someone get me some industrial grade reinforced steel rods used for supporting buildings, and somehting to hammer them into the ground with.
plant these spikes down as a wall of impailers ie like a hopolites phalanx but thicker, make sure they cant buckle from pressure of the dead. station millita behind it with shorter versions or axes, because these are the best weaponry short of guns for breaking the skull open and detroying the brain. give them molokov cocktails made by looting the local pubs, bars and nightclubs to burn the impailed bodys. the dead will act as a barrier in themselfs, since zombies are not notorious climbers, and applying pressure on said wall will further impail them and impaile themselfs, making it easy to kill. its a self strengthening wall.
behind such a wall, so long as were not flanked -so as a stronghold, say, this guarding the entrance to a walled compound with just 1 gate in and out-
this kill zone will be highly affective with a minimum of personel, and you only need to start 1 fire before you can reuse it. since they take so long to burn out on a human body of fat.
personaly, thats how ide set up my own little stronghold. any humans trying to get through would have to be let in via a ladder or such, unless we went for the 2 partial walls so their was a walk way between the spikes if you went round one and and came back across to the other untill you got in. searched and systematicaly disposed of the infected. since zombies havent got the brains to go round and will walk in a straight line to the food they can see/hear, should walk straight into spikes and basicaly commit harry carry on their one two bill.
---------------just a suggestion for the fortification of the strongholds-