You could put 2 walls in place screwing pieces of timbers as supports. Each truss consists of two 2 x 4 struts and a 2 x 4 chord that also acts as a ceiling joist. This would add to the initial cost of your shed but it might also save you money in the long run because a floor built with pressure treated lumber would last longer in these areas. Along the length of the shed, they are set in 16 inches and spaced 56 inches apart. Choose hinges with wide flanges so screws will go through (https://shedconstructionplans.com/12x20-saltbox-shed-plans-blueprints) the trim and enter the trimmer stud behind.
Using framing square at slope references for the rise over the run on the top of the rafter, measure from plumb line to the desired measure. Another type has a flat lumber block set into the top so you can toenail a joist in place. Place the remaining trusses over the vertical blocking, secure them with screws, and install timber deck and shingles. This is where you need to understand basic trigonometry in that in an equilateral triangle there are 3 sides, let's call them a, b, and c. A few minutes with car jack and we were able to push it back and re-level the shed.
Measure width of a joist from lower edge to underside of subfloor to determine the width of 2-inch-thick framing lumber for blocks. Working with each door panel individually, we could now frame the outside (look at more info) of these panels with 2x4's and 2x6's as such. It's common practice around here to glue down asphalt shingles with roofing cement. You do have to take a little extra care to craft sure the framing is square and perimeter 2x4s are perfectly straight before nailing on soffit, though. Years down the road, sliding doors won't sag and stick way swinging doors do. Four hip garrets are angle cut to fit between the two perpendicular common garrets at end of the ridge board.
However, a outbuilding with a skid foundation offers a variety of possibilities depending on its size, location and use. Hardie board is cement siding that you hang with screws and comes in different colors. Use a power drill for concrete block and lumber ledgers. The more slope, more material to move. Cut another blocking piece and insert it into next joist cavity. Take the wall length measurement to choose boards for top and bottom plate. Or how far to place it from your property line. The roof framing itself in this situation is much like any other traditional roof framing and is not complicated.
However whole building is on top of particle board floor which sits on top of posts. Keep nails 1 inch inward from edges. The ledger board needs to be 12-inches above the top of the lean-to walls. If you're making this with new material, thickness is not critical. Remember, if you can't walk through your outbuilding and reach stuff you need, then your shed isn't being utilizing its storage space effectively. This will help keep out damp. Some areas have seen it as a cash grab and added new zoning permits for sheds under specific square footage. There is something to be said for digging foundation holes below frost line and pouring concrete footers reinforced with rebar.
Study blueprint and construct note of location of any stairway openings, floor joist cantilevers, in construction floor beams, and heavy loads from above. Make your life easier at this point by running your tape measure from the top plates of shed and the side beams of pavilion to the top of beams to construct sure they're parallel. It seems like it's really well built too. Frame in rough openings for windows and the door. When choosing shed, the size will be important. At the highest point and sloped downward. When framing tall buildings or roofs, be extra careful against falling.
Smooth surface with 100-220 grit sandpaper and remove the residues with a damp cloth. Cover floor with 18mm inch treated timber, nailing a maximum of 200mm apart around perimeter and along all beams using 60mm galvanized nails. For a joist in the field between edges of a floor, position one edge at a layout mark on the upper edge of a girder. If it's a barn or garage, then cost out manufactured trusses. They buy lumber in large quantities so the price they sell it at is affected by what they paid for it and this is usually different for each supplier.