Double span lengths of Multibeam section span across three frame supports and provide design economy and speed of erection, as well as always offering the lowest component count. To ensure equal load distribution across the supporting steel work the joints are staggered, typically only one sleeve per run of purlins.
Double Span
- Ideal for all bay centres up to and including 8.25m
- Fewer components
- Quicker erection & programme completion
- Most popular system
Continuous Span - Heavy End Bay
This system is often referred to as Heavy End Bay “HEB” because a thicker gauge section is required in the end bays of the building, although all internal bays are a lighter gauge. With this system all purlin joints are sleeved although double span bar lengths may be used to reduce the number of sleeves. The continuous system, when used on larger buildings with 10 or more bays, larger than 6.5m is typically more economical.
- Suitable alternative to double span system for bay centres between 6.5m and 8.25m
- Appropriate for buildings of 10 bays or more
- Efficient material usage
- Moderate component count
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