The roof trusses support the plywood and shingles that make the roof waterproof.  They are very important to plan carefully because they require strange angles and they have to fit the structure below them.  We gave our shed a slight awning and this had to be accompanied by the trusses, which overhang the walls of the shed by about a foot on each side.  When constructing your joists it is important to use joist plates otherwise the angles that you so carefully planned will not remain true for very long.  We used a 2x4 to support the joists while we were attaching them to the walls.
It is worth mentioning that the files in this program can be easily downloaded into PDF format. This provides you with each access at your construction site. The best part is that you can easily browse through different shed plans on your server, and pick the ones that meet your specific project needs and requirements. You can even download everything on your server. The process is very easy to access and understand.
I'm looking about spanning 15' for a gazebo. trying to figure out what dimension beams I need. The Gazebo will be 15'x10'. How big will the beams have to be. at 1/2 the distance on 15' I will have a perpendicular beam running to carry 2x4's running parallel to 15' beam edge. I live in California in there with be no roofing material.. I will be using redwood for lumber Thanks
No shed, regardless of how well it's built, will last long if it's set on a weak base. Most sheds can be supported by an on-grade foundation, which consists of solid concrete blocks or pressure-treated wood timbers set directly on the ground. The concrete blocks or timbers (aka skids) must be leveled and spaced closely enough to properly support the shed's floor frame. Note that it's important to use solid concrete blocks, not hollow wall blocks, which can easily crack.
You can cut steel roofing panels with a circular saw and a carbide blade, but it’ll save you a lot of work if you order the panels the right length to start with. Plus, you’ll have a greater color selection if you order the roofing rather than buy off-the-shelf panels. Remember to order in advance, though, since it usually takes several weeks for the roofing to arrive. And make sure the overhangs are the right size so the panels will overhang the fascia slightly.
I like to use the hip roof design, it is pleasing to the eye, it is the best roof for high winds, certainlly a good idea with the hurricanes and tropical storms found in South Florida. I always build my sheds on a raised concrete slab for stability, I also use double hurricane ties. All studs and rafters are pressure treated because of the area's termite problems. I always anchor the shed to the concrete slab with expoy bolts. I never use T11 siding it does not hold up well in a subtropical climate. I use OSB under the siding and I often cross brace. I prefer a metal roof screwed down not nailed using water gasket screws. I generally use ridge vents or a wind turbine to help cool the shed and I also use Bahama shutters for the same reason. I build with rafters not trusses so I can keep the celling open to also cool the shed. This makes the shed expensive but after twenty years of use one of my oldest sheds which received proper up keep is still perfect. So which is cheaper one shed for life or one after every major windstorm? I know the answer because I had one shed stand up to a huricane!

Ryan had a difficult time building his own first shed. Wrong material, wrong measures, wrong techniques, all of them didn’t help in making the shed any quicker. It took him 6 months to complete his first shed project, and at the end of it he was worn out and exhausted. Even after spending a lot of time reading and purchasing woodworking books, blueprints, nothing seemed to work. Most of the shed plans he bought lacked vital information which left him with more questions than answers. That is when he decided to leave it all aside and build his own shed plans. That was the beginning of his work towards building his master collection of shed plans.

I tell most of my subscribers to use his program as a resource just like you would a book.   His plans are not all you would ever need in regards to shed plans, but it is a nice start.   For the cost of the program, it is on par with any book you would buy at the store to find shed ideas or plans.  However, you get thousands of plans and 4 bonus offers instead of a few good plans.
• Wastage of space — this is one of the greatest mistakes one can make. It is mostly caused by poor construction planning. You may such a mistake also by taking measurements poorly. You should consider all the activities and purposes that you will use your shed for before starting the construction. In that manner, you will be able to come up with a shed design that will suit its purpose and your wishes. One may also consider building a double floor shed to save on your compound space. You wouldn’t want to deny your kids their playing ground! You may also want to construct a different structure in the future then you get hindered due to the little space left or unless you would have to dig deeper into your pockets to modify your shed.