Punching Shear Reinforcement
12Pages

Technical Approval unching Shear

Shearfix Punching Shear Reinforcement The weight of a slab supported on a column induces shear stresses in the slab. These stresses, if sufficient and where additional reinforcement has not been provided, would result in the column ‘punching’ through the slab. This punching shear is similarly induced in the footing on which the column bears. Although punching shear can be relieved by localised thickening of the concrete with downstand beams and enlarged column heads, the construction of flat slabs offers many advantages. A consistent head space can reduce the overall height of a building...

Full material In-house, traceable batch testing technical support '• Rounded rail ends In-house manufacture from CARES-approved

Shearfix Punching Shear Reinforcement Ancon Shearfix Used within a slab to provide additional reinforcement around columns, Ancon Shearfix is the ideal solution to the design and construction problems associated with punching shear. The system consists of double-headed studs welded to flat rails, positioned around the column head or base. The shear load from the slab is transferred through the studs into the column. Shearfix is suitable for all column shapes and is easy to install either ‘top down’ or ‘bottom up’, depending on user preference. Technical Approval Shearfix has been evaluated...

System Components The Ancon Shearfix system comprises double-headed studs welded to flat rails. It is manufactured to suit the specific requirements of each application. The quantity of each component, the dimensions and spacings, and the layout pattern around the column are determined by calculation. Ancon provides free software to determine the optimum system design (see pages 6-7). Shearfix Studs Studs are manufactured in five diameters (10, 12, 16, 20 and 25mm) from CARES-approved B500C reinforcing bar. The heads are hot forged to three times the diameter of the bar. Studs are...

Shearfix Punching Shear Reinforcement Design Information: BS EN 1992-1-1:2004 The design of punching shear reinforcement should be carried out in accordance with the recommendations contained in BS EN 1992-1-1:2004. Shearfix designed to BS EN 1992 can also be applied to structures designed to BS 8110. The shear stress in the concrete is calculated at the column face and at the basic control perimeter (2d from the column face) to determine whether punching shear reinforcement is required. If reinforcement is required, the position of the outer control perimeter at which shear reinforcement...

Design Program Shearfix is designed to suit the specific requirements of each application. Ancon provides a free design program to simplify This easy-to-use program allows the optimum system design to be determined and generates a printable data sheet and a DXF file of the specified layout. Solutions can be created for all column sizes, shapes and locations including columns offset from edges The program allows analysis to BS EN 1992 Where there are openings close to the column, a section of the slab will be ineffective and perimeters will need to be reduced; the Ancon design program allows...

Shearfix Punching Shear Reinforcement Design and Technical Support In addition to the Shearfix design program shown on page 7, Ancon’s Technical Services Team offers free design and technical support. A design sheet is available which allows engineers to summarise the critical details of their project and request technical assistance with a Shearfix design. This form is shown on page 9. Guidance for Completion of BS EN 1992 (EC2) Design Sheet To ensure we receive all necessary design information Ancon requires the design information for each column to be compiled together. Unfortunately we...

Rail Layout (tick one) Concrete cover bottom Column Type (A1, A2...) (see below) Ancon Building Products, President Way, President Park, Sheffield S4 7UR, United Kingdom. Tel: +44 (0) 114 275 5224, Web: www.ancon.co.uk Faxback to +44 (0) 114 276 8543 or email: tech@ancon.co.uk Column Type Void Position and Size y Voids (mm) Reinforcement (Please supply drawings in direction to clarify positions of voids) z Size Position bar Ø spacing vy vz y z * Maximum 3 x effective depth. ** Mz moments act in the columns y direction i.e. horizontally across the columns when orientated as shown below....

Shearfix Punching Shear Reinforcement Typical Rail Arrangements Shearfix is suitable for all column shapes and locations. Some typical arrangements are shown here. Radial Layouts Orthogonal Layouts Installation Procedure Ancon Shearfix is quick and simple to install. It can be fitted either ‘top down’ (after all other reinforcement) or ‘bottom up’ (prior to other reinforcement). ‘Top down’ Fixing • Fix all main reinforcement in position Place Shearfix rails around the column to the layout detailed on job drawings by passing the studs through the reinforcement grid and resting the carrier...

Other Ancon Products Reinforcing Bar Couplers The use of reinforcing bar couplers can provide significant advantages over lapped joints. Design and construction of the concrete can be simplified and the amount of reinforcement required can be reduced. The Ancon range includes parallel threaded, tapered threaded and mechanically bolted couplers. Photo: University of Derby Reinforcement Continuity Systems Reinforcement Continuity Systems are an increasingly popular means of maintaining continuity of reinforcement at construction joints in concrete. Ancon Eazistrip is approved by UK CARES and...

Masonry Support Systems 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 Reinforcement Continuity Systems Stainless Steel Fabrications Flooring and Formed Sections Refractory Fixings Ancon Building Products President Way, President Park Sheffield S4 7UR United Kingdom Tel: +44 (0) 114 275 5224 Fax: +44 (0) 114 276 8543 Email: info@ancon.co.uk Visit: www.ancon.co.uk Follow on Twitter:...