HALFEN LTD
2 HUMPHRYS ROAD
WOODSIDE ESTATE
DUNSTABLE
BEDFORDSHIRE LU5 4TP
Tel: 08705 316300
Fax: 08705 316304
Suppliers of: Brickwork support systems, cast-in channels, cast in channels, cast-in anchors, stainless steel fixings, stainless steel wall ties, balcony connection systems, tension rod systems, framing systems, reinforcement couplers
Halfen has been providing fixing, support and restraint, reinforcement and lifting systems to the UK construction industry for more than 30 years.
Our product ranges have achieved an excellent reputation for providing cost-effective and reliable solutions to the requirements of modern building and construction.
Our Main Product Ranges include:
Cast-in channels:
Halfen cast-in channels are a range of rolled steel profiles designed to provide secure fixings into concrete.
Other products include Corner Guards, Pourstops & Skis.
Brickwork supports:
Halfen now supply the HK4 standard pre-designed brickwork support bracket system.
Stone Support & Restraints:
Halfen manufacture a range of stone support and restraint systems ideally suited for todays cladding requirements.
Brickwork Ties & Restraints:
The range includes cavity ties, frame cramps, brick tie channels, insulation retaining disks, and sliding brick anchors. In addition to the standard ranges, products are also manufactured to special requirements.
DETAN Tension Rod System:
The DETAN Tension Rod System is an aesthetically pleasing method of providing bracing, structural support or simply an architectural feature. The DETAN system is manufactured from both carbon steel and stainless steel in a variety of sizes.
Wind Posts:
Halfen windposts have been specifically designed to strengthen masonry panels.
Rebar Couplers:
Socket bars are formed by swaging high strength collars on to reinforcement bars and are available in any length up to 6 metres. They are fixed to the formwork via nailing plates or standard metric bolts. Connector bars are hot forged and are available in stock sizes for screwing into the socket bar.
CRET Shear Dowel Connectors:
Halfen CRET is a high load shear connector system to support floor slabs at movement joints.
Kwikastrip - reinforcement continuity strip:
A time-saving and cost-effective method of maintaining reinforcement continuity across construction joints in concrete.
Column Shoe HCC:
The system consists of HCC column shoes in precast concrete columns and the corresponding HAB anchor bolts which are concreted into the foundations on site.
Punching shear reinforcement:
The Halfen HDB punching shear reinforcement system comprises high strength reinforcing steel bars.
HFR Fibre Reinforcement:
HALFEN HFR Glass Fibre Reinforced Polymer composites have approximately twice the strength of regular reinforcement steel, but only one third of its weight.
HIT balcony connection system:
Halfens HIT can provide a solution to the architectural and engineering problem of creating a thermal break whilst still providing a structural connection.
Powerclick systems:
Designed to provide mechanical and structural engineers with an alternative to conventional structural steel for both beams and columns, the system has all the versatility of Halfen channel and T-head bolts but encapsulated in a heavy-duty box section.
Pipe clamps:
Halfen Pipe Clamps are well suited for fittings in combination with Halfen Framing Systems.
Plain back channels:
A range of plain-back channel and T-head bolts which enables fast and simple construction of framing systems for various applications, including pipe supports.
Cantilever brackets:
Fabricated from conventional Halfen framing channels, they offer the same advantages of rapid, safe and adjustable installation.
Rapid safety lift systems:
The FRIMEDA Rapid Lift System is a safe, easily handled system, with the added benefit that it can be readily established visually whether or not the system is operational.
Precast panel supports:
A support system for concrete cladding panels that, by suspending panels, enables stress-free expansion resulting from temperature change.
Threaded lifting system:
Threaded Lifting loops can be used with all sizes of threaded inserts. They are the most economic lifting loop and are suitable for most applications, particularly site operations.
Precast sandwich panel system:
The SPA Anchor System safely connects the various layers and transfers the load of the external facing panel to the internal load bearing panel and supporting structure.
Cast-in hoop lifting system:
Cast-in wire rope lifting hoops are the most economic way of providing a crane hook attachment in precast units.
These files are provided by the manufacturer. While Building Products Index takes every care to ensure the information is correct and up to date, we cannot be held liable for any out of date or incorrect information in them. You should check with before specifying or purchasing products.
Brickwork Support, Ties and Windposts
Published [30/01/12]File size [3680 KB]
Construction solutions for fixing, support and restraint, reinforcement and lifting
Published [30/01/12]File size [2357 KB]
DEHA Lifting Anchor System
Published [30/01/12]File size [4256 KB]
Frimeda Lifting Anchor System
Published [30/01/12]File size [4641 KB]
Halfen Cast-In Channel Fixings
Published [30/01/12]File size [4415 KB]
Halfen Column Shoe
Published [30/01/12]File size [2012 KB]
Halfen Cret Shear Load Connectors
Published [30/01/12]File size [5059 KB]
Halfen Framing Channels & Accessories
Published [30/01/12]File size [4789 KB]
Halfen HFR Fibre Reinforcement
Published [30/01/12]File size [701 KB]
Halfen HIT Insulated Connection
Published [30/01/12]File size [10443 KB]
Halfen Kwikastrip reinforcement continuity strip
Published [30/01/12]File size [4937 KB]
Halfen Precast Panel Anchor Supports
Published [30/01/12]File size [1540 KB]
Halfen Punching Shear Reinforcement
Published [30/01/12]File size [3129 KB]
HBM Reinforcement Couplers
Published [30/01/12]File size [1288 KB]
Metal Deck and Cast In Channels
Published [30/01/12]File size [218 KB]
Natural Stone Support Systems
Published [30/01/12]File size [3880 KB]
Precast Lifting and Fixing Systems
Published [30/01/12]File size [3102 KB]
SPA Sandwich Panel Anchors
Published [30/01/12]File size [2723 KB]
Renaissance at Loampit Vale, Lewisham, London
January 2012
Renaissance at Loampit Vale, Lewisham, London
Paul Hitchins of Halfen looks at a regeneration development in Lewisham that has benefited from the new generation of HIT balcony connectors to help achieve impressive sustainability credentials.
Lewisham has undergone significant regeneration in recent years and as part of the ongoing improvements Barratt London was selected by Lewisham Council as their partner in conjunction with London & Quadrant Housing Trust to develop proposals for the site at Loampit Vale.
Following discussions with local residents and key statutory bodies such as the Greater London Authority and CABE, planning permission was granted in September 2009, and construction started on site in April 2010, with the site due to be completed by June 2015.
The proposals for Renaissance embrace 21st Century urban living and will deliver an exciting mixed-use development including a new leisure centre which will achieve BREEAM ‘Excellent’ standard. In addition, 788 new homes are under construction of which 149 are affordable, achieving Code 4 of the Code for Sustainable Homes. In addition public spaces and open piazzas coupled with an energy centre, green roofs and access to mainline rail services highlight the development’s sustainable credentials.
As part of that commitment one of the challenges facing the design team of Assael Architecture and Adams Kara Taylor included the need to meet stringent levels of thermal performance for the many balconies whilst maintaining elegance of design and ease of construction. Structural thermal bridges such as at balconies may lead to moisture problems resulting from decreased temperatures on internal surfaces as well as loss of heat. A thermally insulated balcony connector would reduce the transmission heat losses in the area of the connections and prevent condensation and mould growth. In addition, the design team’s requirement for F120 fire rating meant that a traditional thermal break would require extra fire protection.
Halfen worked with the design team and Barratt London to provide solutions to these and other issues using the new generation of Halfen HIT insulated connectors incorporating innovative CSB technology.
The CSB technology combines the shear and compression components of the thermal break into one thus eliminating costly stainless steel shear rails and yet providing 55% more shear capacity. This has a dramatic effect as far as transportation and installation is concerned and provided a key benefit to the construction team at Loampit Vale when it came to the curved cantilevered balconies that are the highlight of the frontage. At these locations, where the internal reinforced concrete slab drops from 250mm down to the balcony slab at 200mm, Halfen were able to adjust the bar heights given the relatively low numbers of bars required, so that the faceted units could overlap providing the required radius whilst maintaining the continuous thermal break.
The concrete installation team from Masterson Holdings were able to rapidly install the insulated connector units in conjunction with the required reinforcement from above without having to cut through transportation bars and with fewer projecting bars to cause potential clashes. With produced lengths of 25,50 and 100cm cutting to size on site could be avoided with the unit locations pre planned. Barratt project engineer Hardik Bhatt commented that the installation was quick and simple providing a major saving in time.
Once installed, the HIT insulated connectors are providing the design team with unparalleled levels of thermal performance. With the removal of shear bars that run from the balcony to the internal structure the new CSB units provide a 37% lower linear thermal transmission coefficient than other thermal breaks with the provision for the engineer of a detailed verification of the additional value for thermal bridges.
In addition the requirement for F120 fire rating is accommodated as standard in the new HIT design as part of the robust body construction. This means that the design team has been able to avoid costly additional fire protection in areas where the thermal break is applied with confidence knowing that the load bearing elements of the units are fully insulated.
Halfen have also been able to address another of the issues associated with balconies and access balconies which is the transfer of vibration into the main structure of the building and distribution into adjacent rooms as airborne sound. In laboratory experiments the HIT thermal separation significantly reduces the impact sound pressure level in comparison to a continuous floor slab by up to 12dB(1)
The design team were able to rest assured that the Halfen HIT CSB insulated connectors were compliant with the most stringent standards. The requirement described in BRE IP1/06 which is cited in Building Regulations Approved Documents Part L1 and L2 and Section 6 in Scotland is that the temperature factor used to indicate condensation risk must be greater than or equal to 0.75 for dwellings and residential buildings. With a range of 0.868 – 0.942(2) this is easily met by the HIT CSB range.
The fire protecting properties were verified by the Institute for Materials Research and Testing MFPA Leipzig. The classification of the entire structure in fire resistance class REI 120 according to DIN EN 13501-02 or in class F120 according to DIN 4102 is specified in the National Technical Approval Z-15.7-293.
Halfen HIT design programs provide verifiable structural calculations using the geometry of the balcony and the constraints regarding concrete cover and fire protection. This calculates the correct HIT unit that has been type tested and officially approved by the German Institute of Construction Engineering. All approvals for individual cases within the framework of the National Technical Approval Z-15.7-238 or Z-15.7-293 are also provided. This is part of the Halfen integrated safety concept and is complemented by NHBC acceptance in the UK.
Halfen at Ecobuild
January 2012
Halfen Group will be at Ecobuild at London Excel from Tuesday 20th March to Thursday 22nd March 2012.
Find us at Stand: N1562
We look forward to seeing you there
