Russell griffiths Posted March 10, 2018 Share Posted March 10, 2018 Has anybody got any cost comparison between a steel web joist or a jji I beam type joist these will be used for roof rafters rather than flooring just trying to get a feel for it before I ask a few local companies. Cheers russ. Link to comment Share on other sites More sharing options...
PeterW Posted March 10, 2018 Share Posted March 10, 2018 I found that for roofing the metal web ones were slightly better as they had a wider top and bottom flange but the JJi joists can be altered on site so would have been easier to work with. In the end we went 8x2 as tbh it was easier !! Link to comment Share on other sites More sharing options...
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