Coarse threaded screws that are long enough to hold together what you want.
Bracing you can use 1 x 2 , 2x4 I have used threaded rods before with great success also. Just remember to subtract your bracing from the total volume. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif