So I did an experament today and the arch piece for my trailer is 3 lbs for a 10 foot chunk
it is a 10 foot long of 1 1/4 PVC pipe I'm going to not only use it for my water tank but I'm also going to use it for my roof trusses and what not so f I were to do say a roof truss it would weigh in the neighborhood of 3.9 lbs per truss so now it all depends on how big to go I know this build has changed so many times already i'm just glad I'm actually doing it instead of dreaming about it so do I go 8-12-16 as the weight for the roofs would be 25 lbs per sheet of plywood 1/4 inch thick brings me to around 8'=69.5lbs 12'=104.25lbs 16'=139lbs so those are some interesting numbers I have there a non insulated roof that can hold up to Canadian snow be a water storage tank while I'm parked and weigh under 200lbs now we are talking light
seeing how a 2x4 weighs between 8-10lbs so lets call it 9lbs my walls could weigh47 lbs per 4 feet a side...Sorry about the rambling but it helps me think and then I can look back on here and see what I'm think of makes sense..ok back to the trailer mat a 2x4 can hol 400 lbs to 600 lbs depending on the angle so if one truss is holding 50 lbs of water the 2x4s can still handle a load of300lbs to 500lbs my roof aint going to weigh that much.. I have also been thinking of using 3 oz fiberglass to cover the whole thing when I'm done to help solidify and seal things up nice and tight I might even have to skin the insides as well then....hmmm and I have 7 door skins in the back room just weighting for a home...Now just have to make the trailer frame a touch lighter I heard that rectangular metal is stronger the square metal si if you go a size smaller but flip it so that it is pushing on the longer side it is actually lighter as well as stronger it looses on the side to side strength but that is why we box in our frames and have cross members....Well I'm still waiting to hear about what you think I should do for a roof PITCHED vs ARCHED
Thank you for following my build and babble