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I've a 203x133UB25 beam ready to be installed across a double garage opening, it will have a wall plate fitted and hold one end of the timbers of a flat roof, may also hold the double garage door later. SE stated the above on a quick phone chat, but never came back to me with calcs or info and or confirmation and is ignoring my calls. No BCO involved 2 questions 1. Is it undersized? Ive been doing some reading and seen people are using 203 x 203 x 46 or 60 in these cases 2. What size padstone is best for either the 233 UB or the 203 from q1? Dimensions attached Thanks guys!

Building a double garage as shown in photo attached. Id like the fall to be from front to back across the 5.8m span. I'm struggling to find the right roof rafter size to tolerate that span. I plan to have OSB roof, EPDM (rubber roof) covering, interior insulation in between rafters. Is the 5.8m span doable? Could I bolt two rafters together across the 5.2m span to reduce down the 5.8m span into two separate sections attached to the double rafters by joist hangers; sitting on 1 end of the 5.8m wallplate and the other ontop of the steel wallplate, therefore allowing me to use smaller rafter sizing? Is it too much hassle, should I just go across the 5.2m span (which is less than ideal as it doesn't help with the garden side view of the garage for my plans. Advice welcome and thanks in advance!