![]() ![]() Joists that span 12', 15', or 20' are common. By using 24', 30', or 40' width for the structure, you can also save on the floor system in the basement by having only one support beam across the whole basement.Also avoid hip roofs ($1-$2k+ for each corner), and limit the number of "valley" sets you have to buy If you can design the roof with off-the-shelf parts in a way that all the water will flow correctly, you can avoid custom carpentry (like crickets) which will drive up the cost. Think about the roof design and how water flows down the roof.If the building is one story, this would mean that you would have no load bearing interior walls, which makes the engineering of the structure much simpler and more robust. ![]() If you can design the footprint of the house around the common truss measurements (24', 30', 40'), you can have all the roof load of the house on the exterior walls, transferring directly to the foundation.3 x 16" is 4 feet, so 16" dimensions are also acceptable. Try to design the rooms in increments of 4 feet, which saves on framing, drywall, and subflooring parts/labor.Design the house as square as possible, or in a series of adjoining rectangles try not to have any weird corners.I'm not an expert or a professional, but I've found a few things so far in my own research: I've been doing the same research as you. ![]()
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