J&P Building Systems Ltd - An Introduction

53
J&P Building Systems Ltd Introduction

Transcript of J&P Building Systems Ltd - An Introduction

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J&P Building Systems Ltd

Introduction

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With an extensive range of products for many of today’s modern construction requirements, J & P Building Systems have developed a reputation for providing safe, smart solutions.

Supplying standard off-the-shelf products and bespoke designed solutions, J&P work closely with our parent companies to provide cost-effective, high quality and reliable products to benefit the construction industry.

Alongside our range of products we also have an experienced team providing design guidance, technical support, sales and pricing assistance – to ensure our customers are supplied the most suitable value-engineered products and solutions for their projects.

J&P Building Systems

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J&P Parent Partnership Companies

J&P Building Systems is the supply partner in the UK for our parent companies

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Balcon connectors for steel balconies

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Steel balconies are a common feature of apartments

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They are normally fixed to the face of the insitu concrete floor slab

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Until recently, proprietary fixing systems were always used

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Typical proprietary balcony fixing inserts

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Apart from cost, the big drawback with these systems is tolerance

-or lack of it

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Extract from proprietary technical literature

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The lack of tolerance means that surveys and retro-drilling is usually required

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Threaded rods projecting from slab edge

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Threaded sockets cast into slab edge

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Balcon channel inserts

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Cast-in channel has always been known to offer high tolerance

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Invented by Anders Jordahl in 1913, it has a proven track record of safety and provision of high tolerance.

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In particular, channel allows considerable errors in casting to be overcome with no remedial work required.

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Ideal position for channel and balcony plate

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Channel to one side - plate remains in correct position

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Channel too high - plate remains in correct position

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Channel rotated - plate remains in correct position

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Balcon system

The channels are cast-in, with bars welded-on.The stub and back plate normally form part of the balcony package

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How does it work?

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How does it work?

Shear is taken by the vertical toothed channels

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How does it work?

Moment is taken by tension in the top channel and compression against the vertical channels

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Thermal performance

The stub beam can be encased in a block of insulation.The thickness of insulation is not ‘fixed’ as with the proprietary systems.

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Thermal performance

The Balcon system has been thermally assessed by BBA.

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Thermal performance

The results showed that Balcon was thermally superior to existing proprietary systems.

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Thermal performance

Importantly, the analysis showed that the performance meet the criteria for minimising the risk of internal surface condensation.

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Durability

The channels and bolts have a hot-dipped galvanized finish. The minimum thickness of galvanizing is 50μm (microns).

The Galvanizers Association publish guidance based on BS EN ISO 14713:2009

This indicates a coating life expectancy of at least 70 years.

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Practical details

BBC Media City

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Practical details

BBC Media City

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Practical details

BBC Media City

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Practical details

Clancy Barracks, Dublin

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Balcon Case studies

Woodberry Down

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Balcon Case studies

BBC Media City

Media City

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Balcon Case studies

The Rock, Bury

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Balcon Case studies

Clancy Barracks, Dublin

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Balcon Case studies

Beaufort Park, Hendon

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Balcon Case studies

Kew Bridge Road, Brentford

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Balcon Case studies

Finzels Reach, Bristol

Finzels Reach, Bristol

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Balcon Case studies

Finzels Reach, Bristol

Finzels Reach, Bristol

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Balcon Case studies

Olympic Athletes Village (3 sites)

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In addition:

Cast-in channels are remarkably tolerant of mis-use and abuse, as these examples show.

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Channel not secured before casting has sunk below the surface of the concrete.

Concrete is highly honeycombed

Used after load testing.

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After this channel was missed out, the Contractor cut a chase in the column and ‘fixed’ a channel with resin.

Rejected!

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After this channel was mis-positioned, the Contractor added another, with resin.

Rejected!

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The missing concrete was replaced with grout.

Used after load testing.

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This group was severely mis-aligned, and the lower surface was set back.

After load testing, this was used as designed with a modified end plate to the beam.

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Inappropriate use of an oxyacetylene burner damaged the galvanizing. Concrete was blown off by the extreme heat.

After making-good, and load testing, this was used as designed.

Load = 70 kNm + 100 kN

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J&P Building Systems LtdThame Forty Jane Morbey Road

Thame Oxon OX9 3RRT: +44 (0)1844 215 200 F: +44 (0)1844 263 257

E: [email protected]: jp-uk.com

GENERAL

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