Cullen Timber Engineering Connectors





General Guidelines

Technical Information

The technical information contained in this brochure is correct at the time of updating, 25 October 2012. ITW Industry reserve the right to amend, change or update the technical information without giving prior notice. For current product updates and technical information, visit our website (the “website”).

The contents of this brochure and the latest product updates posted on the website supersede all previous Cullen publications including all brochures, installation guides, manuals and information sheets.

If you would like to receive technical bulletin updates and industry news, or would like to be informed of new Cullen and other ITW Industry products coming to the market, please visit our website and enter your email address under the ‘ITW Offsite News’ banner and click ‘subscribe’.



All safe working loads are derived from tests and are underwritten by ITW Industry. All characteristic values are derived from tests carried out by independent accredited test labs (unless otherwise stated). Cullen European Technical Approvals (ETA) have been submitted for approval using British Board of Agrément (BBA) as the approved notified body.

Design Information

- The integrity of the building or structure must be validated by a suitably qualified Building Designer or Engineer (the “Designer”).

- The Designer is responsible for determining that the appropriate connector and/or hanger has been selected.

- Location and spacing of straps must be specified by the Designer.

- When selecting the appropriate connector and/or hanger, consideration must be given to the safe working loads or

characteristic capacities required, bearing support and connection details within the building or structure.

- ITW Industry reserve the right to (i) change the design specifications and applications of any connector/hanger, or (ii)



withdraw any connector or hanger without giving prior notice. - For all Engineered Wood Products (EWP), ITW Industry recommends the hanger height be at least 60% of the joist height

for lateral stability.

- For custom design services please refer to page 14.

- Any bespoke Cullen product designed by ITW Industry but manufactured by another (unless directed to by ITW Industry)

will not be covered under ITW Industry‘s warranty.

NB. Any modification to any Cullen custom-made or manufactured connector and/or hanger product will void any warranty given by Cullen in relation to that particular connector and/or hanger product.

General Installation Information

- Proper product installation and construction practices must be followed at all times.

- Timber members and Engineered Wood Products may split when nailed; this may reduce their safe working load/



characteristic capacity. - To achieve the safe working loads/characteristic capacities published all specified nails and fastenings must be used and

installed as per the instructions set out in this brochure.

- Failure to follow proper nailing procedures and instructions will reduce the safe working loads/characteristic capacities.

- Only bend Cullen connectors when directed to by the appropriate Cullen installation guide, and when necessary “only

bend once”.

Steel Information

GALVANISED PROTECTION

Z275 galvanised coating is the minimum corrosion protection recommended in structural applications for use with untreated wood in many interior and exterior dry conditions.

Z600 galvanised coating gives greater corrosion protection with some treated wood applications and service environments.

Stainless steel fasteners must NOT be used with galvanised connections.

STAINLESS STEEL

Stainless steel provides the highest level of corrosion protection for certain exterior applications and timber treatments. The treatment given to the timber may contain chemical elements that could cause a corrosive reaction to our connectors and specified fasteners, in this case the wood treatment supplier should provide data sheets and recommendations of a compatible connector-coating product. If there is any doubt we recommend the use of stainless steel connectors and fasteners.


NB.

1. Stainless steel fasteners must be used with stainless steel connections.

2. Stainless steel fasteners do not have the same withdrawal capacity as regular nails. Safe working loads/characteristic

capacities of stainless steel connectors are available on request from ITW Industry.

Galvanised fasteners must NOT be used with stainless steel connections.


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