Acrow Props

An Acrow prop is a telescopic tubular steel piece of construction equipment. It is used as a temporary support. Acrow props are known by several names including shore prop, acro prop, acro jack and post shores. They are height adjustable by a wide diameter screw thread which is on the outside of the tube. The use of a screw thread means that the props are able to be tightened when already in place, which allows the user to adjust the load that each one bears.  The safe working load (SWL) that each Acrow Prop can bear depends on the size (please see table). The SWL decreases as the prop is extended.  Acrow Prop Uses Acrow props are used mainly for shoring to provide temporary support during building repair or alteration work. A typical use is to support an existing vertical beam whilst supports are removed or restored. Strongboys are used when masonry itself is to be supported; the strongboy is positioned into the bed joints. Then, an Acrow prop is put in place. Existing windows or doorways may also be supported directly or using strongboys. The base and top plates of props have a 150mm x 150mm surface area, so they are great...

Safety Before creating an opening in brickwork is advisable to make a list of materials you will need for the project. Don't forget you will require a small scaffold to work safely from. Two steel trestles by 3 or 4 scaffold boards wide is ideal. If you can install a handrail at the back of the scaffold even better. It is amazing how often people are injured from falling even when working at low heights. I'm sorry but I am going to shamelessly promote our Butlins Maxi Trestle. We designed the trestle purposely for working at low heights after noting many injuries whilst working at low height.  It's height adjustable with adjustable legs for uneven terrain or steps. It closes down to 47 centimetres and opens to 90 centimetres and you can install a handrail. It takes up very little space to store as it folds up and weighs only 10 kilos. Every Tradie and DIY should have a set. Placement Okay, so now that's out of the way lets get back to what your here for. You will need to install either a galvanised steel or concrete lintel into the brickwork to take the weight of the wall above the proposed opening BEFORE...

Working in construction? Need to support masonry or load-bearing beams, or any other load that requires vertical support? Acrow props are the best choice – so here’s a guide on how you should be positioning your props for maximum safety and efficiency. Where To Position Acrow Props Here are our top tips for positioning Acrow props for your project. On a solid, stable surface with proper load-bearing capacity – One of the most important things to do when placing an Acrow prop is to make sure that the floor on which you’re positioning the prop can bear the load of the wall or support beam that you’re supporting. Make sure to consult with a structural engineer when working indoors to keep you and your workers safe, and to use the proper plates and support structures when working with Acrow props outdoors and on softer ground. Failure to do so can cause the Acrow prop to fail entirely. As close to the wall as possible – There are several reasons that you want to position an Acrow prop as close to the wall as possible, when supporting brickwork or masonry. The primary reason is that you want to avoid the misuse of strongboys...

Acrow props are an essential tool for supporting timber beams, or for supporting masonry with timber needles or strongboys. An adequate number of Acrow props, when they’re in good condition and tightened properly, can support the load of just about any project. But if you’re using Acrow props for the first time, or you just want to make sure that they’re completely safe for your next project, you may be wondering how tight your Acrow props should be. Should the outer tube be tightened completely? Is there a risk that over-tightening may damage the bolt or the prop? In this quick guide, we’ll discuss all of these topics, and help you understand exactly how tight an Acrow prop should be when supporting load bearing structures. Get the details now. How Tight Should My Acrow Props Be? As tight as you can get them – by hand. When supporting load bearing structures, the last thing you want is for the prop to loosen. The outer tube could collapse or shift, resulting in an eccentric load, and the loss of proper support. To prop up a large, heavy load safely, you must spread the load across multiple props, and tighten them as much as you can...

Acrow props are an extremely valuable tool for projects that require you to support heavy masonry loads, such as supporting a cavity wall. They can also be used when you’re removing structural support beams, and to perform other tasks that require the proper support of heavy loads using a vertical prop. If you’re working on a large-scale construction or renovation project, you may be wondering how many acrow props you need, and how to set them up safely and properly. In this article, we’ll address this question, and ensure that you know how many props you need – and how to set them up safely. How Many Acrow Props Do I Need? This depends on a number of different factors, including: The rating of each prop – The amount of weight that an acrow prop can support decreases with its length. A size 0 prop, for example, is the shortest, and can extend only about 1.1 to 1.8 metres. It can support up to 3,000 kilograms. On the other hand, a size 4 acrow prop can extend up to 4.9 metres – but can only support around 1,300 kilograms. As a rule, you want to use the shortest possible acrow props for your...

Acrow props are one of the best temporary support options if you need to support a large, static overhead load. Whether you’re supporting a ceiling while removing support beams, heavy overhead timbers, or masonry with timber needles or a strongboy, an Acrow prop is a very useful temporary support to have on hand for a number of different projects. But one of the biggest drawbacks of Acrow props is that they have poor resistance to shear forces. Their support capabilities can become compromised if they’re more than 1.5° away from the vertical plane. Bracing Acrow props helps make up for this. Acrow props still should only be used to support vertical loads, but if you brace them, they will be stronger and more reliable, particularly in situations where horizontal loads may be higher than anticipated. Bracing An Acrow Prop With Scaffolding Tube – What You Need To Know Most modern Acrow props are designed to be compatible with standard-gauge scaffolding tubing. Using a coupler, you can easily connect multiple Acrow props together with scaffolding tubing. Typically, the best way to secure an Acrow prop with a scaffolding tube is to attach it to each prop in sequence diagonally. Doing so will allow the forces...

Acrow props are a great option for vertical support, especially for supporting ceilings in the construction industry when you’re removing support beams, masonry, or any other material. The proper number of Acrow props, when properly installed, can easily support even the heaviest loads, and allow you to conduct repairs and make building improvements without risking your own safety, or the safety of your workers. So, how can you use Acrow props to support a ceiling while removing load bearing beams or supports? Get the details from Australian Scaffolds below. Supporting A Ceiling With An Acrow Prop – Our Top Tips First things first, you should consult with a structural engineer to determine how many Acrow props you’ll need, and the proper size for your Acrow props. Failing to use the proper number of Acrow props can result in critical failure of the ceiling, and property damage, injuries, or even death. You should place your Acrow props on a solid, flat surface that can handle the weight of the ceiling, to ensure that the load is distributed properly. You may also want to use sole boards or steel plates to distribute the load evenly. In addition, your Acrow props should be as vertical as possible –...

Acrow props are a powerful way to hold up large, static vertical loads. They’re perfect to support a large timber cross beam during construction, for example, or to hold up a masonry wall for repairs. But when it comes to how long you should wait before removing Acrow props, you may have some questions. When is it safe to remove the prop? How should it be done? What precautions should you take? In this quick blog post, the team at Australian Scaffolds will help you understand all of the basics. When Should Acrow Props Be Removed? No matter what kind of work you’re using an Acrow prop for, you should wait until the supported structure can hold its weight on its own – or there is another brace or support in place. If you’re supporting a large timber cross-beam and replace the attached vertical support columns, for example, you can remove the Acrow prop once the new support structures have been securely bolted, nailed, or otherwise secured fastly in place. The Acrow prop should never be removed until the structure is completely sound. The same is true of a load-bearing wall – the acrow props should only be removed once new supports have...

There is no single answer for this. The distance that Acrow props should be spaced will depend on the total load you’re supporting, the material upon which they’re resting, the type of load they are supporting, the length of each Acrow prop, and the load bearing capacity of each device....

If you are thinking about using Acrow props (sometimes called a “jack post) for your next project, there are several things you’ll need to know about using them. In this guide, we’ll discuss everything that you need to know about installing them....

Subscribe to our newsletter and keep up to date with specials, industry news, safety standards, technical information and more.