Macalloy Tension Bars

Macalloy's lighter carbon and stainless bars are used in lightweight canopies, facades and suspended structures. The high strength bars provide support for bridge decks, in bolstering bridges the good fatigue properties of the bar are an important design feature in road, tram and pedestrian bridges alike. Benefits

Fatigue resistant rolled thread
Available in 460N/mm2, 520N/mm2 and now a 550N/mm2 strength for both carbon and stainless
All products compliant with ETA21/0053 and CE compliant
Bars and fittings can be supplied primed or painted and/or hot dipped galvanised to BS1461:2009
Bespoke fittings can be designed to suit customer applications
Technical literature is available with design calculations and loadings to EC3
Macalloy engineers are always available to help

Min. Yield Load

1 kN

Design Resistance to EC3 N_R_,_d

1 kN

Assembly and installation

For both pre-assembled and non-assembled tendons please follow the assembly and installation instructions to ensure correct set up points and thread engagement.

Figure:

Assembly and installation

To ensure full strength of threaded joints a minimum of 1 x thread diameter should be engaged in fork/turnbuckle joints. Where large loads need to be induced in a tension bar the Macalloy TechnoTensioner can be used. See page 7 for more information. Spanner flats available on request on bars and turnbuckles, please specify at time of order.

Material properties

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Tendon capacities

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Maximum length of individual bars

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Corrosion protection

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Fork adjustment and set up points

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Fork adjustment and set up points

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Turnbuckle adjustment and set up points

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Turnbuckle adjustment and set up points

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Fork and Lock Cover Sealing

Recommended for use with all finishes to protect against vibration and corrosion. The same method should be applied whether used with a fork, coupler or turnbuckle.

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Fork and Lock Cover Sealing

Fork and Lockcover sealing method statements are availble on request. If no lock cover is used, contact Macalloy for sealing methods.

Fork / Gusset Plate Misalignment

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Fork / Gusset Plate Misalignment

The standard Macalloy fork allows for misalignment between gusset plates of up to 0.5 degrees. Where greater adjustment is required or there is potential movement exceeding 0.5 degrees, larger forks can be put on the bar or strut and a spherical bearing can be inserted providing up to 5.9 degrees of misalignment / movement.

Figure:

Fork / Gusset Plate Misalignment

TechnoTensioner

The Macalloy TechnoTensioner allows you to induce an accurate load into Macalloy tendons where a turnbuckle is used. The Macalloy TechnoTensioner works by gripping the tension bar on either side of the turnbuckle and pulling the bars together into tension thus loosening the turnbuckle. The turnbuckle can then be tightened with a strap, chain or stilson wrench.

Figure:

TechnoTensioner

Components

Connection solution

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Disc connection

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Fork

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Fork

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Spade

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Spade

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Architectural Pin

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Architectural Pin

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Hex Nuts Units

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Hex Nuts Units

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Turnbuckle

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Turnbuckle

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Coupler

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Coupler

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Fork & Coupler Lock Covers

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Fork & Coupler Lock Covers

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Universal Lock Covers

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Universal Lock Covers

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