Hi all, this is my first post on this site and have a little knowledge with the terms and words what the builders use lol, I am wanting to convert my loft and trying to get some guidance on my floor joists i need to put in. My ceiling is being held up by 5x1 joists which are no good to lay a floor on, these run from gable wall to centre of the house were there is an 8x3 joist which runs from the front to back walls of the house which is a span of 28 feet which has a supporting wall in between which has foundations and in which the 8x3 joist rests on. View media item 6639 . Is there a way i could reinforce these 5x1 joists up to support a floor? each are 11 feet in length and are spaced 400mm apart, i believe this could be done but i am not sure if the 8x3 joist is strong enough or is it? on the gable wall they meet there is another 5x1 which runs along the wall that they are secured View media item 6641 to and cant suss a way out how i could strenghten them so the only way i can think of putting floor joists down is to go from the wall at the front and rear of the house to the centre wall which has foundations, the span from wall to wall is 14 feet, would 9x2 be strong enough on 400 centres to give a good solid floor? My next mission is when i redo the main roof i want to take some roof supports out to open theloft up to make it a straight walk through but want to make sure the roof dosent cave in lol. as you can see from this picture View media item 6642 would it be ok to reposition the supports to go vertically down as illustrated? [/img]