Nathani Heights is a 72-storeys skycrapper in Mumbai. With a total height of 262 meters it is among the 30 tallest building in the city. The construction of the building started in 2012 and will be completed in 2018.

For this project, Dextra supplied its famous Bartec rebar coupler solution. Bartec is the main rebar coupler solutions in India, satisfying all technical requirements even in seismic areas.

As in other highrise building, rebar couplers have been used for large diameter rebar connection in vertical applications such as columns and corewalls (bar to bar vertical connection).

Rebar couplers were also used for slab connections. In that case, the coupler is pre-positionner flush with formwork (allowing climbing formwork to go up). After casting, a threaded rebar is simply screwed inside the coupler to create the starter bar.

Business Garden Bucharest is a modern mixed used class A office complex. It features retail spaces, pairing with commercial and public services on the ground level. The name Business Garden stems from its integrated spacious green area, a garden connecting the buildings with designated recreation spaces. Generous lawn area, pedestrian pathways, and benches with free Wi-Fi are provided to invite the office goers to work or take a refreshing break outside. The complex is LEED Platinum pre-certified. To support the tenant’s everyday life needs of their employees, Business Garden Bucharest’s offices are designed to have efficient layout, built with high quality finishes and sustainable solutions that are in line with LEED Platinum green certifications.

For this project, Dextra was involved in the supply of its Fortec rebar coupler solution. The Fortec solution is made up of a standard rebar coupler that can be utilize as both standard and position splices connecting two rebar ends that have been previously enlarged and threaded. Fortec is especially suitable for seismic environment construction, which is the case of buildings in the Bucharest area.

Fortec couplers have been used to provide superstructure vertical connections. Fortec couplers are relatively compact and can help to reduce the congestion created from rebar lapping. Fortec couplers also provided temporary opening, allowing movement of the workers and equipment around the reinforcement. Before casting, the continuation bars are simply connecting to the couplers, filling the temporary opening gap.

London Wall Place is large a double tower office development in London built close to the Roman City Wall historical monument.

For this project, Dextra offered contractor Byrne Bros and main consultant WSP a technical solution for the fast installation of precast wall panels.

The concept was to install Groutec couplers in each panel reinforcement, at the bottom of the vertical bars previously prepared with Rolltec thread system, available in the UK through our distributor network.

After bracing the precast panel in its final position, non-shrink grout is injected into the cavity of the coupler, in order to create the rebar connection. Groutec is not reliant on a specific type of grout. Rather, several different brands of grout can be used, facilitating local scouring and helping to keep costs low. The bracing around the panel is then removed after the grout has achieve a prescribed strength.

After straightening and bracing of the precast panel, non-shrink grout is inserted into the cavity by injection. Dextra does not supply grout as Groutec is by design compatible with several brands that can be sourced locally, generating savings and easing project management.After injection, the bracing around the precast panel may then be removed after only 3 days.

The use of Groutec for precast panel is a time-saving and economical way to quickly take advantage of the precast technology. For similar application video, please check The Plum Central Station project page.

Icon Siam complex, located on the right bank of the Chao Phraya river in the West of Bangkok, is a new multipurpose commercial/residential complex consisting of two highrise buildings and a shopping mall. This new massive project aims to give back its glamour to the banks of the Chao Praya river.

The two towers are expected to reach 280m (SuperLux Tower) and 315m (Magnolia Tower) respectively. The Magnolia Tower will thus be slightly taller than the MahaNakhon Tower, Bangkok’s tallest building since 2015.

Dextra is supplying Thai-Obayashi (contractor of the shopping mall structure) and Italian-Thai (contractor of both towers) with its Bartec rebar splicing solution.

Dextra engineers performed operator trainings and do preventive maintenance directly on site to guarantee maximum output in thread production.

In total, more than 800,000 Bartec rebar couplers and 20,000 Bartec Headed Bars are being used in foundations and superstructure in the following applications:

L-shaped dowel bars (wall-slab connections)

This is a typical application used in foundation D-Walls to avoid protruding rebar. it is also used in the superstructure to allow the sliding formwork to climb up without any disturbance

Substitution of hooked bars with end anchors

When the wall reinforcement is especially congested, the use of Headed Bars (also called end anchors) allows to anchor the reinforcement in the wall without the need to produce hooks.

Double-ended connection in shear-walls

This solution allows to create a continuity inside the column or wall by bridging two horizontal slabs or beams.

Welded couplers for composite structures

Sometimes it is necessary to start reinforcement from the steel structure. In that case, weldable couplers are the ideal solution: Made of a low-carbon steel, they can be welded easily and allow connection to a threaded rebar.

Landmark 81 is a new highrise tower project located on the bank of the Saigon river in Ho Chi Minh City. The project is owned by Vietnamese company Vingroup.

The tower, whose construction started end of 2014, is expected to reach the height of 462 meters, a new height record in Vietnam. Landmark 81 will the 11th tallest tower building in the world.

For this project, Dextra is supplying its renowned
Bartec solution to contractor Coteccons. Bartec solution has been approved by ARUP, owner’s representative consultant, and MACE International, structural consultant.

In total, 250,000 Bartec couplers will be used for vertical rebar connection in the corewall and columns as well as for horitonzal applications such as corewall-to-beam and corewall-to-slab connections.

The use of rebar couplers allows the climbing ormwork to move its way up unencumbered as well as connect slabs starting bars in a very productive manner. Those technologies combined with state-of-the-art concrete monitoring allow very fast construction cycles as short as 35 hours per floor.

For composite applications (steel columns to beams), Dextra also supplied 20,000 weldables couplers.

Example of weldable Bartec coupler on beam

The fast-paced construction site is supported by three sets of Dextra Bartec equipment, installed directly on site. The equipment is maintained by Dextra and operated by Dextra’s distributor in Vietnam, Lotus Greentech.

Concrete works were completed ahead of schedule early 2018.

ONE Limassol Tower is a commercial building and a new landmark of Limassol, Cyprus. The project aims to position the island on the international luxury property market, enhancing the attractiveness of the country for foreign investment by offering world-class residence, amenities and services. This will also boost Cyprus’ economy, while increasing local employment opportunities.

At 170 meters above ground with 33 storeys in total, the ONE Limassol Tower is the tallest seafront residential project in Europe. The building will host 83 luxurious apartments, including a three-storey penthouse.

For the reinforcement of this landmark building, Dextra delivered its rebar couplers and bar-end preparation machine sets to the contractor J&P and ACC JV, which is a joint-venture between Joannou & Paraskevaides Group (J&P) and Arabian Construction Company (ACC).

More than 60,000 Bartec couplers were used for rebar splicing in rafts and vertical parts of the building.

The completion of this iconic project is scheduled in 2019.

The new headquarters building of the National Bank of Kuwait is a 300m-tall tower that covers a total floor area of 127,000m2 with a design concept inspired by pearl shells and located in the heart of Kuwait City’s financial district.

The main construction comprises composite concrete and steel, while the cladding on the fins and glass façades is predominantly glass-reinforced concrete.

Dextra took part in reinforcing the concrete structure of the building by providing these solutions: