Double Span Butt System
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The most popular Purlin System combining Double Span lengths with a minimum of Jointing Sleeves. The Sleeved System can be used for buildings with two bays or more and combines a cost effective solution with ease of detailing. |
Sigma Purlin Systems |
| Single Span Butt System | |
| Double Span Butt System | |
| Heavy End Bay System | |
| Sleeve Assembly and Cleat Details |
Bay widths are limited to 8m (Maximum Purlin lengths 16m).
Used with 200, 225, and 240 Series

Albion Tip: Albion recommend the use of this system to minimise material content and the number of system components.
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