Browse Forums Owner Builder Forum 1 Jun 03, 2017 3:26 pm I'm in the process of planning to convert some loft space into a storeroom. The flooring will be 900mm wide sheets of "red tongue" 22mm thick particle board. Joists will be 450mm apart and spanning a gap of 4 metres. The ground floor uses internal brick walls. Therefore each joist will be supported by a single brick wall at each end. I am considering using steel "C" profile purlins for the joists. 150mm tall by 64mm wide. They come in a variety of metal thicknesses from 1.5mm to 2.4mm. I need to make sure i pick a size with adequate strength to span the required distance. But i dont want something so heavy that i cant get it into place. Any advice from our resident engineers on what size purlin i should be considering? Re: Using "C" purlins for a loft floor 3Jun 04, 2017 12:46 pm Dexx I've done a few lofts/drawing/Construction (3D) details in my time and they are very useful for owner builders Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ I hope you find them useful The Loft Floor loadings are Based on Live loads of 1.5KPa For Storage you will need to have it properly Designed, Engineered & Certified You will need to provide Photos & More info if you want specific details Please share your project HTH Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs 5 14144 ![]() bec of more thickness and underlay i prefer laminate. also my builder covers laminate only. 2 18243 Hi Wokka, I would have to agree re "I would be taking this opportunity to replace your subfloor in the sections that… 2 14906 ![]() |