Circus Tent Erection – Blocks, Pulleys and More

Here at Ronstan we know our blocks and pulleys are used for a large number of exciting tasks – such as erecting a circus tent!

Ronstan we know our blocks and pulleys are used for a large number of exciting tasks – such as erecting a circus tent!

Key Elements of a Circus Tent
Firstly, becoming familiar with all the elements which make up the tent is key. Knowing how they work, which part does what, and most importantly; what goes where! Secondly, it is all about the tools. You will need these key items to erect your circus tent:

  • Tent Canvas (for the roof)20
  • The Central Pole
  • The Secondary and Tertiary Poles
  • Individual Pole Bale-Ring and Flag Staffs
  • Some Strong Stakes
  • A Sledgehammer
  • A Series of Strong Blocks and Pulleys
  • At Least 500 Feet of Strong Quality Rope

Step 1 – Assess the area15
The starting point is properly assessing the area in which you wish to erect your circus tent. The required size of the area is very much dependent on the size of your tent (typical oval circus tents are usually around 118 feet by 150 feet but they can be as large as 500 feet). So be sure to know what you are working with to start.

2–Mark out the area16 The next step is then marking out the area to match the diameters

of our specific tent. Be sure to do this with caution, as measuring accurately is of pivotal importance when erecting such a structure. The next marking is also important. You should work out the exact center of the space, as this is where you will place your central pole.

Step 3 – Time to stake out19 Next comes the fun part – driving the stakes into the ground. Using your sledgehammer, drive each stake into the ground until only a third of it is showing, this will ensure that these grounding are secure. Now the stakes should be quite a size, up to five feet long and three inches thick.

Step 4 – Roll out the canvas!

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Now it is time to unfold the canvas. Roll it out within the confines  of your market out area so that it is central. Then prepare the internal poles by placing spacing them out equally between the stakes, at this point again refer to your tents instructions for specific dimensions for your individual tent. Create a small hole for the central pole to be placed in. Then prepare your Ronstan block and tackle units, and the flag staff by attaching the block and tackle to each pole, and connect the strong ropes for the raising and positioning of the central pole. Assemble the crew and use the pulley system to erect the central pole, with one member at the base of the pole armed with a crowbar for positioning, and a small group to physically aide the pole in its erection.

Step 5 – Fasten the canvas5
Then it comes to fastening the canvas roof in place. Each portion needs to be secured to the bale ring which encircles the centre pole by rope. Next prepare the bale ring of each pole for raising, by once again utilizing the pulleys. Then when you pull on the ropes the tent will lift to the ceiling, then you must close the seams at the bale ring of each pole and tie off the ropes.

Step 6 – Erect the minor poles
Finally, you can erect the minor poles throughout the circumference of the tent. Mount each upon a stake and then lift with the same rope and pulley procedure used for the main poles. The canvas will now be airborne, perfectly supported by each of the poles. Fasten the tent top to each stake and secure all ropes and flaps. Now you are ready to perform a final safety check before working on your stage and lighting rigging.

Ronstan Industrial provide the equipment people can rely on.

 

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The Beauty of Stainless Steel Cable Railings

Sleek, modern and clean; stainless cable railings are growing in popularity in many different locations.

Beauty of Stainless Steel Cable Railings

Advantages of Stainless Cable for Railing Systems:

  1. Aesthetic feel. By using stainless cable instead of wood or cement for railings and balustrades, the entire aesthetic feel is transformed. There is a certain sense of stylishness that’s undeniable, and its elegance is assured due to the clean and sleek lines. It’s a thoroughly modern look perfect for 21st century buildings and homes.
  2. Free and uninterrupted views. What’s more, views which can be hampered by wood or cement barriers become free and uninterrupted. For outdoor decking, you get much better views, and there’s a certain sense of freedom and space.
  3. Easy to maintain. These stainless cable systems are actually very easy to maintain. After all, they are stainless steel, so they don’t need much maintenance at all. They can be impervious to the elements, and they can stand much wear and tear. They are much harder to damage. Wood and cement barriers and railings, on the other hand need constant maintenance. Their looks are easily marred by dirt and grime, and they need constant upkeep. For cement railings, you’ll have to repaint every so often if you want to maintain a pristine look. Wood railings have the same vulnerabilities.

Read more about an Advantages of Stainless Cable for Railing Systems.

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How Pulleys Changed the World

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Pulley System

As is the case with all the simple machines, that these days we couldn’t do without, the origin of the pulley system is unknown. It is thought that by 1500 BC, people in Mesopotamia were using rope pulleys for hoisting water.

The first documented use of compound pulleys in a block and tackle system is that of Archimedes, and it’s almost certain they were used in the building of the famous Stonehenge in the UK.

Pulleys work by trading distance for effort and changing the direction of the force. An7 example, in simple language, using two pulleys to lift a weight it only needs half the force to lift it as it would with one pulley, however if the weight was being lifted one metre high, two metres of rope would be needed.  This is termed the ‘mechanical advantage’ and can be increased by adding more pulleys into the block and tackle system.

Pulley Systems

The three types of pulley are:

  • Fixed axle – mechanical advantage of 1
  • Movable axle – mechanical advantage of 2
  • Compound – a combination of fixed and movable pulleys, the mechanical advantage equals the amount of pulleys used.

Pulleys were responsible for the birth of the crane. The first recorded cranes appeared in Greece around the late 6th century BC, now it’s an indispensable piece of machinery that most of us see on an almost daily basis.

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When is a pulley not a pulley?

Answer : when there are more than 2 and then they become a block and tackle.

Block and tackle pulley system consists of more than one block with rope, are termed tackle.
A single Pulley

 

A single pulley is seldom used on its own, generally several of them are used in the commonly known ‘block and tackle’ systems, an individual pulley being a block and, in an assembly of more than one block with rope or cable threaded through, they are termed tackle.

The more pulleys that are used in the block and tackle system, the easier it becomes to lighten the load.

There are, of course, several types of blocks available:

  • Stainless steel blocks which have the great advantage of long life and virtually no maintenance
  • Ball bearing blocks which give low friction and maximize the load bearing performance
  • High capacity blocks used when strength is of paramount importance
  • Block and tackle pulley system consists of more than one block with rope, are termed tackle.Special purpose blocks, e.g. those that can be permanently mounted within walls
  • Snatch blocks, used to ‘snatch’ some of the load as they can be inserted anywhere along the load-bearing cable/rope without having to remove the load to re-thread the cable/rope
  • Blocks manufactured from different materials for different uses

It would be very difficult to imagine how life would be without the invention of the age-old block and tackle!

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Blocks and Tackles – Pulley Systems for Dummies

Safety Systems for all purpose.
Blocks and Pulleys

Just about everyone has seen a crane working at a building site, but have you noticed its attached mechanisms? (Its block tackle & pulley systems ) If you look carefully you’ll notice there’s a block and tackle, an indispensable piece of equipment which can be seen in numerous places and for numerous uses.

Block & Tackle

A block and tackle is a system where several pulleys, or blocks, are joined together with ropes, belts or chains to raise or move heavy weights, the word ‘pulley’ has become synonymous with the word ‘block’.

Different block and tackle systems are used according to the weight they are required to lift, working out the tackle needed requires some degree of mathematical ability but in simple terms, for those who dislike maths, it’s all to do with what is termed ‘mechanical advantage’.

If we imagine someone drawing water from a well the mechanical advantage is the ratio of the force produced, i.e. the power to lift a full bucket of water, to the force applied to it, i.e. the effort put into the lifting which, without the pulley, would only have been enough for half a bucketful.

For more the various tackles with their mechanical advantages please visit us.

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How to set up an Outrigger | Ronstan Industrial

Ronstan provide a range of specialist fittings which can be used for some of the key elements of outriggers. A great addition to fisherman’s boat are outriggers as they enable them to increase their total  catch.

An outrigger is usually positioned rigidly to the main hull but as with most boating equipment, there are several types of outriggers and the mounts that they sit on.

How to install your outrigger

Depends on which mounting option you have gone for, but there are a few tips that should be followed when mounting any outrigger. Firstly all mounts should be through bolted, Outriggers are a great addition to any fisherman’s boatpreferably with stainless steel and additional backing plates. Secondly you need to carefully consider placement, to make sure that you have adequate access to the outrigger components as needed. Thirdly, do not use poles that are disproportionately heavy for their intended usage – pick the lightest possible for your boat and desired set up.

When setting up your outrigger you need to ensure that the end where the line attaches is at the right height. If set too high or two low you can run into problems. The ends of the poles should be about four to five meters above sea level for optimum usage. That is, an angle of setting up your outrigger you need to ensure that the end where the line attaches is at the right height.around 30-40 degrees from the horizontal marker. It is important to remember however that the further the lines run, the more the tow angle is reduced. A reduced angle doesn’t help the lure’s action but can be improved by lifting the tow point by running it from the outrigger out to sea.

Make sure you have the right components, and someone to help you, and setting up your outrigger should be pretty simple or if in doubt your local fishing shop or your boat supplier should be able to recommend the most appropriate set up.

Ronstan provide a range of specialist fittings which can be used for some of the key elements of outriggers. This includes our blocks and shackles.

Contact us for more Information: https://www.ronstanindustrial.com/


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Working Loads vs Breaking Loads

Rigging Pulleys - Industrial Hardware - RonstanUnderstanding the safety factors of the equipment you are working with is paramount no matter the industry you are working in. With this, it is important to comprehend the differences between working loads, and breaking loads – which may sound the same, but they are not. Any configuration of equipment is only as strong as its weakest, or lowest rated parts. Both terms are a form of rating.

The term working load limit, is most frequently used in rigging terminology, it was the cornerstone of engineering for many years. It is the breaking load of a component divided by an appropriate factor of safety – a safe load that was the maximum carrying capacity. The terms usually apply to equipment such as hooks, slings, shackles and the like.

The working load, sometimes also known as the safety working load, or normal working load (just to confuse things further) is the mass that the equipment being used can safely hold, lift, or lower without there being a fear of breaking. In shorter terms; the maximum load that can be applied to the product safely when in general service. This is most accurate when the product is new and without any ware. This is measured on a straight line pull only, and side pulling can produce different results. It is also important to make sure that all components in a system have the same working load limit.

block tackle pulley system - Industrial Hardware - RonstanThe breaking load also can be known as the rated capacity. This measure is the force that the piece of equipment breaks when tested at as opposed to measure of mass it can hold. Force is consistently applied at a uniform rate of speed to ascertain the breaking load. The breaking load, or breaking strength as it is also called, is a vital part of the calculation of the working load limit.

The working load is one fifth of the minimum breaking strength. The tests which are undertaken in the laboratory are testing under normal environment type conditions and so when using in adverse weathers or other settings that may include different chemical levels, this should be taken into consideration.

Blocks and Tackle - WorkingAtHeight - Industrial Hardware - RonstanThe working load limit of any piece of equipment must never be exceeded, and components must be properly matched. As logic would suggest, it is best to avoid heavy impact shock loads, or any abstract movement such as winging or jerking. Anything like this can lead to stress on the product which leads to the breaking strength and the working load limit being exceeded causing the wider mechanism to fail.

If you need advice on the right products for your safety equipment please contact us. 

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