Dimond Top Notch Purlins

Dimond Top Notch (Top Hat) Purlins

Suitable for residential

Suitable for light commercial

Suitable for commercial

Top Notch (Top Hat) Purlins are manufactured in Auckland and Christchurch.

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Dimond Top Notch Purlins

Dimond’s range of Top Notch purlins are compact, lightweight and easy to install. They are ready for use in many smaller spanning applications from 2m to 7m. Top Notch purlins come in a full range of sizes from 60mm to 150mm depth, easily tek screwed to the supports without the need for purlin bracing and cleats.

Profiles can be viewed here

Scope of Use

Dimond Purlin Systems are intended for use as structural support to roofing and wall cladding. The systems provide for bolted connections to primary structural framework and include Dimond Hi-Span (DHS) Purlins, Fastbrace, Dimond Brace Channels and Top Notch purlins. The systems are subject to limitations on the environment in which they are used, depending on the type of coating specified.

Dimond Purlin Systems are not intended to be used as members to which fall arrest anchor points are attached.

Dimond purlin systems are not intended to be used as vertical studs or horizontal wall girts where plaster board is fixed directly to the DHS purlin and a level 4 finish or above is required. Where a level 4 finish or above is required, Dimond recommend fixing a secondary adjustable grid framing system to the DHS purlins prior to lining with plasterboard to ensure a tighter alignment and fixing tolerances, to achieve the required finish.

It is critical to product performance that the loads applied, member spans, member sizes and bracing points are designed within the appropriate Limit State Loads and limitations published in this manual. Before commencing a project using a Dimond Purlin System, the designer must ensure relevant information is available to the end user. Failure to observe this information may result in a signifi cant reduction in product performance. Dimond accepts no liability whatsoever for products which are used otherwise than in accordance with these recommendations.

The information contained within Purlin Systems is only applicable to Dimond Purlin and Bracing Systems – it cannot be assumed to apply to similar products from other manufacturers.

Use outside the stated guidelines

If the need arises to use a Dimond Purlin System outside the limitations and procedures given in this manual or if there exists any doubt on product handling or use, written approval should be obtained from Dimond for the specific project, before the project is commenced.

Load Span Tables

DHS Load Span tables for Single, End and internal spans can be found here.


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