Question

Ответьте на вопросы пожалуйста Wood has been a highly used building material since prehistoric times. Among other highly used construction materials there are concrete, steel, brick, stone, and plastics. They all differ in their properties and in the methods of usage. Construction materials are known to differ in strength, hardness, fire- and corrosion-resistance durability, and, naturally, cost. Being the oldest building material, wood is also known to be the only naturally growing organic material. Is wood strong? Hardly so, because wood always contains some water which decreases its strength. But after the wood is cut, the water content starts to evaporate and as the water content decreases the strength of the cut wood and its hardness start to increase. It is a well-known fact that the drier is the cut wood the greater is its strength and hardness. Trees are known to grow naturally, which makes wood a constantly renewable natural resource. Among other advantages of wood there are its low cost, low weight, and high workability. But, as any other construction material, wood has its disadvantages. The main ones are the following - it is not fire-resistant, it easily burns. Besides, it easily decays. Wood used for construction purposes is usually changed into laminated wood or wood panel products. Large structural wooden members are produced by glueing small strips of wood together. Wood in panel form is more advantageous for many building purposes than boards. Why is it so? First of all, because wood panels are much easier to install than boards. They require much less labour for the process of installation. Besides, swelling (набухание) and splitting (расщепление) in panels are greatly decreased compared with boards. As to plywood panels, they are made up of thin wooden veneers glued together. It is of great importance to note that when wooden structures are designed the future stresses of their structural members must be predetermined. Ответьте на вопросы 1. Does wood as a structural material have only advantages? If not, what are its disadvantages? 2. Is wood a strong building material? If not, why? 3. Does the water content in the cut wood increase or decrease? 4. What forms is wood changed into? And for what purposes? Compare wood in panel forms with boards. What do they differ in? 5. What elements are plywood panels made up of?

Answer 1

Ответ: 1 вопрос)Yes, there is since wood is used in paper and air purification

2вопрос)It seems to me that yes, wood is a strong drill material. But most often it is used as a construction of houses.

3вопрос)

Decreases because no tree sap comes from the roots

4вопрос)because the panel boards cut and make the desired shape and the tree has a peculiar shape

5вопрос)from internal wood

Объяснение: всё надеюсь помогла)

Answer 2

1. No, wood as a structural material has both advantages and disadvantages. Some of its disadvantages include being flammable and prone to decay. Additionally, it requires regular maintenance to prevent deterioration from moisture, insects, and fungi.

2. Wood is not inherently a strong building material. Its strength can be affected by factors such as the species of wood, its moisture content, and its structural design. The presence of water in wood decreases its strength, but as the water content decreases (through drying), the strength and hardness of the wood increase.

3. The water content in cut wood decreases as the wood dries. So, the water content in cut wood decreases rather than increases.

4. Wood is changed into different forms for various purposes in construction. Some common forms include laminated wood or wood panel products. Large structural wooden members can be produced by gluing small strips of wood together. Wood panels, such as plywood, are made up of thin wooden veneers glued together. These forms offer advantages such as ease of installation, reduced swelling and splitting compared to boards, and increased structural stability.

5. Plywood panels are made up of thin wooden veneers glued together. These veneers are typically cross-laminated, meaning the grain direction of adjacent layers is perpendicular to each other. This cross-lamination increases the strength and stability of plywood, making it a versatile and widely used building material.