This detailed article is about 16 free firewood storage shed plans.if you want to store your firewood in a professional manner, you should consider these projects. i have selected the best firewood shed plans on the internet.. Firewood storage shed plans. placing the concrete blocks. first of all, you have to prepare the location for the wood shed. therefore, you have to level the terrain and place four large concrete blocks on the corners of the shed. this is a cheap method to build the footing of the shed, but you could also pour a concrete slab for a permanent. Fun and easy firewood shed plans for building a 4'x8' firewood storage shed. plans come complete with detailed blueprints, materials list, building instructions, email support, and 3d interactive pdf page that lets you explore the plans in 3d..