There are several ways to build campfire stacks. Your choices will be determined with what kind of fire wood you have and the purpose of your campfire. If you have split wood, than the following method will be the best for your campfire.

	Step 1: Determine how big you want your stack to be. This would be determined by the number of people around a campfire. The maximum height you could stack would be around 20 levels of fire wood. The larger the crowd, the more pieces of wood you would need on each level. Once you have determined how high and wide your stack would be, take the wood and seperate them out into different widths. Have three loose categories, big, medium and small/thin fire wood as shown. The total number of big and medium pieces must be the exact amount you need for your stack. The thin pieces have another purpose, but need not be counted. *You should read the whole article before coming back to this first step, so you know exactly how many pieces of fire wood you need and how you will use them.
	Step 2: Place your largest 3 pieces of fire wood on the bottom as shown. This will be the base and  the first layer.
	Step 3: Place the next 3 pieces as shown. These pieces of fire wood are your second layer.
	Step 4: Just repeat Step 2 and 3 until you reach your target level. You should use all the big fire wood first followed by the medium fire wood. You may want to use the small fire wood for the top two or three levels.
	Step 5: Stack the wood more inwards as you go up. This will make your stack more stable and more importantly, the stack will collapse a short while after your campfire begins. You want the stack to collapse inwards (as opposed to outwards).
	Step 6: Bring in the thin fire wood and slot them into the stack as shown. The purpose of these fire wood is to give the fire something to directly burn. The thin pieces are best because they will burn most readily and they fit in the gaps between levels.
	Step 7: Remove a fire wood just below the thin fire wood platform as shown. This will be the entry point for the campfire torch. You could put the torch in from the top but this way is more safe as you would not have to hold the torch at a dangerous angle and risk getting burnt. You must test that the hole is big enough to accommodate the torch. If it is not, you may have to remove another fire wood just below the one you removed, to make space for the torch head.

Notes:

If your stack is high, you should build a second platform in the middle of the stack. The purpose is for the torch to rest on this platform which will burn the platform above. This will also give a tiered effect of the top part burning first, followed by the whole stack burning.

This method is easily expandable or reducable. Instead of having three pieces of fire wood per level, you could reduce it to two (a square shape stack) or increase it four (an octagon).