Our Vision

Profitable growth with a Quality market leading product, a great customer base, exceptional people and continued investment.

Our Mission

To attract and retain valuable customers.

Sigma purlin systems & jointing layouts

Albion offer a variety of Sigma purlin systems to suit differing applications.

The Sigma purlin shape provides an efficient, robust profile that suits both short and long span conditions.

In most cases of popular building type sag rods are not required (subject to wind uplift conditions), see table on page 9 of Albion's Sigma Purlin Brochure.

Sleeves are required to provide continuity to the purlin section across the supporting rafters.

Albion Sigma purlin

Design specification

Sigma purlin systems

Download brochure

Contact us

The most popular system, double spanning, has been specifically developed to minimise the number of sleeves, thus reducing the number of components and resulting in savings in installation time and component cost.

The sleeve details have also been considered in terms of simplicity and duplication. All sleeves are the same length with identical longitudinal dimensions, uniformity reducing the chance of errors.

► Single Span Butt System	The simplest of the Purlin Systems. Use where design conditions dictate that no connecting Sleeves can be used, i.e. Purlin within depth of Rafter.
► Double Span Butt System	The most popular Purlin System combining Double Span lengths with a minimum of Jointing Sleeves.
► Single Span Sleeved System	Where Purlins are required to be Single Spanning, but still maintaining continuity over the Rafters, the Single Span Sleeved System can be employed.
► Heavy End Bay System	The Heavy End Bay System offers the economic solution for the larger, Multi Span type building.
►Sleeve Assembly and Cleat Details