Wall Ties and Restraint Fixings
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CI/SfB (21.9) xt6 May 2011 Wall Ties and Restraint Fixings nstruction Industry Ancon BUILDING PRODUCTS

Ancon designs and manufactures high integrity steel products for the construction industry. Through continuous programmes of new product development, inward investment and employee advancement, the company is committed to maintaining the highest level of customer service within a dynamic and challenging industry. Masonry Support System Lintels Masonry Reinforcement Windposts and Parapet Posts Wall Ties and Restraint Fixings Channel and Bolt Fixings Tension and Compression Systems Insulated Balcony Connectors Shear Load Connectors Punching Shear Reinforcement Reinforcing Bar Couplers...

WaLL Ties and Restraint Fixings CAVITY WALL TIE SELECTION The slection and spacing of wall ties dpend on many factors. These include type of masonry to be tied, cavity width, type and height of building, location, and design life. There are several documents which need to be consulted and are summarised here. Eurocode 6 - Design of Masonry S Structures (BS EN 1996-1-1: 2005) 2 In 2010, Eurocode 6 became the main code § for the design of reinforced and unreinforced o "o" masonry. Eurocode 6 refers to EN 845-1 for ® wall ties and sets the density of ties per square 1 metre based on the...

Tel: +44 (0) 114 275 5224 Web: www.ancon.co.uk Minimum Requirements for Wall Ties to PD 6697: 2010 (Table 12) and BS 5268-6.1: 1996 (Annex B) Minimum Mortar Class and Designation Tensile Load Capacity (N) Compressive Load Capacity (N) 1 M12 (i) M2 (iv) 5000 2500 5000 2500 2 M2 (iv) 1800 1300 3 M2 (iv) 1100 800 4 M2 (iv) 650 450 5 M4 (iii) 600 425 6 M4 (iii) 630 440 7 M4 (iii) To be declared by the Wall Tie Manufacturer Masonry-to-Masonry Wall Tie Types to PD 6697 Type Application Density : 2010 Maximum Building Height Geographical Location Type 1 Heavy duty tie suitable for most building...

WaLL Ties and Restraint Fixings Density & Positioning of Ties PD 6697: 2010 recommends that for walls in which both leaves are 90mm or thicker, ties should be used at not less than 2.5 per square metre (900mm horizontal x 450mm vertical centres). Ties should be evenly distributed over the wall area, except around openings, and should preferably be staggered. At vertical edges of an opening, unreturned or unbonded edges, and vertical expansion joints, additional ties should be used at a rate of one per 300mm height, located not more than 225mm from the edge. A typical layout is shown below....

Tel: +44 (0) 114 275 5224 Web: www.ancon.co.uk INSTALLATION GUIDANCE Wall ties are important to the stability of masonry and failure to install them correctly may lead to damp penetration, cracking or even the collapse of walls. Wall ties should be pressed down in fresh mortar. They should be surrounded by mortar and not simply positioned directly onto masonry with mortar placed around them. Ideally, ties should be installed with a slight fall to the outer leaf, not towards the inner leaf as this could provide a path for moisture to cross the cavity. The drip part of the tie should point...

8 WALL TIES TO PD 6697 FOR BRICK-TO-BLOCK CONSTRUCTION Ancon ST1 Type 1 Tie (Masonry Heavy Duty) The Ancon ST1 is suitable for cavities from 50mm to 175mm and can be used for all types of buildings of any height, anywhere in the British Isles. The section that spans the cavity has a series of holes to provide water drips. The ST1 has a measured dynamic stiffness of <113MN/m3 that meets the performance requirement of Approved Document E for use in external masonry walls. For internal separating walls of new-build attached dwellings see HRT4. Staifix RT2 Type 2 Tie (Masonry General Purpose)...

Tel: +44 (0) 114 275 5224 Web: www.ancon.co.uk Ancon TeploTie The Ancon TeploTie is suitable for cavities from 50mm to 300mm and is manufactured from pultruded basalt fibres set in an epoxy resin. This material has a thermal conductivity of only 0.7W/mK which can be shown in U-value calculations to reduce insulation thickness and wall footprint. A sand finish provides excellent mortar key. The Ancon range of TeploTies comprises Teplo1 (Type 1), Teplo2 (Type 2) and Teplo4 (Type 4). Please refer to page 5 for further details on the suitability of each wall tie. Due only to the testing...

Wall Ties and Restraint Fixings TIES FOR CAVITIES OVER 150MM Ancon Two-Part Tie Cavities exceeding 150mm are sometimes required. This necessitates longer ties which can be difficult to balance and keep horizontal when built into the inner leaf. Alternatively, the Ancon Two-Part Tie has one section built into the blockwork; the other section is then fixed as the outer leaf is built. An embedment of 75mm is required at each end. The inner tie is usually manufactured in lengths of 170mm with variation in the cavity width being accommodated by the length of the outer section. Where insulation...

Tel: +44 (0) 114 275 5224 Web: www.ancon.co.uk TIES FOR STEEL STUDWORK Ancon 25/14 Restraint System The Ancon 25/14 system is designed to tie brickwork to steel studding. Self-drilling screws fix through the channel and the rigid insulation board, into the steel. Once the channel is installed, Ancon SD25 wall ties can be positioned at any point along its length and are built into the bed joints of the outer leaf of brickwork. The spacing of ties is based on the height of the building and its geographical location. This system has a performance in excess of Type 3 and the table below should...

Wall Ties and Restraint Fixings TIES FOR THIN-JOINT BLOCKWORK TJ2 to PD 6697 Staifix-Thor Helical TJ2 Wall Tie The TJ2 wall tie hammers directly into aerated concrte blocks, through insulation material, and is built into the bed joints of the outer leaf of brickwork. It is ideal for thin-joint blockwork and other applications where the joints in the inner and outer leaves are not aligned. This tie meets the requirements of the NHBC and PD 6697 as a type 2, 3 or 4 wall tie depending on the block used and the cavity width. Tools are available to simplify installation. The helix of the...