Firewood 101
Copied from Before its News
Thursday, December 19, 2013 17:45
Collecting
firewood is more involved than just cutting trees down, cutting them up
and stacking them to be burned in a wood stove. Here is some very
important information to follow when gathering firewood.Seasoned firewood comes from two sources. 1. Trees that are dead and standing or on the ground. (Needles/leaves have fallen) If the bark is partially or completely missing this usually indicates that the tree is probably dry/seasoned. However, notice if part or all of the tree has deteriorated beyond usefulness. Standing dead trees can be dryer than fallen dead trees. 2. Green/wet wood that has been cut to the proper length for a particular stove, split, covered and allowed to air dry for at least 1 year or more. It may require more than a year to dry if the wood comes from a region that receives a large amount of precipitation per year resulting in wood that contains more moisture. Why should unseasoned wood (green/wet wood) not be burned in a wood stove? When unseasoned firewood is burned the moisture in the wood becomes vaporized and is expelled up the stove pipe. As the vapor travels farther away from the fire it begins to cool and collect on the inside of the stove pipe, solidifying and forming creosote. Under certain conditions the creosote can ignite and become a dangerous “chimney fire”. During a severe chimney fire a steel stove pipe can melt down causing the house to catch fire. Also a mason chimney/chase can get so hot it will crack and allow flames to lap thru catching the attic/roof system on fire.
2. Have at least a 2-year supply of firewood on hand
What if the firewood cutter in the family got sick or broke a bone? Or, what if there was an unforeseen emergency, whether national or global, that prevented one from collecting firewood? Wouldn’t it be wise to have at least a 2 year supply of firewood on hand?
3. Save trees on your property for times of emergency
According to a Storey Country Wisdom Bulletin titled “Woodlot Management”, one needs a minimum 5 acres of trees to maintain a renewable supply of firewood. This depends on the climate of the area, the size of the house, how well it is insulated and the efficiency of the wood stove. What if you don’t have a minimum 5 acres of trees available for firewood on the property? It would be prudent to collect at least a 2 year supply of firewood from other sources until those sources are no longer available. Then and only then start using the firewood on your own property.
4. Know your trees
Not all trees are created equal. Some species contain more heat units (British Thermal Units…BTUs) than others. This is to say that some species will give off more heat per pound of wood, burn longer and leave less ash than others. Each region of the country usually has at least one of these species of wood. You must make yourself aware of which is the best in your region. The following table shows various species of wood and their corresponding list of “Available heat at 50% efficiency in millions of BTUs. (Most wood stoves)”
Species Millions of BTUsHickory 13.8
Apple 13.2
White Oak 12.8
Sugar Maple 12.0
Red Oak 12.0
Beech 12.0
Yellow Birch 11.8
White Ash 11.8
Hackberry 10.4
Tamarack 10.4
Paper Birch 10.2
Red Fir 11.1
Cherry 10.0
Elm 9.8
Black Ash 9.6
Jack Pine 8.5
Norway Pine 8.5
Lodgepole Pine 8.8
Hemlock 7.9
Black Spruce 7.9
Aspen 7.3
White Pine 7.2
Balsam Fir 7.2
Grans Fir 8.4
Cotton Wood 6.7
Basswood 6.7
White Cedar 6.1
Compiled from information from the Univ. of Minn. and the Univ. of Idaho.
5. Estimating the number of trees needed
Once it is established how many cords of wood is needed to heat your dwelling for a season, the following table can be used to estimate how many trees will need to be cut.
Table for Estimating Cords per Tree
DBH Cords/tree No. Trees to Make a Cord
4” 0.01 67.00
6” 0.04 23.00 DBH = diameter outside bark
8” 0.09 10.50 at 4.5’ above ground.
10” 0.17 5.80
12” 0.28 3.50
14” 0.41 2.40 Univ. of Idaho Extension Service
16” 0.58 1.70 Data.
18” 0.70 1.30
20” 1.00 1.00
22” 1.20 0.82 Cord = stack of firewood
24” 1.50 0.67 4‘ W X 4‘ H X 8’ L
26” 1.80 0.57
28” 2.20 0.46
30” 2.50 0.40
6. Finding the right kind of firewood
While looking for a particular species in a forested area try to find a stand of trees of that species. The possibility of finding a dead tree of that same species will be increased. If cutting firewood in a National or State forest be sure to have proper permits with you and know the regulations. Also if cutting wood in a National or State forest it is best to be one of the first in the area you are looking thru. This can assure you of being able to find good firewood near the road you are driving (“Low hanging fruit”) which makes it easier to get the firewood into you truck.
7. Tools needed
Chainsaws – Husqvarna and Stihl are two of the best on the market. Dealers, parts and service are readily available in forested regions of the country. Both brands make chainsaws in three different grade levels: 1. Professional grade 2. Farmer/Rancher/Mid-grade and 3. Homeowner grade. It is recommended to purchase saws only in the top two grades of these two brands.
A Stihl “Farm Boss” with a 20” bar is a mid-grade saw that should be durable enough to cut a persons supply of firewood, and then some, for years to come. I believe it is one of the best saws for the money. I have owned four Stihl chain saws over the past 25 or so years and have been very satisfied with every one.
If you have back problems or are in your golden years I recommend a Stihl
Pro MS 261 with a 20” bar. If this saw is taken care of it should cut all your firewood and then some for many years. It will do the same work as a much larger saw only a little slower.
Why a saw with a 20” bar? A person doesn’t have to bend over as far when de-limbing a downed tree and of course it can cut larger trees.
I recommend mixing the manufactures brand of oil in the chainsaw fuel. I also recommend using non-ethanol fuel (If it is available in your area) even if it comes only in premium grade.
Crosscut Saw
- If your chainsaw breaks and for what ever reason it is impossible to
get it fixed at the time, a sharp crosscut saw is an excellent back
up. A good place to find old crosscut saws is flea markets and yard
sales etc. If an old saw isn’t missing teeth, doesn’t show much ware
and isn’t pitted with rust to deeply they can often be restored back to
good working order. New crosscut saw can be ordered from
www.traditionalwoodworker.com.Ax, Maul, Steel Wedge, Sledge Hammer etc. – Snow and Neally manufactures some of the best axes for the money. Forged steel heads and tight grain New England ax handles enable these tools to have a limited life time warranty. Axes can be used to de-limb downed tress. They can also be used to cut fire wood if all other cutting tools fail. Mauls are used to split “rounds” of fire wood. If the rounds are too large for a maul to be effective steel wedges driven with a sledge hammer will split the large rounds down to a size where the faster splitting maul can be used. Good quality mauls, steel wedges and sledge Hammers can usually be found from local hardware stores or logging supply stores in forested regions of the country.
Peavey – What is a peavey? A peavey or peavey hook is a logging tool consisting of a handle, generally from 30 to 50 inches long, with a metal spike protruding from the end. The spike is rammed into a log, then a hook (at the end of an arm attached to a pivot a short distance up the handle) grabs the log at a second location. Once engaged, the handle gives the operator leverage to roll or slide the log to a new position.
Log Lifter – A log lifter is a device similar to a cant hook (a cant hook is similar to a peavey except it has a blunt end where the peavey has a metal spike) and has a short metal leg and foot attached to the handle on the opposite side from the hook. After the hook is forced to snag the log the operator pushes down on the end of the handle which in turn rolls the log up onto the metal leg/foot lifting the log off the ground. This makes it possible for the log to be cut without the chain saw touching dirt which can dull the chain. It also raises the log off the ground keeping the operator from having to bend down so far to cut the log.
Snatch Cable and Snatch Block – If a desirable tree is dropped where the end of it falls within 90’-100’ of a road, a snatch cable can be used to pull it out to the road where it can be cut (“bucked”) into proper length rounds.
This is how it works. The downed tree is de-limbed. Using either a short chain or choker cable one end of the snatch cable is attached to the end of the downed tree closest to the road. The other end is connected to a vehicle on the road which drags the tree out of the forest. If the only area where the vehicle can be driven, while pulling the snatch cable, is on the road a snatch block is then used. The snatch block is a heavy duty pulley which is attached to a substantial tree next to the road. The cable is run thru the snatch block and then connected to the vehicle. The vehicle is then driven slowly down the road pulling the cable thru the snatch block which pulls the tree out to the road.
8. Safety
Basic rule of thumb:
A. NEVER CUT FIREWOOD WHEN YOU ARE TIRED!
B. ALWAYS HAVE ANOTHER PERSON WITH YOU WHEN CUTTING!
Other important safety measures:
Chainsaw Chaps and Steel-Toed boots – Most accidents that occur while using a chainsaw cause injury to the body from the waist down. Therefore it is most important to use chainsaw chaps and boots with steel-toed shields.
Protective Helmets – Before cutting a tree down always observe the upper part of the tree for the presence of a “widow maker”. A widow maker is any upper part of a tree that is so fragile from decay or some previous damage that it could break and fall causing serious injury or even death to the tree cutter below. This is why it is very important to wear a helmet for protection when cutting a tree down.
Ear Protection – The loud sound of a chainsaw WILL cause the loss of hearing to unprotected ears. Therefore it is imperative to wear some kind of ear protection devices. Ear protection devices can be purchased from home improvement stores. Ear protection devices used while shooting firearms is a very good way to protect ones ears and can sometimes be priced quite reasonably at stores that sell firearms.
Eye and Face Protection – Wood chips being thrown while cutting with a chainsaw can
cause injury to the face and eyes, even loss of eye sight.
There are chainsaw helmets that have face, eye and ear protection devices attached to them and are usually available at chainsaw dealers.
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