Laying Out the Foundation: Start by staking the ground 6" bigger than the shed's dimension with the help of mason's string. Use the excavation tools for the ground & dig 6" deep inside of the lines you made & fill it with 6" of gravel. Now, make sure everything is leveled up & set two 6x6" timbers that are cut to proper length down. If need be, make sure that the timbers are leveled by using a straight 2x4. Building the Floor: Use 2x6's & run the joists perpendicular with the length of your shed & space them 16-24" in the middle. Make the frame go over the timbers then measure diagonally between the other corners so everything is square. Next, fasten the floor frame with nails to the timber pieces & cover it with 3/4" plywood with nails. Constructing the Walls: Build the frames for the walls using 2x4's & nails. The studs ought to be spaced at 16" in the middle. Install the walls to the floor & add tie plates (doubled top plates) to both of the long walls. In the event you are planning on using a door that has been historicallyin the past hung for your shed then buy the door in advance so everything is exact & matches up properly. Building the Roof: Cut the 1x6 ridge board to the exact length as well as of each of the rafters. Double check to see if it will fit properly & then make the adjustments if necessary. Use them to make marks & cut the other pieces & install them 24" in the middle. If desired, add other roof trims & fascia boards. Adding anything else is optional. Crafting the Roof: After decking the roof with sheathing made of plywood, install the asphalt shingles. You can also use cedar shingles or any other material you like. Install the siding over every wall. Plywood siding is usually the best option for sheds, but horizontally lad sidings have more of a traditional look for these types of structures. You may also add a corner trim or other details in the event you wish, again this is optional so it is not necessary that you do so.