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5 Tips on how to safely cut concrete!

​Concrete cutting can be a big part of building or renovation projects

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Picture courtesy of SEQ Concrete Cutting Pty Ltd

Concrete cutting requires incredible precision, proper training, and the right equipment. Due to the complexity of the job, it should be a task reserved only for professionals.

There are many ways to cut concrete and various types of cutting machinery to get it done. In building or concrete demolition projects, the cuts can vary in depth and length. This is why a precise and well-trained hand is needed to ensure that the cuts are created in the exact size they should be.

The type of cut needed for each project should also be used as basis for the type of equipment to be used to cut the concrete. Whether you’re looking to cut curved or straight, deep or subtle lines, there is always the right equipment to get the job done.

If you’re looking for professional concrete cutters for your project then choose a local contractor who has the manpower and machinery to provide the services you need.

Regardless of whether you need to cut concrete to create windows or doors or simply would like to get concrete floor sawing services, professional contractors can get these done for you. In fact, there is a specific machine to ensure safe and precise concrete cutting for your project, and the right contractor should know which one to use.

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Picture courtesy of SEQ Concrete Cutting Pty Ltd

Five methods to ensure safe and efficient concrete cutting on your construction project

Flush cutting
If you need to cut a straight line on a concrete floor then flush cutting is the best option. The flush cutting saw creates a precise straight cut at any depth, making it the perfect tool for cutting concrete or reinforced concrete.

It’s also ideal for cutting stone or bricks. With proper training, a flush cutting saw is generally easy to manoeuvre. It’s considerably smaller too, which makes it a great option for cutting in small or narrow areas that large machines can’t reach.

Hand and ring sawing
Hand saw and ring saw are great cutting machines to use for concrete cutting. They can work wonders especially when manoeuvred by skilled hands. These types of machines are perfect when you need to create precise cuts without much regard to the depth.

These cutting saws are best used for wall sawing, cutting expansion joints and doorways, and removing footpath and concrete slab. They are highly efficient and use a dust and water system to avoid dispersion of debris which could cause disruption of work in your site.

Hydraulic and High-Frequency Sawing
Concrete cutting can be noisy and disruptive. This is why it’s not always the easiest task to manage if you’re working on an indoor project. It can quickly become messy and time-consuming with the preparation, actual cutting, and post-cutting cleanup.

Hydraulic and high-frequency sawing by professional concrete cutters is a quick fix to the problem. These types of cutting saws generate low noise and are fume-free, which make them the perfect option for indoor projects. They’re also easy to manoeuvre, making concrete cutting a lot easier.

Road sawing
Large scale indoor and outdoor projects such as floor or road sawing often require special types of machinery that will ensure that the cuts are precise with the right depth. For these projects, special concrete cutting saws must be used to ensure perfect cuts.

Professional concrete cutting service contractors often use equipment that can create cuts with a depth of 375 mm to 500 mm. These cutting saws can cut through floors, asphalt, and pavements.

Diamond saw cutting
There are two types of diamond concrete cutting saw: the dry cutting saw, and wet cutting saw. The dry cutting saw generate the best result when successional cuts are made on the same spot to increase depth.

Meanwhile, the wet cutting saw can be used continuously as it uses water to prevent dispersion of dust and prevents the saw from overheating. Both cutting saws are often used in large scale projects as they can create precise and smooth cuts on concrete.

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Picture courtesy of SEQ Concrete Cutting Pty Ltd

Concrete removal and demolition

It’s common in renovation projects to alter the size or totally remove concrete, whether it’s concrete floors, slabs, pillars or walls, among many others. Usually, concrete removal is regarded as a messy task that needs a lot of precaution and planning.

While it is true that concrete removal can be stressful, it doesn’t always have to be as costly and complicated of a task as most people regard it to be. With the right professionals, it can be done in the fastest and easiest way possible.

As established earlier, one of the perks of working with concrete cutting and removal contractors is their plethora of high-quality machinery. But more than that, they are the best option for the job because of their training and safety gear. They know how to cut and remove concrete in the safest and non-disruptive manner possible.

Core drilling

Apart from concrete cutting and concrete removal, core drilling is also another highly sought after service from professional contractors. Drilling on concrete is often sought before electrical or plumbing installations in buildings.

A modern core drilling machinery can drill up to 1000 mm in-depth, with a diameter of up to 1200 mm. Professional contractors can do regular drilling, inverted drilling or stitch drilling — all depending on the type of holes needed for your home’s engineering and architectural plan.

When working on a renovation or a new building, knowing what types of concrete services you’ll need from professionals can make the entire process a lot easier for you. You can effectively relay to professional contractors what you need and they can guide you through the processes needed to get it done.

And since a good contractor essentially means easier building and renovation, you must do your due diligence before committing to one. Choose contractors who have the experience and skills needed for the job and are situated locally.


Tefcold owner becomes Interlevin MD

UK: Torben L Christensen, the owner of Tefcold, has taken over as MD of Interlevin Refrigeration.

He replaces Jonathan Corns who was appointed MD last year following the company’s acquisition by Tefcold, the Danish family owned commercial refrigeration company.

“We see Interlevin as a very important part of the Tefcold Group and for Interlevin to reach its full potential we believe we have an obligation to get the best possible integration into the group,” said Christensen.

“The group management have decided that I take over as MD in order to make sure we share best practices around processes through the group and grow Interlevin within the marketplace. While we have seen many operational improvements during the last financial year, we know that there is still room to grow and maximise our offering within the commercial refrigeration sector.”

Survey seeks to boost womens’ careers in RACHP

UK: The IoR’s Women in RACHP Network is inviting the refrigeration, air conditioning and heat pump sector to complete a survey to gauge attitudes towards women in the industry.

As the RACHP sector continues to struggle to bring more women into the industry and utilise female talent to its full potential, the Women in RACHP Network is undertaking research in this area in an aim to drive change. The network is encouraging everyone in the sector to take part in the online survey which is intended to benchmark the industry’s benefits and attitudes towards women and explore what should be done to close the gender gap.

It is clear that women are under-represented in engineering and the RACHP sector is no exception.

“Although there are no official figures in the UK the reality of the RACHP sector is comparable to that of the US where women represent only 1.2% of the HVACR workforce,” said committee member Astrid Prado, marketing manager at Star Refrigeration.

Maintaining that a reputation for the refrigeration and air conditioning being “man’s work” is failing to attract talented women at all levels, Prado said it continued to operate with work packages “developed decades ago for a largely male, full-time workforce” and was “failing to keep pace” with the expectations of the modern workforce.

“In order to drive change, we must redesign current workplace practices to accommodate the diversity of today’s workforce who want flexibility, equal opportunities, and better access to training and development.”

Prado added, “Although this is only a starting point, the outcome of the research will serve not only as a point of reference but as industry guidance for the future, to help us improve and ensure we offer an attractive package to women so that they are inspired to join and stay in the industry.”

The survey is open to both men and women working in all roles and from all pay grades and structures. All entrants completing the questions before December 1 will be added to a prize draw to win a Latitude travel charger set.

The Women in RACHP Network was set up by the Institute of Refrigeration as an educational and networking group to encourage diversity in the workforce and promote the role of women in refrigeration.

Contractor group moves to allay fears on R22

USA: The USA’s largest air conditioning contractors’ association has moved to allay US fears regarding the future availability of R22 refrigerant.

The production and importation of the main air conditioning refrigerant R22 will be banned in the US from January 1 under Montreal Protocol phase-out agreements. While existing stock and reclaimed/recycled material will still be able to be used, there is concern in the market regarding future prices and availability.

The Air Conditioning Contractors of America (ACCA), which represents over 60,000 members and 4,000 businesses, says it believes there will be enough stockpiled and reclaimed R22 to allow for a smooth R22 transition.

“Do we know how much R22 is and will be available? No, but there are some indicators that show that R22 should be available for several years,” says ACCA vice president, public policy & industry relations on the association’s website.

This he bases on ACCA’s research and in working with refrigerant manufacturers and reclaimers.

He quotes Arkema’s director of sales saying: “Arkema has done significant market research and we estimate that there is sufficient R22 to serve the market needs for at least five years.”

Haun also stated: “Take R12, for instance, which was phased out on January 1, 1996. There are still R12 systems operating in the US and contractors are still able to purchase R12 to service those systems.”

However, according to a large reclaimer, one of the challenges that could decrease R22 availability is the mixing rate of reclaimed product. Some reclaimers lack the ability to separate refrigerants when they received recovery cylinders that are made up of a cocktail of refrigerants. ACCA fears that the increased mixing rate and inability to separate those products could have an impact on the supply but is not certain that that alone would reduce the years of projected availability.

Dearman refrigeration technology is top tip

UK/NETHERLANDS: Dearman’s liquid-nitrogen-powered transport refrigeration units will be offered for lease to leading fleet operators by Dutch trailer firm TIP.

Following successful trials in the Netherlands and Italy with a top multi-brand foods company, TIP will deploy Dearman’s technology alongside their regular fleet of refrigerated trailers.

The Dearman technology replaces diesel-powered secondary engines used to power transport refrigeration units, and has the potential to cut CO2 emissions by up to 95%.

According to TIP vice president Benelux Rogier Laan, the company’s customers are frequently seeking answers to issues such as sustainability and the type of trailers to be used. “We therefore keep a close eye on technical developments within our industry and we test these developments regularly, including this revolutionary solution from Dearman,” he said.

AirCo Pakistan – Servicing | Maintenance | Troubleshooting

Excitement builds for the Cooling Awards on September 25

Excitement is building for the biggest night out for the cooling sector, with the Cooling Awards now just eight weeks away.

Our illustrious team of judges, drawn from all corners of the industry – an eye-watering 48 of them – have made their decisions following the face-to-face judging round. A total of 19 trophies are up for grabs in the main wards, meaning that a lot of people will be on tenterhooks ahead of the main event at the Hilton on Park Lane on September 25.

The RAC and IOR National Student of the Year Award will also be presented on the night.

As award-winning comedian and podcaster Russell Kane makes a triumphant return to the Cooling Awards, there is also set to be plenty of entertainment on offer for everybody, whether oR not they are directly involved in an award.  And with around 500 of the industry’s finest set to be attending the dinner, the networking is expected to be equally high-quality too.

There’s still time to book tables for the event at https://coolingawards.racplus.com

MEP Pojects and high temperatures – do you know the risks?

Heatstroke kills 32 year old former athlete

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Recently the sports world was rocked by the death of a young former football star who died from heatstroke. See the reports from the BBC and CBS news.World temperatures are rising and recently parts of Europe and the USA have experienced some of the hottest recorded temperatures. This last summer Australia also experienced record breaking temperatures.

So what can we do about heatstroke? Well this report from the BBC tells us more about the effects of heat on the body.

Those in construction are at particular risk of suffering heat related illnesses since they are often expected to do hard physical tasks for long hours, often out in the open.


Dealing with hot weather on projects

​It’s important that everyone on your construction project is aware of the risks that high temperatures pose. Everyone must be aware of the early symptoms of heat exhaustion so they can take quick corrective action before the situation deteriorates to full heatstroke. There should always be an adequate supply of cool fresh drinking water and workers must be encouraged to drink lots of water. Workers must be allowed to take frequent rest breaks in a cool environment. Where possible try and start work earlier when the day is still cool. Possibly schedule some tasks for the night – particularly pouring concrete. Rotate workers so that one worker isn’t working on a strenuous task all day.Be aware that people on medication, those taking drugs or consuming excess alcohol and caffeine may be more susceptible to suffering the ill effects of high temperature. Those use to working in more moderate and cooler climates are also not as use to working in hot conditions as others may be who have become acclimatised to these conditions, so it’s important to understand that people will be impacted differently by the heat.

High temperatures will impact productivity, but the construction schedule should not endanger people’s lives. Extreme temperatures above the norm may be reason to lodge a variation claim with the client.

Of course heat doesn’t also impact people’s lives it can impact concrete and other products. Concrete, mortar, adhesives and paints will all dry out rapidly, which could lead to problems with finishing the work as well as cracking and other problems.

Take adequate precautions to ensure that heat doesn’t endanger safety or impact quality on your construction project. Working in a cool office may insulate you from the severe heat while others on the project have to deal with the full impacts of the hot temperatures.

How will your project deal with the high temperatures?

AirCo Pakistan | Maintenence | Troubleshooting | Installations

IOR unveils revised good commercial refrigeration guidance

The Institute of Refrigeration (IOR) has partnered with the British Refrigeration Association (BRA) to revise the second part of its Guide to Good Commercial Refrigeration Practice with a focus on safety and environmental considerations.

Revisions that have been announced to the guide, the second part of which looks at system design and components, ties in to a wider nine-part focus on good practice for organisations working with refrigeration, heat pumps and air conditioning systems.

According to the IOR and BRA, the updated guide on system design and component selection, as outlined in part two, considers the complexities of addressing both environmental and safety considerations when planning the introduction of new cooling approaches.

A joint statement on the guide said, “It comprises chapters on compressors, chilled and frozen cabinets, condensers, refrigerant pipework, design considerations, plant room design and more. In this edition, the chapter on evaporators has been extensively revised and references have been updated throughout.” 

The second edition of the guidance on system design and component selection is expected to be followed with similar updates to the other eight remaining parts of the series over the next twelve months.

This will cover a range of topics focusing more specifically on changing safety and environmental considerations for different forms of cooling appliances, to system installation and commissioning. 

Other specific focuses of the guidance will focus on system maintenance and service, as well as a publication looking at the decommissioning and waste disposal process.

The eighth part of the series looks at refrigerant and retrofitting, with a final focus published in association with ACRIB focusing on the themes of competence, training and skills.

Members of both organisations are able to access the update free of charge, while the publication can be purchased separately by non-members.

 

AirCo Pakistan – Air Conditioning Solutions

Panasonic goes “big” with R32

UK: Panasonic has introduced the Big PACi series of air conditioners in 20kW and 25kW capacities using R32 refrigerant.

The additions include a water heat exchanger option and a split-able duct indoor unit which can be divided into the heat exchanger and fan parts, allowing for easier installation within narrow spaces such as small retail shops.

As well as being more efficient than its R410A counterparts, the R32 Big PACi series offers a reduced refrigerant charge. The indoor unit is also up to 16kg lighter in weight than conventional Big PACi R410 models.

Designed for easy installation, the new models are said to have a more compact indoor chassis with the depth reduced by 230mm versus the conventional Big PACi R410A range. The compact design is said to still maintain the same level of efficiency overall and has an SEER rating of up to 5.25 and SCOP rating of 3.61.

AirCo Pakistan – Troubleshooting, Maintenance, Installation

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