![]() ![]() ![]() :-) My plan is to get the plan as far along as I think I can take it and then hand it over to a pro to correct/finish. I have some books coming to teach me the terminology etc so hopefully I'll be able to communicate my needs and questions better. ![]() I'm using Chief to plan everything using photos and plans from other houses we like. I've always been interested in architecture (almost went to school for it until I found programming) so now that we're planning on building our house I want to be involved. No, I will not be building it myself, I'll be hiring a builder/contractor. You can also install exposed beams that have very little to no effect on the load/structure as well but again it's an engineering question as much as a design question and very difficult to answer in any definitive manner on this forum. To answer your question more directly, exposed beams will effect the overall structure and load/framing if they are engineered to do so but they don't have to. I'm curious Ryan, are you building a house for yourself? What is your overall plan? Your knowledge seems to be very limited and your experience as well but I don't want assume such things without knowing what your overall plan is. Thanks, I'll definitely run everything by an engineer but should I worry about any of these changes altering the overall layout? I was thinking I should get it right now (size wise maybe not type etc) so it doesn't affect the plan but if it's autogen maybe that doesn't matter? We'd also like to have exposed beams but I'm not sure how that affects the load/framing and if we can use those as rafters or not. Sizing them is another question but once you know the sizes you can tell Chief (not the other way around) what size to make those members in that roof framing dbx. The rafter depth is hidden in the structure dbx and the width specified below. Make sure auto roof framing is turned on and you can change sizes in the roof framing dbx. Is this something chief would recognize/fix for me or would I have to do it? I can't figure out how to put in a ridge beam even if I wanted to.īoth the rafter sizes and ridge board/beam size can be specified in Chief's roof framing dbx. I don't think they make dimensional lumber this large and it probably wouldn't be very good if they did but Chief has chosen normal 2圆"s so is this something I have to watch and change myself?Īlso, same plan the ridge board seems pretty dinky. RECOMMENDED MAX.I'm playing around with a vaulted ceiling and noticed in the framing section that the rafters are 256" long and the center frame pole (what's this called?) is 342 5/8" long. If your old joists do not meet the requirements set by the table, they are either supported somewhere from underneath or they were installed pre regulations (November 1985). You need to measure the complete span of your floor joists, together with the distance between them (the ‘centres’) and the size of the timbers. This table is for a dead load of more than 0.25 but not more than 0.50 and allows for an imposed loading of no more than 1.5 kN/sq.m. Unless C24 timber is specified, the more generally used timbers are less expensive C16. ![]() It is again accepted that, for normal household requirements, the imposed load will not exceed 1.5kN/sq.m. The weight we place upon a floor by way of bathroom suites, beds, wardrobes etc, is known as the “imposed load”. This dead load is generally taken by architects and planners to be no more than 0.50 Kilo Newtons per square metre. The joists must be able to support this dead load without sagging. The weight of the timber floor itself consists of the timber joists, the plasterboard ceiling underneath it (except for suspended timber ground floors), the floorboards and the nails or screws used to fix both of the aforementioned coverings.Īll of these are known as “the dead load”. You can also download this excellent pdf span table guide (includes C16, C24 and I-joists) Building Control may ask for additional engineer’s calculations. These tables can help calculate whether floor joists are strong enough to support themselves and the load they carry, without the help of any walls underneath. Surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors. ![]()
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