on at once during a rig setup, so a worker must use caution to prevent getting struck by a crane, load, truck, forklift, tool, or other piece of equipment or materials. it’s important that the worker is knowledgeable of the hazards present and is aware at all times of equipment around them

a worker can get struck by moving, swinging, or falling drill pipe This photograph shows a catwalk which is the item that moves pipe from ground level up to the rig floor. When this action is taking place, workers at ground level should stand clear of the catwalk and workers on the rig floor that aren’t directly involved in the task should stand clear of the area where the pipe is raised. The pipe has a chance of falling onto a worker or shifting or swinging into a worker. stand clear of this area when pipe is being lifted to the rig floor

while tripping in/out, a worker can get struck by tongs or spinning chain This photograph shows workers using tongs. Workers should stand clear of the swing radius of the tongs and spinning chain to prevent getting struck by these items. A diagram of the tong swing radius is on the next slide. always determine and stand clear of the swing radius of these items when possible [see next slide]

Workers should not enter the red area unless it is necessary; workers should use extreme caution. Workers should use caution and stay alert while in the yellow area.

if connections break free, high-pressure lines and hoses can quickly become struck-by hazards This photograph shows a high-pressure line that has had a whip-check installed on it. Workers installing these lines and hoses should ensure that they are properly and securely connected including ensuring that the right size hammer union is used, that those connections aren’t worn, and that whip-checks are installed. ensure that lines and hoses are properly secured, connections are not worn, and whip-checks are installed

a small crack or other damage to a hand tool can cause a struck-by incident This photograph shows a sledge hammer that has several cracks in its handle near the head. This indicates that the head of the tool may have loosened up from the handle and therefore may fly off while the sledge is in use. Another very common occurrence is for the head of the hammer to mushroom at the end. This can cause small pieces of the hammer to fly off and strike a worker. The edges of mushroomed heads must be taken off by the use of a grinder. Workers should inspect tools for this type of damage before each use. Those tools that are found to have damage must be taken out of service. Corrective Actions: inspect tools before use; take defective tools out of service

as much as possible, stand clear of the cable while it is under stress cable used to rig this load up may suddenly snap, slicing anything in its path This photograph shows a load being lowered into place by a tandem truck during a rig setup. as much as possible, stand clear of the cable while it is under stress

a tool stuck through the middle of a turnbuckle to tighten it can kick back and strike you use a crescent wrench at one end of the turnbuckle to tighten it

this load could shift or fall suddenly striking or falling on the worker Corrective Action: a tag line would be ideal here; take the time to set one up before the lift

this is another example of where a tag line should be used

if they attached the tag line to the load rather than the rigging, these employees would be correctly using a tag line

while working at heights, if you loose your grip on a tool, it could fall onto a worker or equipment use a device like this or simply use a tail rope to keep tools from falling

Now, Caught-Between’s A caught-between is an accident in which the whole body or part of the body is pinched or crushed between objects.

Caught-Between Hazards Moving pipe and casing Using tongs and spinning chain Working around mobile equipment Unguarded moving parts Working under suspended loads Improper use of hand tools Wearing loose clothing Improper handling of slips or elevators

crushing hazards can exist when setting up the rig This photograph shows the substructure or “a sub” being lowered into position by a tandem truck which is being guided by the two workers. This stage is early in the process of a rig setup. With all the pieces of the rig being moved around, workers must be careful not to stand or put any part of their body under a suspended load. For increased visibility during rig moves, it is recommended that workers wear high-visibility vests. always stand clear; keep hands and other body parts away

while tripping in/out, a worker can get caught between tongs or spinning chain This photograph shows a worker using spinning chain. Workers can get fingers pinched while using tongs or spinning chain. Workers should always wear gloves while tripping in/out. The importance of good communication between workers should be stressed.

worker’s fingers or hands can get smashed when setting the slips This photograph shows workers setting the slips. Workers must keep their hands on the designated handles while setting the slips in order to keep their fingers or hands from getting pinched between the slips and the pipe the slips go around. always keep hands on the handles

always place hands on designated handles workers’ hands or thumbs can get caught between the elevator and the stump This photograph shows workers using elevators to grab onto the stump or a joint(s) of pipe that has been placed into the mouse hole. The elevators grab onto the pipe and lift it onto the drill string, therefore adding more joints of pipe to the drill string during the tripping in process. Workers can get their thumbs or fingers caught between the elevator’s grip and the stump. Workers must always keep their hands on the designated handles. always place hands on designated handles

this worker is cutting through a bad spot while the truck is moving This photograph shows a worker walking between a truck and a structure while the truck is moving. The truck could make a sharp turn and pin the worker to the structure. Many times space is limited on site. Workers must use caution when walking near mobile equipment. This worker should wait until the truck is parked before walking through this space. Corrective Actions: never take chances like this when the space is this limited; wait until the truck parks

always use a spotter when what is behind you cannot be seen

belt and pulleys of machines are common pinch points This photograph shows a properly guarded pulley system on a machine [1910.212(a)(1)]. Unless a worker was actually trying to get injured, this guarding will prevent a worker from getting their fingers or hands caught between the belt and pulley as it is rotating. ensure that the guarding is installed; do not place hands in the area while machine is operating

choking up on tools and smashing fingers is very common This photograph shows a sledge hammer that has had the 6” closest to the head painted red. Smashed fingers due to choking up on the handles of hand tools is an all-too-common occurrence. Workers hands should not be placed on this section of the handle. To prevent choking up on hand tools and smashing fingers, workers must be careful not to choke up on hand tools, ensure correct hand placement, and place hands further back on handles. the first 6” of this handle is painted red to indicate that hands should not be placed there

this employee is using proper hand placement on a sledge

hands and fingers can get caught while maneuvering stands of pipe This photograph shows stands of pipe that are ready to become part of the drill string. Workers must maneuver these stands in and out of place during the tripping in and out phases. What are some techniques a worker can use to keep hands and fingers from getting pinched between stands of pipe while maneuvering them? See next slide for best answer to this question. what can a worker do to keep hands from getting pinched or crushed?

The next slide contains graphic content. this worker is using a tag line, keeping his hands free from crushing hazards This photograph shows a worker maneuvering a stand of pipe into position using a tag line. This will greatly increase control of the pipe and reduce the chance of slipping or tripping or mashing of fingers and hands. See the next slide for an example of what could happen when you are not careful. Warning! The next slide contains graphic content. when your hands get to the end of the tagline, there should be a knot for grip

here’s what could happen

This photograph was taken of a worker who was making some adjustments under the suspended load while double stacking trailers during rig setup. There should be no reason to be under a suspended load at any time! This worker can either do what needs to be done prior to the lift being made or use blocking to support the load in case it falls for any reason. Corrective Action: do what needs to be done before the load is suspended or use blocking

Your Employer Is Responsible For Providing appropriate PPE and other appropriate safety equipment Providing tag lines and tail ropes Ensure equipment is properly guarded Replacing tools that are worn or damaged

You Are Responsible For Wearing the appropriate PPE Operating and working around mobile equipment carefully, keeping in mind that such equipment has blind spots Using caution when working around potential struck-by or caught-between hazards

Case Study Because the company failed to do inspections, the crown sheave shaft came out of one of its mounts releasing the sheaves, the drilling line, and 165,000-pound drill-string. These components fell to the drilling floor killing two workers. The tie-back string/elevators were 4.9 feet above the rotary table. The string weight was 165, 000 lbs. At 18:50 hours, a loud noise was heard. The traveling assembly fell a short distance and got caught/trapped in the stands of pipe that were racked back in the derrick. The drill line parted in 4 different locations and dropped to the rig floor. The falling drill-string was the primary cause of the deaths and injuries. Ask the class for 3-4 things that may have contributed to these workers losing their lives. Possible Answers: Improper safety oversight. Defective equipment. Any others? As the class for 3-4 recommendations for preventing a similar incident. Possible Answers: Implement an active safety program. Inspect equipment frequently. Maintain rig. Limit time on the rig floor to only the time necessary to do your job. Any others?

Case Study A dump truck driver was attempting to repair a leaking brake line. When the hydraulics failed, the dump bed came down and pinned him to the chassis. He died from extensive internal bleeding shortly after EMS unpinned him. A 21-year-old dump-truck driver (the victim) died after being caught between the frame and dump body of a dump truck while performing routine lubrication. The victim was working for an excavation contractor at pad on the day of the incident. The victim's foreman drove by the area. He found the victim caught between the frame and dump body of the truck. The foreman called out for help and then called 911 from his cell phone. An excavator operator working nearby responded to the foreman's call for help and climbed into the cab of the truck and raised the bed. Emergency medical services (EMS) and law enforcement personnel responded within 10 minutes. EMS personnel transported the victim by ambulance to a local hospital where he was pronounced dead. Ask the class for 3-4 things that may have contributed to this worker hurting his back. Possible Answers: Worker under an elevated bed. A defective piece of equipment. Any others? As the class for 3-4 recommendations for preventing a similar incident. Possible Answers: Never work under an elevated piece of equipment. Always use the body prop. Any others?

Always Remember Secure or remove any loose equipment before setting up or breaking down a rig Be aware of and do not enter the swing radius of tongs and/or spinning chain Take damaged tools out of service Don’t choke up on tools Never work under a suspended load Ensure machine guarding is in place Never wear loose clothing

Memory Check How should a person on the ground control a suspended load being moved? use a pole with a hook on the end grab the rigging grab only the load use a tag line The correct answer is d. use a tag line.

Memory Check Which of the following is NOT a step in controlling pressurized lines? install whip checks match thread and size of connections test connection by running an extremely high pressure through the line ensure connections are not worn or damaged The correct answer is c. test connection by running an extremely high pressure through the line.

Memory Check How many seconds is it acceptable to stand under a suspended load? 1 2 3 The correct answer is a. 0. It is unacceptable at any time to place yourself under a suspended load.