I live in a detached house with a gable roof, quite high pitch. The house builders have put in several steel roof straps attached to the rafters. One of these is near to the loft access and is limiting the entry access. The strap is ~ 800mm and is embedded in the masonry of the end wall and nailed to the first two timbers of the truss. I would like to move the strap so that it is a bit further up the wall (say about 800mm) to provide clear entry access to the loft. What should my approach to this problem be? Do I need to get a builder to do it and what is likely to be involved? Will the new strap have to be embedded in the masonry in some way or could it be screwed into the breeze block using a right-angle strap? Any suggestions out there?