the calculations for this beam are much simpler in there half a page the others are pages long why would this be? One of the beams are for some bi fold doors span around 3900mm which is a with 6mm plate on the bottom. beams are would that be calculated per beam of the twin beam so two bolted together would limit this? Was reading something about deflection and read through my calculations just to see what they are.Ģ of the 5 are small beams and the deflection is minimal less than 2mmĢ of them are a twin and the deflection is 12mm over a 4500mm span this seems alot but im guessing this is the maximum worst case so in reality what would it deflect normally ? it says this is calculated at 77.5KN/M which sounds like a lot of load but then again most of this i cant quite get my head round. In the process of building an extension and had some calculations done by SE for beams etc this is is more a curiosity question.
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