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.
Typical single span arrangement indicating the purlin positions.
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.