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Hi, I am new to this site and not sure if this is how you introduce yourself. Anyway, I am not very experienced at DIY and am looing for a little guidance. I am fitting some shelves in my garage and wanted advice on the timbers to use. The shelves will span the width of the garage above the up and over door. I want to put all the "junk" we keep in case we need it up there like carpet offcuts, left over guttering, cat basket etc, so don't anticipate there being more than 200kg in total supported there. Garage is 2700mm wide and I wanted to fix a wall plate 2440mm long to each side wall above the garage door and then span across with 4No: joists, two at the front of the garage to take 600mm wide ply or MDF shelf and then two at the other end of the wall plates to take a similar shelf. I would also then put a shelf running the length of each wall plate again 600mm wide to complete the "square" of shelves. The garage has been plastered and the left hand wall is the original external house wall and is sound facing bricks/Cavity/Bricks. The right side wall is a cavity wall again but the internal skin is lightweight blocks/cavity/facing bricks. I want to bolt the wall plate timber to the wall and I had thought to use a threaded 12mm x 160mm BZP bolt epoxied into 14mm holes drilled into the bricks/blocks. Looking to get 80mm into these so I don't pop out into the cavity. Then fixing a 45mm x 170mm wall plate on to the bolts with holes about 100mm down in timber so not near top. Then using timber to timber joist hangers nailed with easy twist joist nails 3.75mm x 30mm. The joists I was thinking of would be 45mm x 120mm and be set so that top of these was level with the top of the wall plate. Then some 18mm MDF cut to 600mm wide to board out. Can you help me select: A. right size timbers for wall plate and spanning joists. B. Right bolts?