Hi, I have a 500 year old house that needs complete renovation. I need to put in 2 new floors. The floor plan measures 6m x 6m (approx 20ft x
20ft). the old joists are really small. What size of joists would I need to span this distance without using support posts? The house is in croatia so I dont think I will have access to I-beams. I could buy 100mm x 200mm or 140mm x 200mm fir. Would these be strong enough ? Cheers.- posted
19 years ago