If you like using your fireplace, then you need a firewood box. Having a good firewood box means you do not have to make so many trips outside, especially at night. In addition, a well-designed box ensures that you will not have a mess to clean up each day ... and it looks good, too.
A good firewood box is large enough to hold at least one day's fuel, and it also holds enough different sizes of wood for the different stages of the fire--smaller pieces for starting the fire, larger pieces for building it and the largest logs for maintaining it. Do not make your box too large, however; you will want to clean out excess chips, dirt and even bugs that fall off the wood. A large box may mean fewer trips to the woodpile, but it may make cleanup too difficult.
You should also consider whether you want a lid on your box. A box with a lid needs to be larger to hold the same amount of wood than one without, simply so the lid can close properly. A lid also requires hinges--an extra expense.
Finally, do you want to use your box for transporting wood in the house? If so, you will not only need wheels, but handles to help you maneuver it through the house. Bear in mind that wheels capable of rolling on carpet may be different from wheels used on a hard floor.
You can use the most basic construction techniques for building your box, but it must be sturdy. Use 3/4-inch plywood for the sides and bottom, and use 1 x 1 lumber to reinforce the corners. Use screws and glue for extra strength. You may want to use several 1 x 2 lumber slats on the bottom, to both stiffen it and provide a solid mounting surface for wheels.
If you choose to add a lid, you will need a couple of hinges and a handle. You may choose to skip the handle and just make the lid long enough to hang over the front edge, giving you a ridge you can use for opening the box.
Finishing and Placement
Whatever finishing technique you decide to use on your firewood box, you should choose something that will not catch fire easily. Fire-retardant clear-coats, paint and additives for paint are all available; check your local home supply center.
And do not forget that your fireplace requires a certain amount of space between it and flammable materials like your firewood box. Be sure you keep it at a safe distance.