Why confined space training?

why confined space training is important in sewers

Why confined space training? 

Why confined space training? Taking training courses before you enter, exit or work around a confined space has many benefits—The main benefit is having the knowledge to keep yourself and others safe.

Why is training to enter a confined space so important? What’s so deadly about a confined space that’s different from other types of dangerous, hazardous workplaces?

A lot, actually. 

We’ve talked about the dangers of confined spaces on the Hercules SLR blog before—But why should you train for them? You’re about to find out. 

In this blog, we’ll cover: 

  • What is confined space training? 
  • Why is confined space training important?
  • What are the OSHA/CCOHS standards for confined space training? 
  • How often is confined space training required?
  • What are the four main dangers of a confined space?  
  • Who can enter a confined space? 
  • Confined spaces & restricted spaces—What’s the difference?


Confined space training involves teaching workers who work in or around confined spaces the hazards, risks and dangers involved with them. It’s important that even people who aren’t planning to enter the space are trained on proper confined space entry and exit, since nearly 60% of confined space deaths happen to people who try to rescue others

Why confined space training? Read on. 


Why confined space training? Confined space training is important because it helps workers and nearby personnel manage risk associated with work in confined spaces, which in-turn, helps reduce injuries & fatalities. How can you know what to do, look for and how to rescue yourself and others if no one tells you? 

This is where confined space training comes in. 

Like we mention in the paragraph above, almost 60% of confined space deaths happen to people who try to rescue those who are trapped or in danger—But there are other reasons why training to work in or around a confined space is absolutely necessary. 

Many hazards found in confined spaces are found in other, open work spaces, but become more dangerous, or even deadly when you encounter them in confined spaces. 

This is because there’s little room for error for work in a confined space. Physical hazards are more dangerous in a confined space, materials & chemicals can interact unpredictably and of course, they’re harder to get in and out of. 

Some of these include: 

  • Low air quality: Low, or poor air quality might happen from a toxic substance in the air (see ‘Aspyxiant hazards’ below) or from a lack of oxygen, and/or natural ventilation. 
  • Asphyxiant hazards: These are gases that become concentrated in a confined space and displace oxygen in the air, which leads to nausea, convulsion, coma, and eventually, this atmosphere becomes fatal. Asphyxiants are gases like argon, nitrogen and/or carbon monoxide. 
  • Exposure to harmful chemicals.
  • Fire hazards, like chemicals that could ignite if a spark is used in the space.
  • Physical hazards like noise, extreme heat or cold, radiation, vehicle & pedestrian traffic and even poor visibility. 

All of these hazards are amplified when you work in a confined space. We can’t stress the speed at which these hazards become fatal. Picture this:

You’re working on a water waste lift station (which controls waste water/sewage travel). Your co-worker has descended into a confined space to diagnose an issue, but the diagnosis should have been complete long ago—As in 45 minutes ago. « I’m gonna go check on him, » your co-worker shouts to you. Before you can tell him to stop, he enters the confined space. You call 911—Neither can be revived. Your co-worker who simply went to check on someone died instantly. You will never underestimate just how fast a confined space can take a life again. 

We don’t mean to be obscene, but this is a reality than unfortunately, happens more than it should, even with all  the knowledge available on confined space entry & exit. Hazards found in typical workplaces become much more hazardous when they’re confined, which is just one reason why confined space training is so important. 


In Canada, provincial standards regarding confined space differ. Your organization may have also have requirements for confined space work specific to them, so take these as a general guideline.

There is some legislation that involves training and confined spaces in Canada—The Canadian Occupational Health & Safety Standard 11.5 on emergency procedures says:

  1. Where conditions in a confined space or the nature of the work to be performed in a confined space is such that the specifications set out in paragraph 1.4(1)(a) cannot be compiled with during all times that a person is in the confined space, the employer shall 

a) In consultation with the work place committee or the health and safety representative, establish emergency procedures to be followed in the event of an accident or other emergency in or near the confined space, which procedures shall specify the date on which they are established and provide for the immediate evacuation of the confined space when

i) an alarm is activated, or

ii) there is any significant change in a concentration or percentage referred to in paragraph 11.4(1)(a) that would adversely affect the health or safety of a person in the confined space.

b) provide the protection equipment referred to in paragraphs 11.3(b), (c) and (d) for each person who is about to enter the confined space;

c) Ensure that a qualified person trained in the entry and emergency procedures established pursuant to paragraph 11.3(a) and paragraph (a) is 

i) in attendance outside the confined space, and 

ii) in communication with the person inside the confined space; 

d) Provide the qualified person referred to in paragraph (c) with a suitable alarm device for summoning assistance; and 

e) Ensure that two or more persons are in the immediate vicinity of the confined space to assist in the event of an accident or other emergency. 

2. One of the persons referred to in paragraph (1)(e) shall 

a) Is attached to a secure anchor outside the confined space,

b) be the holder of a basic first aid certificate; and 

c) be provided with the protection equipment and emergency equipment referred to in paragraph 11.3(d). 

3. The employer shall ensure that every person entering, exiting, or occupying a confined space referred to in subsection (1) wears an appropriate safety harness that is securely attached to a lifeline that

a) is attached to a secure anchor outside the confined space;

b) is controlled by the qualified person referred to in paragraph (1)(c);

c) protects the person from the hazard for which it is provided and does not itself create a hazard; and 

d) is, where reasonably practicable, equipped with a mechanical lifting device. 


Anyone who is about to work in or around confined spaces should receive training—It’s often beneficial to train new employees on specific confined space entry, exit and rescue procedures for your organization even if they have training from previous work, since practices may be different. 

Confined space training should also be held when policies or regulations change. Training should also be held if policies and procedures are ignored. As we know, this can be deadly. 

The Canadian Occupational Health & Safety Standard 11.11 states: 

  1. The employer shall provide every employee who is likely to enter a confined space with instruction and training in,

a) the procedures established pursuant to paragraphs 11.3(a) and 11.5(1)(a); and

b) The use of the protection equipment referred to in paragraphs 11.3(b), (c) and (d).

2. The employer shall ensure that no person enters a confined space unless the person is instructed in,

a) the procedures to be followed in accordance with paragraphs 11.3(a) and 11.5(1)(a); and

b) The use of the protection equipment referred to in paragraphs 11.3(b), (c) and (d).


We’ve covered some of the main hazards to look for in a confined space, but as we know, they are magnified in a confined space—So it’s worth going over again.  

The four main dangers of work in a confined space are: 4 main confined space hazards


It’s easy to think of confined spaces as work spaces that you descend (go down) to, but confined spaces can be nearly anywhere, above or below ground.

So, why confined space training? Because it’s likely many workers in industrial jobs will work in one of these spaces at least once. 

By definition, a confined space:

  • Is not meant to be occupied by humans (Especially long-term)
  • Has limited entries and/or exits, or a layout that could hinder emergency responders, or movement from humans or machines. 
  • Represents a risk to health & safety because of:
    • The design, construction, location or atmosphere of the space
    • Materials or substances found/used in the space
    • Any other conditions that contribute to safety risk or hazards. 

Types of confined spaces include: 

  • Sub-cellars
  • Tanks
  • Culverts
  • Silos
  • Vaults
  • Open Ditch  

why confined space training is important





























INFO@HERCULESSLR.COM  1 (877) 461-4876


Hercules SLR is part of Hercules Group of Companies, with locations and unique businesses coast-to-coast. We provide securing, lifting and rigging services for sectors in Canada and Internationally. Hercules SLR serves the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

We have the ability to provide any hoisting solution your business or project will need. Call us today for more information. 1-877-461-4876 or email info@herculesslr.com

Fall Protection Safety: What’s your IQ?

fall protection safety quiz hercules securing, lifting and rigging

Think you know how to stay safe at heights? Maybe you’ve read our fall protection glossary and think you’re an expert? Now’s your time to prove it—Take our fall protection safety quiz and find out if you have a high IQ, or if you have a little more training to do. 

Think you have what it takes? Find out below! 



How many injuries occur each year in Canada due to dropped objects?

Correct! Wrong!

Over 27,000 injuries occur due to falling objects each year in Canada—These are just the reported incidents.

True or false? You only need fall protection equipment if you're working at exceptional heights, like on a bridge or skyscraper.

Correct! Wrong!

Fall protection equipment, particularly fall protection for tools is required for work at heights of 3-metres or more.

The term 'arresting force' means:

Correct! Wrong!

Arresting force means the force transferred to the body when a fall is arrested—this is also known as fall arrest force. You can reduce arresting force by using energy absorbers if your lanyard could injure you.

Safety harnesses should always be tried on before purchasing

Correct! Wrong!

You should always try on your safety harness before you purchase. It should fit well, be comfortable and meet provincial regulations.

A safety harness is still safe to use if the webbing is torn a little bit, as long as it's not around the D-ring.

Correct! Wrong!

Webbing varies from harness to harness, however, make sure to choose a harness with sturdily-constructed webbing—If the harness has any burns, tears, holes or frayed webbing. The material should slide through hardware without catching/snagging. If it does, take your harness out of service. Safety harnesses are meant to be used in

How should padding on your safety harness fit?

Correct! Wrong!

Like you probably learned from earlier questions, comfort is important when it comes to fall protection equipment. Padding on a safety harness should be easy to handle, pliable and easily adjustable. Padding must also be able to withstand harsh weather and corrosive conditions, so it's important to select padding that's both breathable and durable.

ALL safety harnesses should come with instructions for best-use.

Correct! Wrong!

Thought it might sound common-sense, all safety harnesses should include tips for applications, instructions and guidelines for using accessories and hardware. Be sure it meets CSA guidelines for your intended application.

How many CSA classifications are there for full-body harnesses?

Correct! Wrong!

There are 5 CSA (Canadian Standards Association) standards for full-body harnesses. These are: Class A, Class AD Suspension and Controlled Descent, Class AE Limited Access, Class AL Ladder Climbing and Class AP Work Positioning.

Items only usually fall from heights when they're unsecured.

Correct! Wrong!

Tools and other items are dropped from heights for a number of reasons—While inadequately-stored or secured tools are the third leading cause of dropped tools from heights, inadequate risk assessment and human factors (poor behaviour, complacency) are the top 2 causes.

Nobody actually dies from falling at work

Correct! Wrong!

VERY false—Over 14,000 Canadian workers are injured each year from falls, and over 40 each year are killed from falls at heights.

What's your Fall Protection Safety IQ?
50%—You've got some work to do!
You're halfway there, but you've got some work to do—Hopefully you're not planning to work at heights anytime soon!
0-10%—Yikes, please don't work at heights anytime soon.
You're not quite there—At all. If you work at heights, we recommend taking some fall protection training to learn more.
20-40%—Close, but no cigar.
You know a small bit, but your fall protection I.Q. isn't what it should be yet—Especially if you're working with or around people at heights.
60-70%—Hey, that's pretty good!
Your fall protection I.Q. is high, but it could be better. Have you ever considered taking some more training? To brush up your fall protection knowledge, check out our fall protection blogs for more info.
80-90%—You're almost a fall protection genius.
You're pretty much there. A little brushing up on your fall protection knowledge and you'll be a fall protection genius in no-time.
100%—You're fall protection I.Q. is off the charts!
You're a fall protection genius—You answered them all correctly. Where do we sign up to take your training course?

Share your Results:


Fall protection is not a waste of time—It’s often seen as a burden, but safety equipment exists to help workers, not hurt them. The right fall protection PPE lets you go home safely each day.

You have the right to stay alive at work—Which is worth it, if you ask us.  

To learn more about fall protection and what you need to stay safe, book a free fall protection demo with your local Hercules SLR branch. They’ll show you how harnesses, SRL’s and tool fall prevention equipment works, how it feels and what is best for you. 












Hercules SLR is part of the Hercules Group of Companies. We have a unique portfolio of businesses nationally, with locations coast-to-coast. Hercules Group of Companies provides extensive coverage of products and services that support a variety of sectors across Canada which includes the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, mining and marine industries. 

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

We have the ability to provide any hoisting solution your business or project will need. Call us today for more information. 1-877-461-4876 or email info@herculesslr.com. Don’t forget to follow us on FacebookTwitter, LinkedIn and YouTube for more news and upcoming events.

Confined Space Rescue & Retrieval: Guest Blog from 3M

3m confined space rescue from hercules slr

Incidents that prevent workers from self-rescue can occur in confined spaces due to ill-conceived attempts to rescue and retrieve others, but planning for a rescue can help prevent tragic results.

Proper rescue and retrieval plans aren’t often created for confined spaces – over 100 deaths occur annually inside confined spaces in the United States according to the Bureau of Labor and Statistics1. In almost all of these incidents, investigations reveal no rescue plans were in place. Before entry or work begins, OSHA requires you have a defined and documented rescue and retrieval plan that’s specific to your confined space – whether a tunnel, storage tank, manhole, elevator shaft, reaction vessel, ductwork or even wastewater treatment facility.

But a detailed rescue and retrieval plan is only one critical step of preparation (one of the four elements 3M talks about here). Rescue and retrieval needs to be performed by a competent person, who’s completed proper training. They must also understand how to select, wear and use appropriate personal protective equipment (PPE) and other tools or equipment that will be needed.


There are many aspects of a robust rescue plan, but at minimum the rescue plan should include:

  • The location of the confined space and the job being conducted inside;
  • Identify the rescuer, competent person to be on hand, emergency contact and methods to keep in contact with those in the confined space and anyone involved if a rescue becomes necessary;
  • Layout all pre-work tasks;
  • Catalog all the rescue equipment available for use and where they can be located – include a checklist for thorough inspection that evaluates if it’s in good working order;
  • List all the critical rescue factors, include any hazards present;
  • Record the response procedure, include how to:
    • notify the emergency contact
    • make a medical assessment of the person stuck inside
    • if possible, how to have the trapped employee perform a self-rescue, or other crucial steps if that’s not possible.

You can model your emergency response plan after the NFPA 350 best practice guide. Determine appropriate means for rescue before the start of any confined space entry activities. The procedures set up at your work or job site for emergency rescue for each specific confined space should to be suitable and sufficient.

The detailed rescue plan should be documented, reviewed and in place before anyone attempts to enter or begins work in a confined space. The rescue plan for each confined space should be reviewed by all involved in the entry each time the space is going to be entered, just like a hazard assessment should be conducted before entry into a confined space. These plans should be practiced as part of training so everyone knows what to do if a rescue/retrieval situation does arise.

No plan in place to enter a confined space? You should speak up, and not enter the confined space without a plan in place for how to react if a rescue and retrieval becomes necessary.


Before any access is granted to a confined space, you should evaluate the needs of a rescue team and what training is required for the team (or individual) to perform a rescue operation. Tailor training to specific roles required – you should include:

  • Confined space competent person who is responsible for the evaluation of confined spaces on the job site
  • Confined space supervisor who approves the work inside that’s being done
  • Confined space attendant and entrant for those who are responsible for the work inside
  • Confined space entry rescuer who may have to enter and assist in a rescue/retrieval

All confined space rescuers, per the requirements of OSHA general industry and construction regulations are required to receive annual refresher training. This must include utilizing similar spaces and techniques anticipated at the job site.

You’ll find, rescue training covers a wide range of information related to hazardous conditions and all types of rescue equipment. Rescuers will also require training to prepare for tasks involved with accessing confined spaces, such as descent control, secondary systems, patient packaging methods, dismantling techniques, proper storage of equipment, selection, and use of suitable anchors, as well as the common hazards that pertain to the system and components.

For rescues requiring entry:

  • All members of the team must be specially trained in confined space rescue work
  • The team must have at least one member certified in CPR and first aid
  • All members of the team must be trained in the techniques and equipment for specific confined spaces
  • The members who are going to assist with the rescue should be well-versed in the rescue plan for that confined space and review both the risk and hazard assessments that have been conducted for that specific space

According to current U.S. regulations and industry standards, an identified rescuer, whether in-house or an outside rescue service is used, must have the ability to respond to a permit space rescue request in a timely manner, considering the hazards identified.


There are different types of rescue/retrievals that can be conducted, depending on the situation you and your team are facing.


Self-rescue is exactly what it sounds like. This is when you can rescue yourself with your own means and you can use equipment that is suited for self-rescue that will allow you to climb out of the space safely. Self-rescue requires the entrant to stop what they are doing and safely exit the space as quickly as possible.

Self-rescue should be implemented whenever an entrant or attendant determines there is a problem within the space. This may include a potentially hazardous change in atmospheric conditions within the space or when signs or symptoms of an exposure are noted. Self-rescue may also occur if the entrant realizes that PPE is faulty, communication with the attendant is severed, or some other hazard presents itself that may put the entrant in danger.


If self-rescue is not an option, the next consideration should be if a non-entry rescue can be carried out. Non-entry rescue occurs when a worker outside the space does not have to enter to help a worker exit a confined space safely. This type of rescue often requires an attendant or non-entry rescue team. A non-entry retrieval option is required at all times unless the retrieval equipment would increase the risk to the worker or not contribute to the rescue.

The person or people helping the worker out of the confined space will often require the use of a retrieval system comprised of the following components:

  1. Anchor systems such as a davit, pole hoist or tripod
  2. Body harness, worn by the entrant
  3. Connection devices such as a winch or retrieval SRL

This type of rescue is only effective in simple vertical or horizontal spaces. The opening must be able to accommodate the anchor system, and the surface around the opening must support the weight of it in addition to the attached entrant. If the entrant is injured or cannot perform a self-rescue, the attendant can remove the entrant using the retrieval system. This is where a retrieval system with a mechanical advantage becomes very helpful.

If neither self-rescue or non-entry rescue is possible, an entry rescue will be required. If you have a properly trained rescue and retrieval team, they will need to be called upon to help perform getting the entrants out.


An entry rescue is required when someone cannot get out on their own and requires not just a team on the outside to assist, but someone who will enter the space to assist any entrants who cannot exit the space on their own. These teams can be comprised of company personnel, including externally hired services or a local emergency response team. Because there needs to be a prompt response in these situations, OSHA specifically addresses the requirements of the entrant’s employer to fully evaluate the capabilities of these rescue teams.


Once a rescue is complete, it is important to review how the rescue went and what can be learned from the experience. Do changes need to be made to the rescue plan if the confined space is going to be accessed in the future? Does your PPE need to be checked and should any of it be decommissioned and different or should new PPE ordered?


As part of a rescue plan and the hazard assessment conducted for each confined space entry, make sure you have identified what PPE and other equipment, such as air monitoring/gas detection instruments, are needed. Also, be sure everything is available in stock on the premises, the location is known, the equipment is clean and is in good working order before commencing any access work.

When it comes to considering the equipment for a rescue start with understanding the ABC’s of confined space:

  • Anchorage systems such as davits, pole hoists, tripods
  • Body support, which means full body harnesses, and in some cases, boatswain (bosun) chairs
  • Connecting devices such as self-retracting lifelines and retrievals
  • Detection for air monitoring of gases, vapors, particulates, fumes and other hazardous substances
  • Education courses that help teach proper techniques
  • Full body coverage for employees who should be protected from head to toe based on hazards identified in the risk assessment, including hard hats, safety glasses, hearing protection, advanced communication devices, respiratory protection, clothing that protects the body against chemicals, fires and other hazards such as coveralls, as well as gloves and safety shoes that protect the hands and feet


Proactively identifying a proper rescue plan, seeking out appropriate training and identifying the right equipment long before any rescue is ever attempted is crucial. You must be prepared so if you’re faced with saving someone who’s stuck, has collapsed, or has ceased to respond from inside a confined space, you are ready for the situation.

3M knows there’s a lot to consider when it comes to planning for, working in and rescuing someone from inside a confined space. Explore resources available at 3m.com/confinedspace.

ORIGINAL ARTICLE REPRINTED WITH PERMISSION VIA 3Mconfined space rescue 3m from hercules slr

Incidents that prevent workers from self-rescue can occur in confined spaces due to ill-conceived attempts to rescue and retrieve others, but planning for a rescue can help prevent tragic results.

Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

We have the ability to provide any solution your business or project will need. Call us today for more information. 1-877-461-4876. Don’t forget to follow us on FacebookTwitter and LinkedIn for more news and upcoming events.

  1. https://www.bls.gov/iif/oshwc/cfoi/cfch0015.pdf

Stuck in a Tight Spot? what to know in a confined space

confined space, hercules slr, how to work in confined spaces

Most workers will have to work in a confined space at some point in their career – although common, many workers and employers don’t plan or account for common hazards found in them. 

Read on to discover commonly-found dangers in confined spaces and how to prepare for them. 


A confined space is an area that:

  • Is large enough to enter and do work in;
  • Has limited entries and exits;
  • Isn’t meant for long-term human occupancy.
  • Examples: Silos’, tunnels, sewers, wells, underground utility vaults, an empty tanker trailer


Yes, it’s a confined space that you need a permit to enter – but a permit-required confined space also:

  • Contains or has the potential to contain serious safety or health hazards like:
    • Engulfment
    • Toxic Atmosphere
    • Puzzling Configuration
    • Heat or Cold Stress
    • Slipping Hazards
    • Flammable Atmosphere
    • Oxygen Deficiency


  1.  Failure to see and control hazards associated with the confined space
    • Atmospheric hazards
    • Physical hazards
  2. Poor Emergency response time or plan
    • Many injuries or fatalities in confined spaces occur when other workers attempt to save coworkers injured in a confined space
    • Nearly 60% of worker fatalities occur when trying to save someone else from a confined space hazard 

Nearly 60% of deaths in confined spaces happen to the would-be rescuer


Hazard #1: Oxygen Deficiency

Normal air has an oxygen content of 20.8-.9% – when there’s less than 19.5% available, you’re in a oxygen-deficient space. When this level decreases, even by 1-2% the effects are felt immediately. When working in a space with this level, remember to wear a self-contained breathing apparatus (SCBA). 

What leads to oxygen deficiency? Inadequate ventilation, poor air quality, oxygen consumed from welding, decomposition, rust are some of the factors that cause oxygen levels to drop.

Oxygen Deficiency Levels

  • Minimum for safe entry: 19.5%
  • Impaired judgement and breathing, accelerated heartbeat: 16%
  • Faulty judgement and rapid fatigue: 14%
  • Nausea, vomiting, inability to perform simple tasks, unconsciousness: 6-10%
  • Rapid loss of consciousness, death in minutes: Less than 6%
Hazard #2: Oxygen Displacement

Oxygen displacement occurs when there’s an inert gas (it’s worth noting inert gas is different than a noble gas – an inert gas doesn’t chemically react, and a noble gas does chemically react under certain conditions. All noble gases are inert, but not all inert gases are noble).

When enough of a inert gas is in a confined space, it displaces the oxygen which makes it difficult – well, impossible to breathe. For example, nitrogen is non-toxic, colourless and odourless – but will displace the oxygen in a room.

Hazard #3: Fire & Flammable Atmosphere

Flammable atmospheres are caused by flammable liquids, gases and combustible dusts which if lit, can cause an explosion or fire. The ignition doesn’t have to be a flame – it can be something as simple as static electricity or a small spark.

Hazard #4: Physical

You can become engulfed after being trapped or enveloped by material. Electrocution can happen when electrical equipment is activated, and mechanical energy can activate and cause physical injury. 

Other physical safety hazards, although small that can still cause injury are inadequate lighting, noise, vibration and radiation. Nearby traffic, vehicles and other heavy machinery could also be a hazard. Objects and slippery areas pose falling hazards, and hot or cold temperature extremes also pose a threat. Extremely high temperatures can cause your body to undergo heat stress. 

Heat Stress Symptoms

In a confined space (and other areas) your body might not be able to cool down which can cause heat exhaustion or heat stroke to occur.

Heat exhaustion symptoms include:

  • Headache
  • Dizziness
  • Weakness
  • Confusion
  • Vomiting
  • Fainting
  • Pale, clammy skin

When these symptoms occur, you should move to a cool area, raise your legs, take off any heavy clothing, drink water and apply a wet cloth to your skin. 

Heat stroke symptoms include:

  • Dry, pale skin – with no sweat
  • Hot, red skin that looks sunburnt
  • Unable to think straight, seizure, unconsciousness

When this occurs:

  • Call 911
  • Move victim to a cool area
  • Loosen or remove heavy clothing
  • Place icepacks at your armpit and groin

To protect yourself:

  • Try to work or accomplish physical parts of work during the coolest parts of the day
  • Use spot ventilation
  • Use buddy system
  • Drink cold water – try to drink around every 15 minutes and take frequent breaks
  • Avoid alcohol and caffeine in high temperatures, and be mindful of medication as this can increase your risk of heat  stroke.

confined space, hercules slr, srl, self-retracting lifeline, inspections, repairs











Before you start work in a confined space, it’s essential to follow a procedure to control and/or minimize safety hazards and remain safe on the job. Follow this procedure before working in a confined space:

  • Conduct a pre-entry evaluation (like a discussion with everyone who will be working at the site);
  • Identify and eliminate potential hazards that can enter the space, both atmospheric and physical;
  • Use forced air ventilation and use lock out/tag out if necessary;
  • Complete an entry permit – Assign an entrant, attendant and supervisor and any other relevant competent person needed on the site.

The Authorized Entrant will:

  • Know hazards that will face workers during entry;
  • Wear proper PPE;
  • Maintain communication with the attendant;
  • Know the signs of overexposure/heat stress and stroke;
  • Evacuate the confined space when ordered to or when over-exposed to hazard(s).

The Authorized Attendant will:

  • Keep their position outside the entrance at all time;
  • Know the signs and symptoms of overexposure;
  • Prevent unauthorized people from entering the space;
  • Maintain communication with entrants;
  • Begin the emergency response/rescue plan if needed;
  • Complete an evaluation of the entrance before they start work;
  • Make sure personnel know the hazards;
  • Implement any necessary control measures, for example – ventilation;
  • Complete any permits that are necessary to enter the space;
  • Complete any tests needed to enter the confined space safely.

One of the most important parts of starting work in a confined space is to ensure you have necessary retrieval equipment for entry, exit and emergency rescue situations.

As we mentioned, almost 60% of confined space deaths happen to someone trying to rescue a coworker – It’s natural to want to save a life, but it’s important that you’re not part of the death count—This makes confined space planning essential to complete work that’s both efficient and safe. 

Choosing and having the proper PPE for the job is essential to staying safe amidst hazards in a confined space. This may include self-retracting lifelines, anchorages or body harness’ – click the link below to find out more about Hercules SLR’s fall protection services. 

Fall Protection

Check out our blogs to learn more about fall protection and staying safe at heights: 

Sources: Canadian Centre for Occupational Health - https://www.ccohs.ca/oshanswers/hsprograms/confinedspace_intro.html 

Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

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Confined Spaces: Hercules’ Safety Tips

confined spaces safety training from hercules slr

What is a Confined Space?

Confined spaces are present in nearly every industrial trade, and most workers will encounter at least one confined space during their career.

The OSHA states that nearly 90 deaths occur per year, across a range of industries involving confined spaces. Almost 2/3 of these fatalities are caused during an attempt to rescue someone in a confined space—having an efficient, established retrieval plan in place is essential to preventing death and injury.

A confined space is defined as a entirely or considerably enclosed space, where dangerous conditions are present due to lack of oxygen or hazardous substances.

What else constitutes a confined space? A space which is large enough for a person to enter or exit, has limited or restricted exits and isn’t designed for extended human occupancy. A confined space may have more than one opening, however—if a worker must climb through various obstacles to access the opening, this may be considered a confined space as well.

Confined spaces also may temporarily appear on a work site through construction, fabrication or modification. Tunnels, manholes and silos are all examples of confined spaces.

What is a Permit-Required Confined Space?

Not only are permit-required confined spaces difficult to enter, they present serious hazards like inadequate ventilation or noxious air. These include:

  • Hazardous atmosphere or potential for one;
  • Material, like grain that could engulf an individual;
  • Walls converging inwards, or floors sloping downward and tapering into a smaller area that could trap or asphyxiate an individual;
  • Any other recognized hazards, like unguarded machinery, heat stress, or a fall hazard.

These confined spaces present a great threat as they’re more likely to cause fatalities—a quick and simple exit, or rescue must be possible for workers in confined spaces. The safest rescue strategies involve no additional employees entering the space—retrieval equipment should be used unless unsafe to do so.

Confined Space Training


What Makes Confined Spaces Dangerous, Anyway?

Not only are confined spaces difficult to enter, exit and navigate, they present a series of other dangerous threats many workers may overlook. Dangers commonly present themselves when welding, painting, flame cutting or using chemicals in a confined space. Other risks include:

  • Lack of oxygen;
  • Poisonous gas, fume or vapour;
  • Liquids and solids suddenly filling the confined space, gas releasing in the space when disturbed;
  • Fire and explosions;
  • Residues left behind that give off gas, fume or vapour;
  • Hot working conditions;
  • Falling objects;
  • Moving parts of equipment or machinery;
  • Electrical shock resulting from defective extension cords, welding cables, etc.;
  • Poor visibility;
  • Materials travelling through piping like gases, hot substances or water.

Fall-Prevention Training is Essential for Safety in Confined Spaces confined-spaces-fall-prevention

As previously mentioned, having an established and efficient rescue plan for workers’ in confined spaces is essential. Fall protection, or prevention training is another not only important, but essential step to ensure safety.

There are five main steps to consider when safeguarding a confined space:

  1. Guard the entrance: A guardrail, barrier or another temporary cover must be in place to prevent entry (i.e. an accidental fall) into the space.
  2. Wear fall-protection gear: All workers, even those not working in the space should have proper fall-protection gear. Dangerous factors may affect nearby workers, like fumes. Equipment like Restraint Lanyards that stop an appropriate distance from the confined space should be used by other workers.
  3. Make sure vertical access is safe: Typically, a ladder or a davit arm with a winching mechanism is used to safely access the confined space.
  4. Use fall-arrest equipment: The main components of fall protection for a confined space are an anchorage, body support and a connector. Workers should have a backup for their primary entry and exit source. If using a ladder for example, the worker should also have a retractable lifeline and a winching mechanism, or may have a safety harness with a retractable winching mechanism to lower, and raise workers into the confined space. Equipment will depend on a vertical or horizontal entry.
  5. Training: If a workers is unfamiliar with fall-protection equipment, the term itself or has no recorded instances of fall-protection or prevention training, the employee must be trained to inspect and use fall-protection equipment and know general information regarding fall-protection.

Find fall-arrest equipment, and more safety solutions for working in confined spaces at Hercules SLR. Click here to read more on how to select the best fall-protection equipment for confined spaces.

Original Article: http://www.capitalsafety.com/en-us/Documents/New-OSHA-Rescue-Requirements-for-Confined-Space-Retrieval-Firl-Argudin-OHS-November-2015.pdf


Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.