This short article covers the pump lifting chain. Including why and also where they are used together with their benefits.
To begin with allow us to clarify what a pump lifting chain actually is.
Pump lifting chains or pump chains are manufactured with the single function of retrieving submersible pumps out of their often extremely deep down, wet location.
What is a submersible pump utilised for?
A submersible pump can be located in several locations which are flooded with some form of liquid, such as water or slurry. They are used to pump out that liquid. They are often utilised in water treatment and sewage areas, or maybe bore holes, mines and drilling rigs, even in ancient wells, the truth is they can be used anywhere water removal is necessary, from often inaccessible places.
Anywhere a submersible pump is used, whether or not it will be temporary or more permanent they are going to require something to pick up and lower them into position, this is where the pump chain comes into its own, seeing that they are the only true solution.
Why are pump chains required?
The speciality of a pump chain is the fact that it incorporates a master link every metre, to allow it to be hooked onto the hoisting device in short increments so that a big gantry system or crane will not be required as these usually are impossible to use.
This type of pump is generally left in position until it either requires repairing, cleaning or removing entirely as it is no longer needed. The pump chain is left attached to the pump whilst is place and the top link left just under the cover (i.e. man hole) in order that it may be located easily ready for retrieval. This pump chain will then be hooked to a hoisting device on a tripod style framework above the hole. Tripod systems are mainly utilised as they are easier to fit together on site, where as a large crane or gantry wouldn’t be possible to transport to most locations. However a tripod won’t give you the appropriate lifting height required to lift the pump in a single manoeuvre. So how does it all work? The initial master link on the pump chain is fitted to the hoisting apparatus, this is subsequently elevated to usually when the 3rd big link is level with the top of the hole, then a pole/bar is passed all the way through the link and supported over the hole itself, this will provide you with some slack on the top master link, which means you can easily remove it from the hoist. The hoist will subsequently be lowered back down to the next link, (just above the 3rd link with the bar through) the bar is detached and then the hoist is raised a little more, this process continues until the pump can be accessed or removed. It really is a slow procedure however it is the only process that works successfully.
The chain used to lift these submersed pumps has to be robust enough to maintain their power in what are usually incredibly wet or dirty conditions or else both. Stainless-steel is almost certainly the most popular choice because of its resilience in hostile environments, grade 80 or 316 stainless steel is used to produce these, although they may also be found in grade 40 high tensile steel. Length isn’t usually a difficulty seeing that they can be made up to suit you; they are available in a variety of chain link sizes from 4mm to approximately 26mm. Shackles and other fixings are available in stainless steel too, to supply a resilient anchor point from the chain to the pump.
To promptly summarise then, it is most obvious that the use of a pump lifting chain is crucial to raising and lowering under water pumps. The places that they are normally used are often deep, dark and narrow so therefore it would be either not possible or extremely dangerous for an individual to go to the bottom to retrieve the pump. Always buy top quality products from reputable suppliers to avoid losing the chain as a result of breakage or degradation due to inferior quality chain. This would make the retrieval of the pump nigh on impossible, or at the very least immensely difficult.
Overloading lifting machines is very hazardous and comes about when the weight of the load exceeds the lifting capacity of the device. This can not just take your appliance out of action but cause severe injury. Determining the actual weight of the load is rarely easy, particularly when there is a great deal of deviation in the kind and weight of the loads, but by utilizing a crane scale it will be.
Next we are going to examine what a crane scale actually is.
Crane scales are exactly what their name implies; they fix to a crane or other lifting device in order that they may weigh the load to be lifted in order to be sure the crane and/or lifting device is up to safely lifting the load, if it’s not then you are able to upgrade your equipment appropriately to facilitate a safe lift without the chance of overloading. It is imperative to continuously keep under the safe working load lifting capacity of the piece of equipment.
You will find a variety of crane scales on offer with differing properties thus are going to be more suited to some tasks than others. The majority of scales will contain controls to measure various units, such as tare; peak weight, totals, tolerance control , Kb’s; Lbs and Kn’s and percentage weight. Most models possess an LCD display screen making the data easy to read. The majority also include remote control for easy reading and control from up to 150 meters away. There are even versions available which incorporate bluetooth and wi-fi technology for wireless connections to computers etc; and some models have attached printers to provide instantaneous hard copies of the information.
Do you employ a tripod for lifting, or else work where headroom can be a little restricted, then there is a a number of crane scale suitable for you too, owing to their often compact quality to deliver the least possible distance in-between the top and bottom hooks or shackles. Dark foundries will benefit from the extra heavy duty version because it can be utilised in higher temperatures and is also easily readable owing to its bright display window.
If you have ever been to a ship yard or working dock side then you have probably observed a crane scale seeing that this is where they are mostly used. Ship/dock yards repeatedly need to lift containers on and off ships, these containers come in a range of sizes and more importantly can vary significantly in weight, by utilizing a scale the weight of each shipment can be ascertained so the crane/lifting device should never be susceptible to overloading since the lifting capacity of the crane should always be known.
Crane scales are simple to attach to your lifting device and are easy to use, even from a decent distance due to the remote controller. Lifting differing types of objects with no idea of their precise weight can cause overload and consequently device failures, not to mention the possibility of accidents. In the event you were to use a crane scale, on the other hand, injury hazards and product failures can be kept to a minimum, this can save time (if your appliance is out of action due to damage from overloading) and money (from expensive repair work or even replacements). So in conclusion the crane scale offers extra safety and cost effectiveness.
There is little doubt that the majority of builders and workers in the construction business will use some type of lifting gear to assist the construction process. There are numerous types of equipment that will go well with particular tasks in this industrial area, and this article is designed to briefly highlight the most effective and most often utilised equipment in construction nowadays.
If you work somewhere inside the construction/building industry, odds are you have to work up at high levels from time to time; this brings us to our first and probably the mostly utilised piece of apparatus ever; the safety harness. Obtainable in several versions to suit varying purposes, but several packages can be found specifically for builders, scaffolders and construction workers. Then it needs to be decided upon whether or not you would be better with a fall restraint system to avoid falls initially, yet are more restrictive of your movements, or would a fall arrest system suit you better as they enable a lot more freedom although will not prevent you from falling, but they will catch you in the event you do.
A scaffold hoist, which is electrically powered is not only a very popular piece of equipment for construction workers, but is also cost effective, safer and quicker to use than man-power alone. The small jib arm which is attached to the hoist and then to a scaffold pole, allows for the hoist to be rotated out over the edge of the platform to lift up the materials required. Mortar buckets and wheelbarrow chains improve the hoist all the more enabling them to be raised to their chosen position, even full loaded. Using a scaffold hoist can save much time on a building task and therefore money too.
Gantry hoists are also used together with a gantry framework system, which has weighted ballast boxes at the rear enabling the hoist to hang over the edge of the operational area; they are free-standing and not attached to a scaffold pole.
The above are the most frequently used lifting gear in construction, however there are many further equipment regularly utilised as well. Other types of hoists may be seen in large construction areas, for example, an electric hoist, ratchet lever hoist or perhaps a manual chain hoist/chain block, most of which need to be fitted to a suitable fixing point by means of their top suspension hooks so the hoist may be used to raise and lower objects. Each kind of hoist has various models with a range of capacities and characteristics available to suit different purposes.
These other forms of hoists will require an appropriate and secure position from where to hang them from, steel beams are the best as they can be fitted with a fixed beam clamp to suspend the hoist from, or else better still a beam trolley, that can travel along the beam with the hoist to wherever needed, these can be manual or powered.
You will find various types of slings available to further aid lifting loads on the building site; a sling either wraps around or attaches to the load and then hooked into the lifting device (i.e. a scaffold hoist); chain slings are extremely popular within construction because they are very robust, and with the wide range of models available that may be utilised in numerous hitch types, there’s something suitable for most kinds of loads; however the softer web type slings are perfect for objects that happen to be more delicate or easily marked.
A further regularly used device in the building industry is the mobile gantry crane; these not only offer a beam from where to suspend your lifting device, they can be made to measure and can endure lifting heavy loads, their greatest benefit has to be their mobility, and the fact that they can easily be pushed around the construction site to wherever they may be required, as long as the ground is firm and relatively level, though adjustable parking jacks may be attached to help to balance the gantry on slightly un-even ground.
To conclude then, it is clear that a wide variety of lifting gear is on the market to suit builders and construction workers. Their key advantage has to be the speed at which they are going to lift a load when comparing with manpower alone, this in turn saves time and so capital. Safety is the other greatest asset, when using appropriate lifting equipment, saving manpower, and minimising the risk of accidents and injuries to the workers, who will no longer have to haul heavy items thus reducing the strain on their bodies.
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There are more than 200 different types of eyebolts, most are for bolting to a specific surface, though some are created for welding on to the surface to create an anchor point for lifting and lashing appliances; also falling into this group are eye nuts and bow nuts which screw onto a threaded bolt and so more easily removable; you can also get eyebolts that are fixed and some which swivel, some models boast full rotation with an additional load ring pivoting point; there are various shaped eyebolts, like round, oval, and star shaped all which suit particular functions. Some eyebolts include relief lugs which provide two or four bolts, and therefore additional safety. Also obtainable are eyebolts which encompass a hook with safety catch for attaching rings and slings etc.
It’s very important to select your suspension points vigilantly, this is to eradicate the need for extra additions and manipulations to get your sling to fit correctly which can be a very insecure method, often heavy plates are utilised that are not intended for a potential inclined load, or they have been over dimensioned so that hooks that have a small width or shackles cannot be attached. This can be extra costly and also time consuming; and so ideally choose one which will go with all the sling varieties that you utilize, for example; wire rope slings, chain slings, webbing slings and hook assemblies. Make sure you also choose an eyebolt with a suitable lifting capacity for the lifts intended. Additionally it is prudent to note that certain types are intended for in-line lifting only, such as the standard variety, whilst some models may be loaded in whichever direction, such as the swivel eyebolt.
An imperative detail to take into account is the weight, size and shape of the load that is to be lifted, along with the number of lashing points which will likely be needed; the angle of inclination of the sling to be used is also of major importance , as slings utilised at varying angles will affect their safe lifting capacity ratings. There have got to be sufficient lifting points to supply suitable suspension for the load, and also the total safe working load limit must never be exceeded. You will additionally need to contemplate where the eyebolts will be fixed, and also make sure the structure is able to take the weight, and in addition can be drilled to produce a suitable and secure thread hole for the eyebolt to be screwed into. The eyebolts will need to be positioned in a manner to ensure that the sling system and also the structure will allow a smooth and safe lifting procedure. The safe working load limits that are marked on the eyebolt are intended for an in-line pull, unless specified otherwise .
The majority of eyebolts are produced from high tensile, drop forged steel, which makes them particularly robust, the standard variations may be finished in its self colour, electro-galvanised or hot dipped galvanised; you can find some eyebolts obtainable which are made from stainless steel to provide appropriate anchor point s for areas with high chlorine concentrations and sea water. At the top end of the huge array of eyebolts are the ones with a exclusive finish in which the original colour visibly alters when the temperature increases, enabling the working load limit to be reduced at certain temperatures, which is of crucial importance.
Occasionally eyebolts will need to be used in circumstances where there is going to be much twisting and/or vibration, this is able to unintentionally slacken the bolt thus become un-secure; shock loading will have a similar effect; in these situations it’s essential to further fasten the bolts in order that they will not become loose and perhaps twist totally out. This may be accomplished by using a suitable fixing adhesive to the bolts when installing; crown nuts that have a counter nut or key might also be utilised.
As with every type of equipment used for lifting loads there are vital protocols in place to ensure safety, and so ought to be adopted at all times when using eyebolts of any variety, the fundamentals are as follows; Examine prior to each use to make sure there is no damage, such as, cracks, distortions and gouges, they must be seated properly and also the swivel type should revolve smoothly; capacity markings should be readable. Furthermore, when in use; single suspension points have got to be in the direct line of gravity; multiple points must be in the same lifting plane/angle, and also evenly spaced about the centre of gravity. Eyebolts are considered to be small or else loose lifting gear so therefore is required to be professionally inspected at six monthly intervals.
Finally we are able to conclude that when used and inspected in the appropriate and recommended manner, eyebolts offer sturdy suspension points for a broad array of loads and also conditions.
Steel beams are generally the “H” form and are the key component on most kinds of crane and as most cranes are utilised to lift heavy loads, certain lifting tools will need to be fitted to the steel beam, this needs to be completed securely and in a stable way, the perfect way to do this is to use a beam clamp or beam trolley which fasten firmly on the overhang/projection of the beam thus setting up a safe and secure fixing point from which to add further lifting tackle such as a hoist.
Let us now analyze the key variations between a clamp and a trolley.
Firstly, a beam clamp is precisely as its name states; it is a clamp which locks onto a steel beam. A semi-permanent lifting accessory from which to hang up a lifting device like a chain block, hoist or maybe a lifting magnet. The beam clamp is classed as a semi permanent appliance since it is utilised in a fixed position whilst under load and cannot be moved, nevertheless when the load is removed the clamp is easy to detach and re-locate at a different position along the beam.There are many variations of beam clamps that have different fixing/clamping mechanisms, sizes and lifting capacities. Locking mechanisms are standard on most models and shackles are easy to attach to aid easy hanging of the lifting device. Beam clamps are very easy to mount and are occasionally utilised in two’s with a spreader beam although if used in this manner take care to ensure no 1 clamp exceeds the safe working load. With lifting capacities of up to 10000kg there is certainly a beam clamp suitable for the majority of purposes.
A beam trolley similarly fixes to the lip of a “H” beam and enables lifting devices to be fitted effortlessly; that’s where the similarities end owing to the fact that a trolley has steel wheels to allow them to travel over the beam. The basic trolley is manually pushed back and forth whilst a geared model can be manoeuvred more simply by pulling on a chain, subsequently there is the powered models which are the simplest to operate by the use of remote/pendant control. The ball bearings enable smooth movement whilst the geared and powered models allow more accurate placement of the trolley, they may also be pushed whilst under load so is a key benefit against the beam clamp, yet a locking device can be added to lock it in place if needed.
For safety’s sake it’s always important to guarantee that the clamp or trolley is the correct dimension for the beam and of the correct capacity for the object to be lifted. You should always check they are securely fitted to the beam before every use and should on no account be used on damaged or distorted steel beams. Evidently you should on no account exceed the safe working load and you must also ensure the beam itself is capable of taking the weight of the load and appliances utilised.
The majority of cranes of any type use some form of beam clamp or trolley system due to the fact that they have steel “H” beams. Both are simple to mount and maintain and supply safe and secure fixing points for all supplementary lifting devices, for example electric hoists, chain blocks, lifting magnets, ratchet lever hoists and wire rope winches etc.
From the outset please note that the manual chain hoist is also regularly referred to as a chain block, block and tackle, hand chain hoist or manual chain block.
Let us now discuss what a manual chain hoist really is and how they work; as the title suggests it is a hoisting device, used to lift heavy loads via pulling on a chain by hand. A hand chain hoist features a suspension hook at the top, this is utilised to suspend the hoist on a suitable fixing point, this is generally a lifting gantry, a Jib crane or perhaps a beam of some kind, they are the safest options, nevertheless it could be just a heavy duty eyebolt anchored to a suitable structure, or maybe a sling hung round a beam, however the structure must be capable of taking the weight and strain of the load. Once the hand chain hoist is suitably hung then the object to be lifted can be attached to the bottom hook on the end of the chain, when securely attached the operator is able to start to pull downward on 1 side of the chain this must be done slowly initially to let you check the stability of the load once it is lifted away from the ground; (an unstable load could cause harsh injuries). The chain rotates about two gears inside the casing, this multiplies the force brought on by the gear ratio to raise the load. Nearly all hand chain hoists have a braking system to hold the load securely for repair work, or manoeuvering to a different position, they might also have an overload prevention device for added protection.
The most common chain block has two falls of chain to lift and let down the load, this is the lightest and fastest to use, however chain blocks are available with various falls of chain, i.e. four; they work exactly the same although the additional falls enable the hoist to lift heavier objects however are much slower since there is extra chain that is to be pulled through more gears.
There are a number of versions of chain blocks obtainable today, every one with various lifting capacities, common optional extras incorporate chain buckets or bags to store the chain in, protecting the chain from damage and personell from possible injury. Lifting equipment specialists will be able to offer good guidance on the best model for your needs.
So what are the advantages of using a manual chain hoist and where are they mostly used; Hand chain hoists permit heavy loads to be lifted with a great deal of precision, they are simple to manoeuvre from one position to another, are cost efficient and especially useful where there isn’t any electricity supply so an electric hoist cannot be utilised, and also where using electricity may be hazardous. The flexibility of the chain block allows it to be applied in many areas, frequently in workshops, factories and many industrial areas.
Here are the essential safe use rules that must always be adopted, but there are many more to stick to, these should be supplied along with your piece of equipment, get in touch with your provider if you don’t possess these safety guidelines.
On no account; exceed the swl; use if defects are noticed or problems assumed; stand underneath a suspended load; tip the load; change the chain without consultation with the provider/maker; lift people.
DO; examine prior to each use for problems; load with centre of gravity directly under the top hook; get it inspected every six months for safety reasons; check that the bottom chain hook will reach the lowest level necessary without the chain running out completely; always pull the chain in a smooth movement, don’t jerk it.
In conclusion; a hand chain hoist offers precision lifting in a portable and cost effective way, they are simple to use and simple to inspect and repair and suitable for a lot of lifting operations; all in all the manual chain hoist is an extremely adaptable piece of lifting gear.
If you are a builder or scaffolder then the odds are that you’ll already be aware of the advantages of using a scaffold hoist; if you aren’t a builder or scaffolder, or you happen to be thinking of buying a scaffold hoist and would like to know more about the benefits then read on.
A scaffold hoist, also known as a builders hoist, is an electrically driven appliance which can be used for raising and lowering objects, mainly up and down a scaffold tower. The hoist is usually attached on the scaffolding pole using a secure clamp, some designs merely hook over the pole and others could possibly be attached to a prop. This appliance can be easily positioned wherever needed and so an extremely adaptable appliance. These scaffold hoists are mostly utilised inside the construction industry and related areas by builders and roofers, and tend to be obtainable with various lengths of wire rope to match the height of lift which you require. Various lift speeds may also be found dependent upon the model.
The majority of building/construction work will neccessitate carrying equipment and supplies up to varying heights, frequently within a scaffold tower. Employees who carry objects up a scaffold system take great risk, scaffolds are dangerous to climb at the best of times, and are even more dangerous whilst carrying objects. Injuries and accidents are common, nevertheless the danger can be massively lowered by utilizing a scaffold hoist to quickly raise up your loads to where needed.
A builder’s scaffold hoist possesses the additional benefits of many accessories to use with the hoist to help in lifting particular objects; you will find wheelbarrow chains that happen to be designed to lift the entire wheelbarrow plus its contents to wherever they are required, a very helpful tool to a builder. Further accessories available include skip chains, designed for lifting up small skips; mortar buckets, for lifting mortar to wherever required, and also rubbish chutes for enabling any rubbish created at high levels to be safely sent to ground level, and several more.
It’s cost effectiveness is a major benefit, now we are going to reflect on how.
Countless construction buisnesses price jobs depending on the time it’s going to take, longer builds usually cost more. Since a builder’s hoist is electrically driven it will lift up and lower loads pretty fast, as compared to a human hauling objects unsteadily up and down a dangerous scaffold tower. Time off work for accidents and injuries are not uncommon, regularly caused by lifting heavy loads, even more so when awkwardly carrying them up a scaffold; Back and knee injuries are renowned amongst builders, yet the stress on the human skeleton can be minimised by the use of a builder’s scaffold hoist, consequently resulting in less time off work for injuries, no reduction in manpower and consequently no time lost on the job.
In conclusion then, a builder’s scaffold hoist not only delivers a much safer way of moving loads to numerous heights, it additionally offers a faster and more cost effective way. So if you would like to save lots of time, money, less manpower per job and yet provide a safer working environment for workers, then a scaffold hoist is a must.
This post will examine some basic facts concerning electric hoists, answering some common questions such as; what are they, why can they be useful, how are they used, were are they used and by who.
So what is an electric hoist? It is an electrically powered appliance that is used to lift, lower and even move heavy or awkward objects. They are mainly used to alleviate potential strain and injury on any person who needs to lift a heavy object or where the object is just much too heavy for a human to lift unaided.
Electric hoists can be seen in countless workplaces, such as; building sites, warehouses, car garages, docks, fabrication workshops, and have even been known to be used to lower chandeliers for cleaning purposes in large manor houses, as you can see an electric hoist is a very versatile piece of lifting equipment; they are often available in various capacities from 125kg up to 10000kgs so there is a hoist for most purposes, from lifting smaller loads to supremely heavy loads.
Now we will briefly examine how an electric hoist actually works.
Firstly the hoist itself will need to be fixed onto a suitable anchor point via its top hook, this is often a jib or mobile gantry crane or other suitable load bearing structures capable of taking the weight of the load to be lifted. Once the hoist is safely fixed into its place then the chain may be lowered down from the hoist and attached to the load to be lifted, this can be done in a variety of different ways depending on the size and type of load. It is often the case to use further accessories such as a lifting sling, either chain or webbing, as it is easier to attach these to the load at various points to ensure that the load will be evenly balanced and therefore not tip, ensuring a safer lift. Once you are sure the load is secure you may slowly begin your lift using the powered hand held remote control. You should always stop the lift for a moment once the load is just clear of the ground, (a test lift) to make sure it is stable and secure before continuing, this procedure will minimise the risk of injury.
The majority of electric hoists have built in safety features, hooks will have safety catches so the load will not become disengaged. Most hoists will have a clutch system which slips at a preset torque, this is to prevent overloading the device which is very dangerous. Some electric hoists have a switch mechanism where the chain will mechanically engage if overloaded. Various newer hoists will have safety cut out switches for emergencies. These features are extremely important for safety reasons.
Why should electric hoists be used? A good question; there are many advantages of which the biggest is probably the safety issues, they greatly reduce the risk of accidents and injuries because they bear the whole weight or the load, the only thing the user has to do is ensure the load is secure and press the powered lift button, therefore there is little chance of injury to that person, which could have produced back problems had that person lifted the load him/herself. Cost efficiency as an additional benefit to using an electric hoist, they cost little to run, need only 1 person to operate it, and has good longevity if looked after. It could take many people to lift a load that a single hoist can easily lift, this reduces costs of extra manpower, and sickpay if an injury occurs, using a hoist will also complete a lift much quicker, time is money!
In conclusion we can assume that using an electric hoist has many benefits, mainly safer and more cost efficient, and can be used even for the most unlikely tasks.
Utilizing any sort of lifting gear, whether it’s a little item like a shackle or chain sling, or a bigger machine like an electric hoist or jib crane is often dangerous if particular procedures aren’t followed. Some years ago new regulations were released on the safe use of lifting gear, this is referred to as LOLER; or lifting operations and lifting equipment regulations. These regulations also contain inspection procedures for lifting devices to make sure they meet the requirements set.
We will now consider perhaps the most crucial elements of safety when it comes to using any lifting gear product.
The safe working load (SWL) of any lifting gear is crucial to its safety, and must be easily noticable on each product, if not then it will require testing to evaluate the SWL and a test certificate should be issued to verify this. The safe working load is the utmost weight the device can lift safely, and so must never be loaded in excess of this limit, it is often recommended to use a tool with more capability to what you are likely to need to allow for mistakes however providing much better safety.
An additional major issue to take into consideration is care and maintenance of all lifting equipment in use. Prior to each use, especially if it has not been used for a while, it can be recommended to give the item the once over, checking for any problems which may be detrimental to its safe use, this could be something as simple as a loose bolt of even minor cracking in the welded joints. If any defects are noticed then the item should not be used until it has been corrected and re-tested if necessary. It’s also important to note that all lifting gear products must undergo safety inspections regularly, 6 or 12 monthly is the norm.
An additional ideal safety practice to perform before each use is the test lift, highly recommended by skilled lifting gear operators. This procedure is done by securely connecting the item to the preferred lifting device after which you can very gradually and gently lift it just off the ground, the object can then be assessed to make sure it is held securely and is well balanced, at this stage it may be simply lowered and corrections made if needed. Carrying out this practice before the complete lift will greatly reduce the chance of the lift failing and causing injuries.
All lifting processes must be carried out in a careful manner to minimise the chance of problems, especially if the user of the appliance isn’t experienced, for example if you’re using a chain sling to lift your load, there a variety of different types of hitches appropriate for various loads, and it requires years of practice to know the best one to evenly balance your load about the centre of gravity so that it will not tip. Wherever feasible it’s best to have the users trained properly to operate some lifting gear devices, or at least keep to the user guidelines which should come with the product.
These safety tips are merely the tip of the iceberg, there are many many more which are more suited to particular lifting gear products, these guidelines for the safe use should be issued on purchase of the equipment, if you don’t have them at hand then a good lifting gear specialist should be able to provide you with a copy.
This piece of writing examines the various types of lifting gear, where it is frequently used and how.
Any product which is used in the practice of lifting, lowering or moving loads are broadly known as lifting gear, lifting equipment or lifting tackle.
Lifting gear is used instead of man-power to lift loads that would be too heavy for a person to lift safely without the risk of personal injury. It ought to be noted that it is highly recommended and in several cases a necessary requirement to get all lifting gear tested and inspected for faults on a regular basis, test certification should always be issued and kept.
Next we examine the fundamentals of small and large lifting equipment.
Shackles are made from strong metal and take the appearance of a U shape; used as a kind of connecting device connecting 2 items, a shackle will possess a bolt or pin to provide its locking device and so ensuring a secure hold.
An eyebolt is a screw with a loop on the end instead of a screwdriver slot, they can be screwed into numerous surfaces to provide a secure attached anchoring point to which other items can be fixed too.
Ratchet lashings or load restraints are not only used daily by many lorry drivers but in addition by the general public, they are widely used for tying down and securing items, for example camping gear on a trailer, the webbing strap is threaded all the way through a cam buckle which when pulled taut will hold the load firmly but permits rapid release of the load when needed.
There are many varieties of lifting slings available, from web slings, chain slings and even wire rope slings, all utilised for different purposes, the softer webbing slings tend to be utilised for lifting more fragile or easily marked loads and chain slings for a tougher and more variable approach as they can be used in different combinations for different load types.
A pallet truck facilitates easy movement of bulky items, commonly utilised in warehouses and factories. They vary in size although will all have wheels on the flat base and an extended handle at one end for steering, pallets and boxes are mostly transported this way.
A plate clamp is a tool that is used to lift steel sheets by clamping around the perimeter, they are normally used in pairs, sometimes more based on the dimension of the sheet, to offer stability. Plate clamps tend to be fixed on to a hoisting device to deliver the lifting power. A lifting magnet also lifts sheet materials but they need to be ferro-magnetic like mild steel since they work by means of using a magnetic force to lift the load, these devices are frequently observed in steel workshops.
Beam clamps and trolleys are devices that fix onto the projection of a beam on a mobile or jib crane for example. A beam clamp stays in a fixed position where as a trolley can be manually moved along the beam, or by the use of of a handheld remote control if it is a powered trolley. These devices offer a safe fixing point to enable further products to be attached for lifting, for example a hoist.
Next we look at some larger lifting products commonly used.
A ratchet lever hoist lifts loads by means of a ratchet mechanism, powered manually by manoeuvring the lever back and forth, they can be used for tensioning in varying directions. A manual chain hoist/chain block are among the most often utilised pieces of manual lifting gear, lifting and lowering loads by means of pulling on a chain.
Electric hoists are very popular as they provide a simple means of lifting heavy loads, many different types are available, suitable for a variety of purposes and lifting capacities. Most electric hoists use chain to lift however wire rope hoists are also available. A further powered hoist will be the pneumatic air hoist working from an air supply and ideal where electric is not accessible or not appropriate.
Mobile or lifting gantry cranes provide a transportable framework to connect your lifting hoist too. A non-permanent device that may be moved on its castors to anywhere it might be needed, these can be produced to fit your size and lifting capacity needs, and consist of two “A” shape end frames having a “H” beam across the top. This is a very popular piece of lifting gear.
A Jib Crane is a semi permanent piece of equipment which is extremely popular in both large and small industries. The jib cranes arm can be swung or slewed about its vertical fixed column, up to 360 degrees depending on the type chosen.
An overhead crane is a much larger piece of lifting gear, frequently used in large manufacturing factories, high up within the ceiling space. They lift and move loads over a track by means of remote control and hoists. These are a permanent piece of equipment so probably not so adaptable as the mobile gantry.
In conclusion then we are able to see that there are many different varieties of lifting equipment tools to help in handling heavy loads, though this short article has just scratched the surface of the leading varieties.