Safety is our core value in Halfen Moment and it is the responsibility of all of us to work towards our goal: ZER0 fatalities and ZERO accidents. There are plenty of guidelines and regulations that we should follow on construction sites or workplace, and almost all of them pertain to the safety of the people who work there. Here are 10 common construction site safety tips:
Use Caution When Climbing On and Off Equipment
Falls when climbing on and off equipment is common, as is someone getting injured because they got stuck in the process. No one should stretch more than they should to grab onto the handles, nor should anyone carry anything as they are getting up or down. It is also important to never jump down from a machine, as they are when the most accidents happen.
Stay Away from Operating Machinery
It is common for workers who are waiting for the next step of their job to simply congregate in one area and patiently watch as someone else is doing their job. This is normally not an issue except when those people are standing too close to operating machinery. Most of the time nothing will happen, but accidents usually do not announce themselves first, so workers should stay away out of extreme caution.
Use Caution Around Fall Hazards
Every construction site has fall hazards and it is the worker’s job to be aware of what they all are. Safety systems should be in place in those areas to prevent falls from occurring for example, guardrails, safety nets, safety cords, and personal fall arrest systems.
Use the Proper Ladder Height
Some construction workers will try to get away with using a shorter ladder than they should, simply because a taller one is not available. This should be avoided if possible, because every time a construction worker stretches past the point that they should on the ladder they are using, they take the chance that they will fall off the ladder or the ladder will tip over and take them with it.
Keep an Updated First Aid Kit
That first aid kit from five years ago is going to contain medication that is outdated and band aids that are most likely past their sticky stage. Everyone should be prepared with an updated first aid kit. This kit should include disinfectant, ointment, painkillers, and bandages and gauze of all sizes.
Never Use Damaged Equipment
When there is work that needs to be done, some construction workers will simply use what they have available even if that item is damaged. That is never a good idea, as that damaged piece of equipment can cause an injury rather quickly. Some damaged parts can include a worn-out cable, worn-out cords, and a worn-out harness.
Never Unplug a Tool by the Cord
At the end of a long day or after a long tedious project, many construction workers may be tempted to unplug the cord of the tool they are using by simply giving it a good yank. This motion can damage the tool over time and it can also cause injury to a person. It is better to take the two extra seconds to go over and pull the plug out of the outlet, because those two seconds can mean the difference between life and death on occasion.
Be Aware of Surroundings at All Times
Construction job sites are busy places, which is why workers will want to be aware of their surroundings at all times. No one thinks that something bad is going to happen to them as they are simply sitting there taking a break, but one second of unawareness can lead to a person getting hit on the head by a falling object or getting run over by a piece of machinery.
Use Personal Protective Equipment (PPE)
Employers have duties concerning the provision and use of personal protective equipment (PPE) at work. PPE is equipment that will protect the user against health or safety risks at work. It can include items such as safety helmets, gloves, eye protection, high-visibility clothing, safety footwear and safety harnesses. It also includes respiratory protective equipment.
Manual Handling Tips for Safe Lifting
Over 40% of site injuries come from handling goods. Costs from handling errors leading to injury may include compensation and lost productivity. Putting in place control measures to help employees understand how to lift, push and pull correctly can solve the majority of these accidents.
These safety tips are designed to keep everyone safe on the construction site, and while many of them are basic common-sense things, they are still overlooked numerous times a day around the world. The one thing that every construction worker needs to remember is that accidents happen and everything that they do when they are on the job can be potentially hazardous in one way or another. Therefore, they need to be cautious every minute of the day, so that they can leave and go home the way that they came.
Selection of the Right Spacer
Concrete or Plastic spacers are little accessories used to maintain the position of rebars in the concrete structures before pouring the concrete. This is necessary to maintain a clear distance (cover) between the surface of the concrete and the rebar, as if there is insufficient cover, the rebar will start to corrode and result in spalling concrete. These spacers then become the permanent part of the structure after pouring. Although different types of spacers have similar features but the selecting the right one will ease the construction efficiently and safely. Hence, the selection of spacer will be based on the following factors:
Height of Spacer
The minimal height of spacer is equivalent to the dimension of the spacer to form the exact concrete cover for the rebar in concrete. Hence, this is the key specification needed while ordering. With the multi-dimension spacer, the heights for supporting the rebars will vary in depend on the position of installation. In a project, where the reinforced concrete structures have various concrete cover thicknesses, it is practical to select the multi dimension spacers with the appropriate dimensions.
Different heights of concrete spacer
Firmness of Subgrade
The spacers placed under the rebar mesh will be impacted by the forces from above such as the weight of rebars, workers and machines. If the contact area of the spacers with the soil/stone subgrade are not suitable, they can settle during construction. This condition will reduce the concrete cover thickness as required. Hence, if the subgrade is not firm, the spacers will need sufficient contact areas or some additional plates to spread the load from the spacer.
Suitable and sufficient of concrete spacers are essential to avoid reduction of concrete cover thickness
The material of the spacer being selected needs careful consideration as each material type has its pros and cons. Plastic spacers provide no compromise in terms of serviceability, but are generally weaker than steel and concrete versions. Therefore, if the cage being supported is very heavy or if the rebar has a high risk of being walked on, then plastic spacers should only be selected with extreme care. Steel spacers are more robust, but come with the added problem that there will be some non-structural steel within the cover zone. This can often lead to small rust spots being visible on the concrete surface, so if the surface is exposed and visible, steel spacers should also be avoided. In general, the simple concrete spacers can be used for all structures, providing the concrete spacer grade is similar to that of the surrounding concrete. Too much variation in properties can lead to localised cracking and compromise the integrity of the concrete locally around the spacer. There are many kind of spacers with various shape and use for selection. The users should firstly analyse the conditions and then select the right product in order to obtain the best efficiency.
Connection of Spacer and Rebar
There are a few examples of common options of connection between spacer and rebar:
a) Spacers are placed on horizontal surface and support the steel rebar above. By the weight and fixation of steel mesh then the spacers can be fixed without the binding connection. In this case, the spacer works as the blocks to form the right cover thickness. The long plastic spacer (continuous spacer) is the most cost effective alternative, placing under low loads area. It can be used in non-critical locations.
b) The spacer with tie wire or plastic/steel hooks for connection with rebar. By hook or tied-wire, the spacers are fixed at right positions and not falling out. This kind of secure connection is critical when spacers are vertically placed (when rebar cage is lifted or vibration of concrete).
c) The spacer with holes at their centers for inserting the rebar. Consequently the spacer can connect with the rebar and will not be taken apart even if the rebar moved.
Consequences of without proper concrete spacer- Vulnerable to corrosion and the concrete to early deterioration
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Inspiring meetings and interest from participants
Halfen Moment Singapore participated in BuildTech Asia 2018 exhibition from 22-24 October 2018. BuildTech Asia is the region’s leading trade show for the building and construction industry that addresses the challenges of building and construction across different verticals. Around 10,000 people in related industries from Singapore and the neighbouring countries attended this event.
A full range of innovative building materials were presented at our booth, showcasing the various applications of how Halfen Moment products can be used in a construction, from connection technology to reinforcement technology, providing solution and possibilities for a faster and safer construction. At Halfen Moment, we develop and supply essential building components, providing strength and stability to buildings and structures in Asia and Middle East.
We would like to thank you for spending your time visiting our booth at BuildTech Asia. It was our pleasure and honor as we enjoyed many inspiring conversations. We consider our participation in this event a success! To learn more about the Halfen Moment products portfolio, please feel free to contact us at firstname.lastname@example.org.
We look forward to see you again!
Halfen Moment Singapore Team
Halfen Moment Booth
With all the support given, the ASEAN Rail summit has been successfully held at the Hilton Hotel Kuala Lumpur, Malaysia from September 27th to 28th, 2018. Thanks to the strong support from the government and industry associations and other organizations, including Ministry of Transport of Malaysia, Embassy of the People`s Republic of China in Malaysia, Philippine National Railways, The Light Rail Transit Authority of Philippine, Indian Railways, Light Rail Manila Corporation, Sri Lanka Railways, Ministry of Transport and Civil Aviation Sri Lanka, China Railway Engineering Corporation(M) Sdn Bhd, China Communications Construction Company (M) Sdn. Bhd etc.
The ARS 2018 themed on
• One Belt One Road
• All-dimensional Connectivity
• Smart Innovation
• Welcome to the Future Together
Inherited the successful experience previously, inviting core rail transportation company from Chinese and ASEAN countries and government agencies, well-known suppliers, third party consultant and other decision makers.
The five general sessions discussed during this summit were
1) Urbanization and Globalization Trend
2) ASEAN Rail Transit Industry Policy and Market
3) Multi-dimension Cooperation to realize sustainable development operation
4) Global Technology Innovation Guiding Smart Railway Future
5) Improving International Project Cooperation, Global Opportunity Challenge.
This two-day schedule mainly focused on the ASEAN Rail Market through these five dimensions.
We sincerely thank all the delegates and hope that you have had a nice time during this summit. We believe we could carry out more extensive and friendly cooperation in future connection and wish you all the best!
Attended by more than 100 professionals from the railway industry in ASEAN
Inspiring meetings and interest from participating engineers in our products
Halfen Moment Malaysia and Institution of Engineers Malaysia (IEM) completed full day seminar event in Kuala Lumpur, Johor and Sabah respectively, addressing a wide range of salient topics to engineers in Malaysia including the topic of Mechanical Splices and Precast Lifting & Connecting.
The seminar held in 3 different states were attended by more than 200 engineers from Civil and Structural Engineering Technical division. Focused on a few of our key products, our speaker, Gary Connah, Managing Director of Halfen Moment Singapore discussed the available types, designs and applications of Mechanical Splices in the market. Innovative building accessories for precast lifting and connections were presented during the second half of the seminars.
Commented by one of the participating engineer, “The seminar’s technical, educational and learning features brought industry professionals in close contact with the global construction market and the latest technologies and developments, offering more than 5 CPD-certified educational sessions.
Please feel free to reach us if you would like to have us organizing a similar talk session in your office. Meanwhile, please visit our product page on Mechanical Splices and Precast Technologies or alternatively discuss your project needs with a Halfen Moment Representative. Stay tune for more IEM collaboration events in 2019, and we look forward to meeting you in our next event!
Jointly held seminar with IEM KL
Jointly held seminar with IEM Johor Bahru
Jointly held seminar with IEM Sabah
Group photo with Halfen Moment team, IEM committee and secretariats
Starter bars are rebars cast into a concrete to give a lapped connection to provide continuity of reinforcement across a cold joint or construction joint. Oriented perpendicular to the existing concrete element in which they are installed, they are also used to extend or rehabilitate existing bridges, roads and building structures.
The easiest and the inexpensive way of designing starter bars is to have them projecting from the concrete surface. However, complications arise when starter bars need to project through the formwork. Timber formwork needs to have pre-drilled holes in the accurate positions which may render the formwork unusable for future projects and cause difficulties when stripping. Not mentioning if it is steel formwork, which creates even greater problems.
Besides, projecting rebars can cause a safety hazard for both trips and falls. The cast in starter bars should have protective caps to minimize these risks. Projecting bars in precast concrete cause additional problems with storage and transport, and as a result are not commonly used. Rebar will also tend to rust easily when expose to weather.
Other than having starter bars with cast-in-situ in method, starter bars may be embedded in organic or minerallic mortars from a previously cast surface. Holes are drilled in the concrete at required positions and the bars are fixed with mortar. There are many suitable mortars available, although the higher bond strengths come from organic system, so these tend to be the most popular. The organic resin may be introduced via a gun/dispenser, or in a glass capsule that is broken by the bar, allowing mixing to occur. Care must be taken to treat the drilled hole as recommended to ensure adequate anchorage. The resin method is particularly useful for fixing of items such as posts or barriers where accurate position is needed.
Injecting Ankrochim resin while withdrawing the nozzle as the hole fills. Insert rebar with a slight twisting motion.
Mechanical Splice System
The easiest way to avoid having to have bars projecting through the formwork is to use a mechanical splice system (Rebar coupler). Simply engage a coupler onto the threaded rebar, which is then cast flush with the concrete (a coupler capping can prevent the concrete slurry from flowing into the coupler). The second bar is then connected to the coupler. To avoid loss of cross section, the end of the bar is ‘enlarged’ by cold forging the end of the bar before threading. No drilling is required in the formwork.
Starter bar from diaphragm wall using Moment Jointec Coupler
An alternative system (to ensure cost effectiveness for smaller bar diameters) has pre-bent and pre-spaced steel reinforcement supplied in a pre-galvanized steel box that is dimpled and flanged for maximum concrete bond. The system is used to enable efficient and reliable reinforcement continuity for sections of concrete structures that are poured in subsequent phases without the need to drill formwork.
This system not only improves on site productivity due to its installation speed, but also provides significantly higher shear capacities compared to traditional methods due to a higher shear friction. This enables us to reduce the amount of steel bars required to carry the same vertical load; reducing costs and embodied CO2 in the construction.
Installation is simply achieved by nailing the casing to the formwork or wiring it to the existing reinforcement bar cage prior to concreting. After removal of the formwork the lids of the box is removed and the bended bar being straighten and ready for lapping.
Plakabox is the only rebar box capable of making an anchoring which can transfer significant force around the structural joints.
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A group of 20 members of the Institute of Engineers Malaysia (IEM) attended a factory visit to Halfen Moment Malaysia. Participants had a meeting room discussion before the tour, where our Technical Manager, KC Loh presented a lecture on ‘The Different Types and Applications of Couplers and Threading Processes’, explaining how rebar couplers and threading services play an alternative yet important role for conventional splicing, saving the overall cost of the project and reducing rebar wastage.
Group photo before factory tour
Participants had witnessed our ISO 9001-2015 and 6S Safety Standards certified factory which comes with 360° manufacturing capability from cutting, cold upsetting, threading and packing to shipping. They also had their chance to observe the processes of proof load testing, manufacturing of corrugated duct and assembly of Plakabox.
“Our guests enjoyed both the lecture and the visit to our factory,” KC Loh said. “Our well organized production line made a strong impression on them, too. We hope educational and informational visits such as these will help young graduates and engineers in Malaysia to understand Halfen Moment’s commitment to produce localized building accessories supplies that meet and surpass local needs as engineers design innovative new concrete structures for the future.”
Token of appreciation from IEM
“Halfen Moment factory, products and especially their company culture cannot be matched. From fork-lift operator, supervisor, to directors, we witnessed the professionalism in each department to deliver steel products and building solutions to the construction industry. I was also personally impressed by their support given to consultants by way of regular testing and technical expertise, and the very evident commitment to safety. The seminar given by KC Loh was more than informative”, mentioned by one of the visiting engineers.
If you would like to find out more about Halfen Moment, we also invite you to visit our factory. In our guided factory tour, we will show you how couplers, rebar threading and our other products are manufactured. Please contact us via the contact form. We will contact you soon to arrange a time.
Together with our sister company HALFEN, Halfen Moment Group participated the seminar organized by Fenestra Malaysia, in partnership with PAM (Malaysian Institute of Architects) titled, ‘Building Envelope Design 2018’. More than 150 people attended the event including architects, structural and civil engineers, developers, as this seminar covers façade engineering fundamentals, UBBL imperatives for the building envelope, sustainability issues relating to the building skins and the importance of wind tunnel testing for tall buildings.
Halfen Moment team and booth presenting HALFEN cast-in channel fixing systems
Over 150 industry professionals attended the seminar
HALFEN cast-In channels were presented during the seminar. More than any structure tall buildings need a significant number of heavy-duty fixings, for example, for the fixing of elevator guide rails or curtain wall facades. HALFEN cast-in channels have been used for the curtain wall façade of Burj Khalifa in Dubai, UAE, with 828 meter, still the tallest building in the world, fixing more than 25,000 prefabricated panels of double-layer glass set within extruded aluminum frames. The use of the cast-in channel fixing system allowed an increase in site productivity of almost 30 % compared to traditional methods such as welding or drilling. It also results in a cleaner and safer worksite, with fewer workers required onsite.
Burj Khalifa during the installation period of more than 25,000 curtain wall façade panels.
In summary, the HALFEN cast in channel fixing system offers the following benefits:
- Adjustable and safe connection
- Highest degree of safety – not depending on workmanship compared to traditional systems
- No drilling or welding
- Fast installation – reduction of construction time
- Allows for simple future replacements / extensions
- Hot-rolled channels for fatigue relevant loads
- Serrated DYNAGRIP channels for seismic load application – 3D load introduction
- Increase in site productivity of up to 30% with reduced labour
Types of Concrete Cracks
Concrete is broadly known as an extremely versatile, cost-effective construction material. Yet it is also affected with some disadvantages that are inherent to its composition. By generally accepted engineering standards, concrete is relatively brittle and lacks ductility. Intertwined with these problems is concrete’s propensity to crack in both its plastic (early-age) and hardened (long-term) state. Early-age cracks are microscopic fissures caused by the intrinsic stresses created when the concrete settles and shrinks over the first 24 hours after being placed. Long-term cracking is in part caused by the drying shrinkage that transpires over time. In either case, these cracks can risk the overall integrity of the concrete and not allow it to uphold or possibly ever achieve its maximum performance capability.
Severe cracking from years of heavy truck traffic
Why Use Reinforcement in Concrete?
This is the basic reason why reinforcement in concrete is essential. Irregular cracks are unattractive and hard to maintain although generally do not affect the concrete’s integrity. Joints in concrete slabs are simply pre-planned cracks that are created by forming, sawing, or tooling. Concrete slabs that are designed for serviceability typically use reinforcement such as deformed reinforcing steel bars (rebar) or welded wire fabric (WWF) to hold cracks tight. The primary function for the reinforcement is to maintain aggregate interlock for load transfer and improve joint strength. Rebar and WWF do not inhibit the formation of cracks, but if properly positioned provide reinforcement once a crack has developed.
Fiber reinforcement provides the similar function, is mixed throughout the concrete and distributes the stresses attributed to shrinkage throughout the concrete panel making the joints much more stable. This distribution of fibers offers a complete reinforced cross-section of concrete and changes the way the concrete works.
Synthetic and steel fibers have been applied in concrete for over 30 years to improve concrete’s plastic (early-age) and hardened properties. Micro-synthetic fibers have been used to control random plastic-shrinkage cracking. Steel fiber and Macro-synthetic fibers have been used to provide crack width control in concrete after it reaches a hardened state. Combining both products gives advantages in both plastic and hardened state. The concrete applications that fiber reinforcement is used in includes, but not limited to, slabs-on-ground, composite metal deck slabs, topping slabs over precast panels, precast, and shotcrete.
Fiber reinforcement makes good concrete better because fiber reduces cracking and adds long-term durability to a wide variety of concrete applications. Fiber reinforcement offers an alternative construction method to traditional welded wire fabric and rebar reinforcement and provides additional benefits, including guaranteed 3-dimensional reinforcement, safer installation and more cost-effective.
Utilize of FORTA fibers to reinforce multiple slab applications of warehouse and bike path, increasing the load capacity of the slab and the fatigue performance.
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Committed to delivering excellence in the construction industry, Halfen Moment Group has selected 10 essential building products which have significantly improve the construction site safety, efficiency, cost and speed. These selected top 10 products have been vastly used by our clients and proven to
i) reduce construction time,
ii) improving construction quality,
iii) increase of lifetime of concrete structures,
iv) reducing of total construction costs.
2) Do you know that you can connect precast concrete elements by using coupler? Used together with Moment’s proprietary 100MPa grout, this coupler is tested to meet seismic requirements and can achieve bar break technology. Click to learn more about our Moment® Half Grout Coupler
3) Ever encounter a site situation where rebar threading is not possible for further rebar connection? A simple step by step execution of cold forged gripping the coupler sleeve against the rebar makes it possible!
Click to learn more about our Moment® Bargrip Coupler
4) Looking for a specific coupler for repair works, especially where one bar is already fixed in concrete with insufficient space? No threading is required and easy to install! Click to learn more about MBC Coupler
6) Looking for a quick, less labor and economical way of solution for connection to foundation or linking columns together? Immediately loadable, hence bracing is not required! Click to learn more about Halfen Column Shoe
Anchoring in Concrete
9) Facing any cracks issue in concrete due to shrinkage or expansion? Would you like to use macrofiber which is as strong as steel, with increased shatter and impact resistance? Click to learn more about our Forta Ferro® Macrofiber