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Understanding Seismic Bracing when it comes to your Designs

FDG are more than just suppliers of HVAC, Plumbing and Electrical support systems and accessories, we know that a key part of product installation requires an understanding and involvement in the upfront design process.

We have partnered with the team at BVT Engineering Professional Services (BVT) who are experts in the field of Interior Engineering. To help give a better understanding of Seismic bracing, they have put together information that clearly lays out the Bracing Guidelines.

To do this they have taken the hundreds of pages of Engineering specifications, that make up the NZ Standard 4219:2009 and have put it in an easy to digest format. Have a read and then give us a call when you are in the planning phase of your next project, to get the right design and product to bring it all together.

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Piping Systems

While all services must be ‘seismically restrained’, as per the building code, services that meet the following conditions don’t require any additional seismic bracing, the hangers are able to provide enough rigidity alone:

  1. Pipes are less than 50 mm in diameter; and
    2. Pipes are suspended by individual hangers of 150mm or less; and
    3. Have 150 mm of clearance from hangers and braces for adjacent suspended components
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Ductwork

Like pipework your ductwork system designs do not require seismic bracing if:

  1. The ductwork is considered rigid; and
    2. Ductwork is suspended by individual hangers 200mm or less; and
    3. Have 150 mm of clearance from hangers and braces for adjacent suspended components
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Non-essential electrical services

Non-essential electrical services (i.e. cable trays), do not require seismic bracing if:

  1. The services are suspended by individual hangers 400mm or less; and
    2. Have 150 mm of clearance from hangers and braces for adjacent suspended components.

If you are able to keep flexible ductwork to less than 1.5m, it is less likely to require additional seismic bracing. When adding in individual components, such as speakers in a ceiling cavity, keeping these under 7.5kg where possible will also reduce the need for seismic restraint. 

The minimum spacing requirements for unrestrained services (pipework, cable trays, HVAC ducts and suspended ceilings) are as follows:

When working with FDG, we call on the right partners to make sure that all factors are considered as part of the design for the products we supply, meaning your project isn’t held up, getting the right approvals or drawings later in the project.

FDG in conjunction with BVT has the knowledge and expertise when it comes to the relevant NZ Building codes and standards, ensuring you have a complaint and trouble free installation.

We encourage you to speak to us early in the process to ensure that: 1. You consider all factors in your tenders/ budgets and 2. You have look into the potential to reduce bracing while maintaining a fully compliant design.

Reach out to us today about your upcoming project so that you have the right information up front to keep you moving and making.

How to install Threaded Rod & a Quick Lock Pipe Clamp – FDG

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