I am planning on building a single storey, flat roof extension to our single storey house. I want to remove the full outside wall and install a 7m long steel beam that the ends of the roof trusses will sit on. I know hoe to size the steel bem but I'm having difficulty working out what load will come onto the beam from the roof trusses. Does anyone have any guidance on calculating the loading (even a quick method) as all I want to do initially is work out what depth of beeam I need to see if my plan will work or whether I will end up with a headroom problem.
The roof trusses are 'fink' type and span about 5 metres with a 40 deg slope and concrete tiles.
Alan