Weight of timber: the effect of weight on the general

In the construction of a log house, the weight of a 100x100 timber or larger section always plays a certain role, and in several directions at once.

The weight may depend on:

• Foundation type. The collection of loads of the whole house must take into account the load that the material gives.
• Type of roof. With a large weight of wood, it is possible and necessary to rationally approach the roofing material, and choose a lighter one.
• Exterior finish, in this case, lining a brick, which also will give an additional load on the base of the house.

Weight difference and its effect

Immediately it is necessary to clarify that there is not a single universal indicator of how many kilograms there are in a single cube of material.

After all, this indicator always depends on several points:

• Type of wood. There are dense, heavy varieties of wood, there are lighter ones.
• Section, то есть толщина материала.
• Humidity.

For example, one of the most popular varieties for the construction of log cottages - pine, is quite different in weight from where it grows. Pine in central Russia, and beyond the Urals, it can be said to be completely different wood. And there will still be quite a lot of such natural nuances.

At the same time, it is necessary to realize that along with the fact that there is a weight of a house from a bar, there is also a rational approach to the thickness of the wood, that is, the thickness of the walls. From the last moment depends not only the load, but also further work on finishing, insulation, lining.

Rock difference

To begin with, we will define the wood species that are most often used as a material:

• Spruce, cedar, linden, fir, poplar.
• Pine, willow, alder, aspen
• Larch, birch, elm, elm, chestnut.
• Oak, beech, acacia, hornbeam, ash.

At the same time, the difference in kilograms is within 200 kg from the lightest, linden, for example, to the heaviest oak, and all this is the weight of 1 cubic lumber.

In addition, you can still divide the difference in weights, depending on the state of the wood, it is:

• Dry The difference between all breeds is on average 100-150 kg.
• Air dry. Here the difference can be at the level of 50-100 kg per 1 cubic meter.
• Raw wood, a difference of 50-100 kg.
• Freshly cut wood. The difference in weight in one cubic meter from 0 to 200 kg.

It should also explain what the condition of the timber and terminology means:

• Dry This type of wood goes through a special drying at the manufacturing plant, or it is stored for a rather long time in a specially equipped room. In addition, the question of how much a cube of a beam weighs in such a state will receive the answer with the smallest number.
• Air dry. This term means that the humidity of the timber is balanced with the humidity of the air. You can also call this type - natural drying, and this option remains the most preferred for wood.
• Raw wood is rarely used in construction, but with the purchase it does not matter, but it is more difficult to transport it.
• Fresh-cut and wet, this is freshly felled wood or a long time arriving in water. In principle, this type has the least relation to a bar.

Section

Now it’s worthwhile to talk about how a section of material can influence the weight of m3 of glued laminated timber, for example. The fact is that it is sometimes necessary to count the material for the construction of a house not only in total cubic capacity, but also individually, on the basis of how many pieces of timber will be required.

And knowing some numbers, you can simply calculate and bar piece.

In order to consider on a practical example the influence of the cross section on the weights, we can take a pine timber.

So, the average weight of one cubic meter of svezhespilennogo and processed into suitable lumber pine timber is 860 kg, then the picture will be as follows:

• Section 200х200 мм – 209,7 кг.
• 200x150 mm - 156 kg.
• 200x100 mm - 103 kg.
• 150x150 mm - 116 kg.
• 100x100 mm - 52 kg

Note! All dimensions of the section are given taking into account the fact that the length of one beam is standard 6 meters.

How can numbers be used

By numbers is meant the specific weight of the wooden beam, which is of most interest. First of all, knowing how many kilograms a cubic meter goes, and even better, one piece of material, you can carry out design work.

In other words, this is the main point in the collection of loads, which is vital for developing the foundations of the foundation for a log house.

How can you "play" these values: you can give a few examples:

• The first crown of the box at home can be made up of a large section beam.
• Subsequent crowns, from a bar of smaller section.
• Interior partitions are from a smaller section, and this again reduces the overall load.

Load

Now it is worth considering the moment of gathering loads in more detail, but in order to understand and calculate how much a house weighs from a bar. This will require an example of the house, and to make it easier to count, you can take the house 10x10.

Now in order:

• The perimeter of the house - 40 meters.
• The first crown is 200x200m, you will need 7 pieces. Given that the piece is 210 kg, then the first crown will weigh - 7 * 210 = 1470 kg.
• Then you can use the bar section 200x150. And the calculation is made on the basis of cubic walls.

Take the perimeter, 40 meters, the height of the wall of timber, 2.8 meters, and the thickness of the material - 200 mm. Calculated volume, 40 * 2.8 * 0.2 = 22.4 cubes.

Now you need to subtract the windows and the door from here. In order not to count for a long time, just 20% is subtracted, and of that it is 22.4-4.5 cubes = 17.9 cubic meters.

Considering that one cube weighs 860 kg, it turns out that without the first crown, 860 * 17.9 = 15.394 kg will be required for a 10x10 house box.

Thus, the box of the first floor weighs 15.4 + 1.5 = 16.9 tons. Rounded numbers.

Now, after such an accurate calculation of the box, you can make certain conclusions. Instructions for calculating the power of the foundation will require the collection of loads, and here it may be necessary to calculate by the piece even the entire beam.

It is not difficult to do, on the example of the same 10X10 house, the principle is as follows:

• The perimeter is 40 meters.
• One crown, for example, with a section of 200x200, is 7 pieces.
• The height of the walls, 3 meters.
• Accordingly, 15 crowns will be required, 15 * 0.2m = 3 m.
• Further in 15 crowns is located 15 * 7 = 105 pieces of a bar.

By the same principle, it is possible to calculate the required number of beams for internal partitions. True, this is not about the perimeter, but the running meters and the height of the partitions, plus the section of the material are taken into account.

Then calculated the second floor, or attic.

Roof

Timber is used in the construction of the roof. Here, of course, there is a slightly different section, but the price of the roof, in any case, is formed in the same way as the weight, according to cubic capacity!

Calculate everything here is not difficult, for example, you can show the roof of the house 8X6:

• The length of the rafter 5 meters.
• 60 cm pitch
• Roof двускатная простая.

You need 14 rafters on each side of the house, or 28 pieces. Further, the section of the rafter is simply selected, and on its basis, the calculation of the cubic capacity, and the weight and cost, is performed, ultimately.

Conclusion

Almost all the work on the counting can be done by hand, at least, arithmetic surveys, which will not require any special education or complex counting systems.

However, all this manipulation, help yourself to understand how much it will take for normal construction, and try to bring an estimate of expenses in order, or start thinking in rational categories. A video in this article has prepared a visual overview of the topic.