It is important to make sure you have a good strong floor1.5cm to 2.5cm (1/2in to lin) thick boards supported by 5cm(2in) cross members on 7.5cm x 7.5cm (3in x 3in) runnersthe length of the loft. It must take more than your own weight,for at some time or other you are certain to have visitors withyou. But, although strong, it should be portable. The floor of,for example, a 5.5m x 1.8m (I8ft x 6ft) loft, could well bemade of three sections 1.8m (6ft) square. Portability, in fact,applies to all parts of a loft. Construction should be insections, and the sections should be joined only with nuts andbolts so that, if the loft needs to be moved, the job can beeasily done.