Abstract
This paper describes development studies on a new composite lattice joist floor
framing system, particularly on the performance-based approach taken to fire resistance. This has involved collaboration between the manufacturer, a consulting engineer and university researchers. The light-weight open-web floor joist is fire-protected offsite using intumescent paint, to achieve a one-hour fire rating. It is a competitive light-weight option for long-span floor construction, which allows ducting to pass through the voids in the lattice. It eliminates
the need for through-deck welding on site due to the presence of pre-welded shear connectors in the top chord. The main objective was to develop a cost-effective method of achieving one-hour fire resistance using a single coat of intumescent paint. This system is common in hot -rolled steel construction, but has not usually been associated with light-weight coldformed sections. The system has been analysed using the specialized software Vulcan. The prototype design was based on 750mm deep Warren joists of 15m span, spaced 2.5m apart,
with a composite concrete slab on profiled steel decking. A BS476 loaded fire test was carried out at the Warrington Fire Research Centre which verified the software approach. Recent modelling has focused on developing a series of such joists to be used over a range of spans.
framing system, particularly on the performance-based approach taken to fire resistance. This has involved collaboration between the manufacturer, a consulting engineer and university researchers. The light-weight open-web floor joist is fire-protected offsite using intumescent paint, to achieve a one-hour fire rating. It is a competitive light-weight option for long-span floor construction, which allows ducting to pass through the voids in the lattice. It eliminates
the need for through-deck welding on site due to the presence of pre-welded shear connectors in the top chord. The main objective was to develop a cost-effective method of achieving one-hour fire resistance using a single coat of intumescent paint. This system is common in hot -rolled steel construction, but has not usually been associated with light-weight coldformed sections. The system has been analysed using the specialized software Vulcan. The prototype design was based on 750mm deep Warren joists of 15m span, spaced 2.5m apart,
with a composite concrete slab on profiled steel decking. A BS476 loaded fire test was carried out at the Warrington Fire Research Centre which verified the software approach. Recent modelling has focused on developing a series of such joists to be used over a range of spans.
| Original language | English |
|---|---|
| Title of host publication | Proceedings [of The] Nordic Steel Construction Conference 2009 |
| Number of pages | 8 |
| Publication status | Published (in print/issue) - 2009 |
| Event | Nordic Steel Construction Conference 2009 - Malmö, Sweden Duration: 2 Sept 2009 → 4 Sept 2009 |
Conference
| Conference | Nordic Steel Construction Conference 2009 |
|---|---|
| Country/Territory | Sweden |
| City | Malmö |
| Period | 2/09/09 → 4/09/09 |