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Albion Engineer Design Disk Albion Engineer Design Disk

Heavy End Bay System

Suitable on buildings of 5 bays or more, the heavy end bay system offers the economic solution for the larger, multi span type building.

The system utilises the purlin continuity provided by the section or by the connecting sleeves, to reduce the gauge of the inner bay purlins

Sigma Purlin Systems
Single Span Butt System
Double Span Butt System
Heavy End Bay System
Sleeve Assembly and Cleat Details


Single span arrangement (All Sigma Sections)
Heavy End Bay System - Double Span Arrangement (200, 225, or 240 Series Only)



Double Span Arrangement

(200, 225, or 240 Series only)

Heavy End Bay System - Single Span Arrangement (All Sigma Sections)


Sleeve thickness to penultimate rafter dependant on End Bay section (see page 5 of our downloadbale Sigma Brochure).

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