Butt Purlin System

Butt Purlin System

The butt system is suitable for buildings with single bays or more.

The butt system offers a simple cleat connection and is intended for smaller buildings, short or uneven spans, or light loading conditions.

The butt system caters for spans of up to 12m depending on the load to be applied and where the cladding or liner tray offers adequate lateral support by virtue of its screw fixings at 600mm maximum spacings to the purlins. This system can cater for single bays and can therefore be used in conjunction with other systems detailed in this brochure, or as a system in its own right.

Computer controlled production techniques apply the client’s individual mark numbers to all purlins automatically during the manufacturing process.

  • Detailing

    Typical single span arrangement indicating the purlin positions.

    Butt Purlin System - Typical Single Span Arrangement

    Butt Purlin System Detailing Information

    Butt system (mm)

    A B C F
    142 42 56 50
    172 42 86 50
    202 42 116 50
    232 42 146 50
    262 42 176 50
    302 52 195 60
    342 52 235 60

    Unless otherwise stated, all required holes are 18mm diameter for M16 bolts and are normally pierced in pairs on standard gauge lines. For ‘General detailing’ notes see General Detailing Information.