Structural Connections For Precast Concrete Buildings
There are a number of ways of doing this such as via:
• Grouted Coupler for precasts walls and columns to foundations connection
• Wire Loop Box for precast walls connection
• Precast Coupler for precast elements connection
• Dowel Systems for precast beam to column connection
Apply the latest technology of precast connections from Halfen Moment, available in Malaysia, Singapore, India & Philippines. Discover more now!
Moment® Grout Coupler
Moment® Wire Loop Box
They are usually used to connect 2 adjacent precast panels together, where the interlocking rebar and wire loops provides robustness in the event of an Earthquake to ensure that grout degradation would not result in complete collapse.
Moment® Connection Loop
In order to connect 2 precast elements, both precast elements has to be cast with the Moment® Connection Loop at the wall. A rebar will then be inserted through the intersection of 2 loops. After placing the rebar, the gap between the precast elements will need to be grouted using a 40Mpa or 70MPa non shrink grout depending on the application. Material strength of the Moment® Connection Loop is 1770N/mm and complies to EN12385-4:2002+A1.
HEK Precast Coupler
Cast-in DEMU Fixing anchors i.e. T-FIXX®, bolt or bar anchors transfer the tension and shear force into the precast element.
The main advantage of the system is the fast and efficient positioning of precast elements. The connection can be subjected to load immediately after installation. This results in a substantial improvement in construction time.
But by keeping the grouting to a minimum, one such technology – Invisible Connections – has revolutionized the use of precast all throughout Northern Europe; it is a patented system, with its origins in Norway, to connect precast concrete without use of corbels or steel angles, and is used extensively throughout Europe due to the independently tested and certified European Technical Approval (ETA ) that provides engineers with peace of mind about the capacities.
The product range of Invisible Connections consists mainly of TSS Telescopic Stair Connectors & BSF Telescopic Beam Connectors.
Another topic relating to Invisible Connections will be covered as a future topic in our Academy site.
There are many good technologies available, but a dependence on local testing and local reference projects will hinder and slow down their introduction. An increased readiness to accept the certification schemes for prequalification that exist overseas such as ETA and ICC certification where appropriate, will mean that the technologies can help keep pace with the requirements of the precast industry.
Stop Compromising on Quality.
Let Us Drop You A Call For Consultation. For Free.
Related Articles You May Be Interested
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
Main Contractor: PanaHome Malaysia
Product Supplied: Moment® Half Grout Coupler
The Requirement: A mechanical connector to connect the reinforcing bars end to end, suitable for assembling precast elements.
Moment® Half Grout coupler was mounted on T16 rebar which has been threaded with JoinTec threading which makes the installation easier as the first rebar has been tightly screwed to the couplers before casting. The couplers were installed at the bottom of each precast element, are then cast as part of the precast wall panel element.
After bracing the precast panel in its final position, non-shrink grout was injected into the cavity of the coupler to create the rebar connection. Moment® Half Grout coupler requires less usage of grout and is not dependent on any specific type of grout. Different brands of grout can be used, easing local scouring and to keep the costing low. The bracing around the panel was then removed after the grout has attain the prescribed strength.
Fill In The Contact Form & Let Us Drop You A Call For A Free Consultation!
Related Articles You May Be Interested
Developer: TRX City Sdn Bhd
Contractor: Bachy Soletanche
Product Supplied: Moment® JoinTec Coupler, Moment® Bargrip Coupler
The Requirement: To connect bended rebars to micropile, which connects to the slab.
During the coupler installation of bended rebar to the casted bar of micropile, the contractor realized that the bar cannot be tighten as this bended bar needs to face a specific direction. Fortunately, our specialized engineer visited the site and assured that the tightening is not the main factor which affect the strength of the rebar connection. In fact, the engagement of the thread is the key factor which determine the strength of the connection.
R&D has been made by Halfen Moment on the percentage of thread engagement needed, hence, even if it is slightly looser, the connection will still achieve the BarBreak system. Therefore, 80% of thread engagement has always been suggested to our clients during installation to achieve the full thread engagement.
Installation of bended rebar to the casted bar of micropile with Moment® JoinTec Coupler
Related Articles You May Be Interested
Over recent years there have been some catastrophic earthquakes around the world. Therefore, it is not a surprise that Singaporean authorities are moving towards seismic design for critical structures such as Hospitals. However, it is important to highlight that designing the structures to withstand seismic actions is only part of the puzzle. In addition to the seismic actions, it is vital that the detailing of the structure, specification of the materials and selection of the products is also taken in to consideration.
In fact, some seismic tests for products are quasi static in nature and do not truly represent an actual earthquake. Therefore, additional tests such as Charpy V-Notch impact tests might also be needed to prove fitness for use in a seismic region.
In the case of a façade anchoring, where a failure can easily see a 200+kg panel falling from the side of a high rise structure, this suitability is especially critical as the current method of anchoring them to the structure usually uses cast in channels that only have high load carrying capacity in 2 axes.
With large lateral ground accelerations during an earthquake, the applied loads in the third axis (along the length of the channel) are much higher when seismic actions are considered. This has led to the development of serrated or toothed channels which have a significantly higher capacity in the third axis.
Anchor Channels are regulated in Europe under the European Assessment Document (EAD) 330008-02-06014 and designed with the standard PrEN 1992-4. In the United States of America they are tested to AC232 – Acceptance Criteria for anchor channels in Concrete5 by the Evaluation Service of the International Code Council (ICC-ES), but currently in Singapore we do not have a certification process and tend to follow the European Technical Assessments (ETAs). These documents all use the same design principles for tension and shear loads perpendicular to the longitudinal axes of the anchor channel. Since February 2016, AC232 also covers loads in the longitudinal axis of the anchor channel and includes the design for seismic conditions allowing their use in all seismic design categories (A – F) provided the channels are capable of providing resistance in all three axes. A common approach to achieve a load capacity in the longitudinal direction is to use the above mentioned serrated channels.
Serrated channels contain teeth along the inside of the channel lips and are used with channel bolts with a matching serration. The channel and bolt serrations create an interlock between the two surfaces which provides a positive connection capable of resisting shear loads in the longitudinal direction of the channel axis. Toothed Anchor Channels have been used in multiple projects worldwide including the anchoring of the curtain wall façade of the Broad Museum in Los Angeles or the Tanjong Pagar Mixed Development project which required particular attention to seismic design.
Plain anchor channels with plain T-bolts can take over longitudinal loads based on the friction between the channel and the T-bolt, but the capacity relies on the torque of the T-bolt. International standards and regulations do not allow friction based connections and thus plain anchor channels in combination with plain T-bolts cannot be used in applications that require longitudinal loading.
Anchor channels with plain and toothed lips and T-bolts
The design approach as described in AC 232 allows for a design of serrated anchor channels to provide a safe and reliable way to connect façade panels to concrete. The use of the slotted holes will still allow the adjustability required to overcome building tolerances and the absence of welding will increase safety and productivity.
Ho ho ho! As we start to warm up to the Christmas spirit, Halfen Moment Group would like to give out 20 movie tickets!
Answer 6 questions below and stand a chance to be 1 of the 10 winners to win a pair of Movie Tickets for this coming Christmas!
Question #01: What is the name of the product with number 17 placed on the Product Solutions Map of Precast Structure?
Question #02: Name 3 of 6 key drivers on why you should choose Halfen Moment as your Building Solution Provider.
Question #03: Which company in India has given Halfen Moment a testimonial on the ‘commitment towards customer needs and strong focus on ‘Lead with integrity’’?
Question #04: Which are the 5 latest developed products for precast concrete connections?
Question #05: Which product in the Precast Technology Category provides a solution for connection to foundations or for linking columns together?
Question #06: How many threads were produced by Halfen Moment for the Kahramaa, mega reservoir project?
Tips: All answers are available on www.halfen-moment.com! Hurry up!
Send your answers to firstname.lastname@example.org along with your name!
Winners will be announced on our website!
We are pleased to announce that the winners of the quiz, they are:
1) John Sim
2) Derrick Tee Kai Yang
3) Ling How Ing
4) Irene Wong Bi Xia
5) Nurul Fattiha
6) Nik Moh Shafizul
7) Gwen Loke
8) Katherine Ang
10 Mohamad Sahril
Prizes will be winging their way to you before Christmas! And for all of you who needed a bit of help, here is the Quiz Answer Sheet.
Great work everyone, Merry Christmas and wishing all of you a Happy New Year 2018!
Halfen Moment was a proud Silver Sponsor of Young Malaysians Go Classic (YMCG) II, hosted by the Malaysia Belgium Luxembourg Business Council (MBLBC), which ended successfully at Connexion @ Bangsar South on 16 November 2017.
The YMCG II, a CSR-initiative by MBLBC is all about giving the local community a chance to express themselves through music and allowing all their years of discipline and hard work to mature on a public stage. The main goal is to provide artistic exposure to local communities and future leaders.
Nearly a hundred young musicians and choir members, led by Belgian conductor Sir Dirk Brosse, brought a memorable night of music to nearly a thousand live audiences. This event was held on the occasion of the Belgian King’s Day as well as the 60th anniversary of bilateral ties between Belgium and Malaysia.
Datuk Ahmad Maslan, Vice Minister of International Trade and Industry of China, also made a speech yesterday at the opening ceremony with Belgian Ambassador Daniel Dargent and MBLBC President James De Caluwe.
Musicians brought live performances at the The Young Malaysians Go Classic II press conference held at the Belgium Ambassador’s Residence.
Jointly held seminar with IEM at Armada Hotel
Token of appreciation from IEM to the speaker, Gary Connah
With the close collaboration with IEM Malaysia, Halfen Moment Malaysia succeeded in organizing a half day seminar for the engineers from Civil and Structural Engineering Technical division. The topic conducted was focused on one of our key products, Mechanical Splices, where we presented the different types of mechanical splices available in the market, with different benefits and applications.
The speaker, Gary Connah, Managing Director of Halfen Moment Singapore covered many topics during the workshop and did an outstanding job sharing his 20 years expertise to the engineers, broadening their knowledge on how mechanical splices can play a big role in simplifying the design of reinforced concrete, speeding up construction and reducing the amount of reinforcement required.
More than 70 engineers and customers attended this seminar and Halfen Moment Malaysia would like to thank all who have attended and hope that you had a fruitful and informative session.
Stay tune for more IEM collaboration events next year, and we look forward to meeting you at our next event!
Inspiring meetings and interest from participating engineers in our products
Halfen Moment Malaysia Team
MyHSR Corp has presented the architectural concept designs for all seven stations of Kuala Lumpur-Singapore HSR in Malaysia including Bandar Malaysia, Bangi-Putrajaya, Seremban, Melaka, Muar, Batu Pahat and Iskandar Puteri. The designs of each station were conceptualised to reflect not only the diverse heritage, culture and identity of each city along the HSR corridor, but also demonstrates the growth vision that will be accomplished with the KL-SG HSR.
Bandar Malaysia- My Gateway
Bangi-Putrajaya- My People
Batu Pahat-My Culture
Iskandar Puteri-My Encounter
Source: HSR Corp
Related Articles You May Be Interested
First conceived in 2013, the Singapore-Kuala Lumpur High Speed Rail (HSR) has been four years in the making. Malaysian Prime Minister Najib Razak signed an agreement with Singapore Prime Minister Lee Hsien Loong in Putrajaya on July 19 2016. The rail project has been billed as a “game-changer” that will boost connectivity, strengthen economic ties and forge closer ties between people of both countries.
Here are 10 points to note about the HSR project:
Estimated Operational Date
The planned stations are Kuala Lumpur, Putrajaya, Seremban, Ayer Keroh, Muar, Batu Pahat, Iskandar Puteri and Jurong East. The Singapore station will be located at Jurong East, where Jurong Country Club is currently located.
350km Total Distance
Shorter Travel Time
3 Services With 2 Separate Operators
The Domestic service will consist of stations within Malaysia only, from Kuala Lumpur to Iskandar Puteri stations. Having 2 different OpCos will allow the HSR to better cater to the different needs of their passenger profiles. OpCo Domestic will also give Malaysia more flexibility to regulate its own internal service. The Express and Shuttle service will be given scheduling and operational priority over the Domestic Service.
Each Country Is In Charge Of Its Own Stations And Infrastructure
This will be undertaken by MyHSR Corporation in Malaysia and the Land Transport Authority (LTA) in Singapore.
Implementation Of A Bilateral Committee
A working-level joint project team will also handle all matters that require coordination and joint engagement between Singapore and Malaysia.
Co-located CIQ Concept (Seamless Travel)
International-bound passengers will need to go through CIQ clearance by both Singapore and Malaysia authorities only at the point of departure, ensuring swift and seamless travel.
Biggest Challenge: Line's Alignment In Malaysia
What they believe is tougher is the drafting of the tender documents and contracts before 2021, as well as the biggest challenge of finalizing the line’s alignment of the 350-kilometre long route, much of which is in Malaysia.
Round Trip Under RM400
In Singapore, prices are expected to hover around S$80-90 for a trip, though it is unclear as to whether or not said fare includes a return journey.
Related Articles You May Be Interested