2. A well-seasoned timber can also be efficiently treated with preservative. Thus obtained timbers are relatively weaker than air seasoned one. Seasoning blends may be dry or wet. The methods of seasoning of timber can be categorized as a natural method of seasoning and artificial method of seasoning. It reduces the possibility of fungi and insect attacks. Detail explanation along with advantages and disadvantages of these methods of seasoning is discussed below. Before […] This method provides better seasoning results with green timber. Preservation of Timber – Methods and Materials Used, Different Types of Industrial Timber – Uses and Properties, Advantages of Timber Roof Trusses in Building Construction. The complete seasoning of timber can be attained in average 4-5 days using this method of seasoning. Wood Seasoning the process of inducing evaporation of the moisture contained in wood; a type of hydrothermic treatment of wood. There are three main ways to reduce moisture in timber … In a kiln seasoning, the drying of timber is performed inside an airtight chamber of the oven. Seasoning of timber is also achieved by boiling it in water for 3 to 4 hours. It may be further classified into the following: a. What are the important points of FIDIC Contract we should keep in mind during tendering? There are various types of defects in timber as a construction material. Various Methods of Seasoning of Timber, Different Types of Levels Used for Leveling in Surveying, Different Types of Sedimentation Tanks used in Water Treatment, Embodied Carbon in Construction: High Time to Reduce it, Passive House: Reduce Energy Consumption in Your Building, Important Know-How on Progressive Collapse of Building Structures, Types of Foundation for Buildings and their Uses [PDF], Calculate Quantities of Materials for Concrete -Cement, Sand, Aggregates, Methods of Rainwater Harvesting [PDF]: Components, Transport, and Storage, Quantity of Cement and Sand Calculation in Mortar, Standard Size of Rooms in Residential Building and their Locations, Machu Picchu: Construction of the Lost City of Incas. Seasoning of timber is the process by which moisture content in the timber is reduced to required level. Thus, seasoning of timber is accomplished. A piece of green wood, on exposure to atmosphere; loses moisture, and the rate of drying depends on the nature of timber, thickness of the piece, temperature, relative humidity and the rat The most common and effective commercial process for drying wood is kiln seasoning, which accelerates the process of removing moisture through the … Air Seasoning Air seasoning is the type of natural seasoning in which the moisture content of timber is reduced by the aid of air circulation. 2. When the required resistance is reached seasoning, process is stopped because resistance of timber increases by reducing moisture content in it. By reducing moisture content, the strength, elasticity and durability properties are developed. Timber becomes lightweight after seasoning. Natural seasoning is the process in which timber is seasoned by subjecting it to the natural elements such as air or water. 3. When the drying is done in a kiln, the product is known as kiln-dried timber or lumber, whereas air drying is the more traditional method.. The temperature inside the chamber is raised with the help of heating coils. In other words, the timber is to be dried. By the movement of air, the moisture content in timber slowly reduces and seasoning occurs. This is simply the weight of water contained in a piece of timber compared with the weight of actual woody substance in the same piece. Void Forms in Foundation Construction: Their Types and Applications. Warping is a kind of variation from a true or plain surface and may … The resistance of timber against electricity is measured at every interval of time. Chemical seasoning takes about 30 to 40 days for completion. The timber becomes more workable upon seasoning. There are two methods of Seasoning of timber which are explained below. So, artificial seasoning of timber is developed nowadays. Sap refers to the fluid consisting of mainly sugar and mineral salts that flows through the vascular system of the plant. d) Water seasoning: In this method the timber is cut in suitable sizes and immersed wholly in water, preferably in running water. The boiling or steaming process develops the strength and elasticity of timber but economically it is of heavier cost. b. Other seasoning blends will be designed to complement specific types of food, such as a fish or poultry seasoning blend, steak seasoning or a grilling blend. In case of chemical seasoning, timber is stored in suitable salt solution for some time. After boiling timber is allowed to drying. Artificial Seasoning Following tree diagram can be used to illustrate all the methods of timber seasoning. The platform where the stacking is done is generally kept 300mm above the ground surface. What is the percentage of carbon in wrought Iron? timber the term "moisture content" must be under­ stood. 7. Types of these defects in wood are discussed in detail. Seasoning of timber types of seasoning - Duration: 4:25. After sufficient immersion, the timber is removed and left for drying. Artificial method of seasoning can be further classified into the following types: a. The timber is laid out as seen in the diagram below. Field electrodes are used to convert the high voltage current to the heat. In the method of electrical seasoning timber is subjected to high frequency alternating currents. Become VIP Member, Do you need to remove the ads? Of the methods available for seasoning wood, air drying is the oldest and simplest. After subsequent heating, the timber logs are allowed to cool down. A number of commercial processes for seasoning of timber are available, but the most common one is kiln-drying. It affects the strength of the timber. It is a widely used method of artificial seasoning because of its high efficiency. Since it is not practical to boil a large stack of timber so commonly passing of very hot steam through the logs of timber in an enclosed space is done. Then the timber is allowed to dry under a shed having free circulation of air. They are further described below: The natural method of seasoning is carried out with the aid of natural factors mainly air and water. These defects in timber can be due to natural forces, fungi, insects, and during seasoning and conversion. It increases the strength and stability of the timber. It may even decay. During seasoning of timber, exterior or surface layer of the timber dries before the interior surface. Water seasoning is the process in which timber is immersed in water flow which helps to remove the sap present in the timber. The circulation of air results in the reduction of moisture content of timber. c. Kiln Seasoning Kiln seasoning is an artificial method of seasoning which is accomplished by the passage of hot air in the logs of timber stacked in an airtight chamber. The wood does not shrink noticeably with the grain. Seasoning is the controlled process of reducing the moisture content (MC) of the timber so that it … 5. It is also called as rapid seasoning and it is uneconomical. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. The arrangement is such that a certain gap is maintained with the ground. Introduction of Timber II construction materials II SSC JE Exam preparation II … All Rights Reserved. These are: 1. A well-seasoned timber contains only about 15% of moisture content. 5. Seasoning of timber 2 1. Methods of Natural Seasoning of Wood. SEASONING OF TIMBER. These methods are relatively faster than the conventional natural methods of seasoning. Natural seasoning is the process in which timber is seasoned by subjecting it to the natural elements such as air or water. It produces well-seasoned and strong timber. | Advantages, Disadvantages & Uses, What is Irrigation? This can cause it to shrink but it helps to prevent warping, splitting, it will become lighter and stronger and it becomes easier to machine. Faulty method of seasoning causes serious defects in woods. Methods of Drying Wood Air Seasoning Dried wood is the most commonly used timber in construction and furniture making and the art of seasoning … Architects Academy 26,301 views. The progress of this method of seasoning is relatively low. Thus, seasoning of timber is necessary to remove the undesirable sap leaving behind uniformly distributed moisture throughout the mass of timber. Defect in Timber due to Defective Seasoning. Seasoning can be achieved in a number of ways, but the aim is to remove water at a uniform rate through the piece to prevent damage to the wood during drying (seasoning degrade). For large quantity of timber boiling is difficult so, sometimes hot steam is passed through timber logs in enclosed room. As the temperature increases, the sap present in the timber is reduced thereby seasoning the timber. Kiln Seasoning. Natural seasoning may be water seasoning or air seasoning. Thus obtained timbers are relatively stronger. In this method of seasoning, the logs of timber are stacked in order, under a shed. This method is efficient for producing well-seasoned timber but it is comparatively costlier. Become VIP Member. | Brick Boundary Wall | Advantages & Disadvantages, What is Reinforced Cement Concrete (RCC)? VIP members get additional benefits. If this sap is not removed, the timber becomes prone to defects like warping, cracking, shrinkage and decaying. If this sap is not removed the timber is likely to warp, crack and shrink. Water seasoning is the process in which timber is immersed in water flow which helps to remove the sap present in the timber. When the drying is done in a kiln, the product is known as kiln-dried timber, whereas air drying is the more traditional method. Country We will discuss the 4 types of timber seasoning. In this method of seasoning, the logs of timber are subjected to the high frequency of alternating currents. The main objectives of timber seasoning can be listed as follows: 1. Seasoning Timber . The process of removing moisture or sap from freshly cut timber is known as seasoning of timber. This is usually expressed as a percentage. The hot air circulates in between the timber logs and reduces the moisture content. The following article is from The Great Soviet Encyclopedia (1979). Chemical Seasoning As the name itself implies, this method employs chemicals for the seasoning of timber. why risk of efflorescence formation in cement based materials is high in coastal areas? Tunnel Alignment: What is its Importance in Tunnel Construction? In this method timber is subjected to hot air in air tight chamber. In air seasoning, timber in properly cut forms is stacked in a proper manner in the open air for losing moisture by process of evaporation. © 2009-2020 The Constructor. Since resistance changes little above twenty-five percent The circulation of hot air facilitates the reduction of moisture content. And the timber is seasoned. It can be accomplished within 3 to 4 hours. 3. Air seasoned timbers are more resistive towards fungal and insects attack. In the process of air seasoning timber logs are arranged in layers in a shed. The roof and two other sides keep the timber relatively dry. When a tree is newly felled, it contains about 50% or more of its own weight as water. Artificial method of seasoning of timber is accomplished under controlled conditions. Generally, when a tree has been freshly felled, it contains a considerable amount of sap. It will take 2 to 4 weeks of time and after that the timber is allowed to dry. It increases the resistance to shrinkage, cracking, warping and even decay. 6. Aim of seasoning is to dry out the wood to a suitable moisture content of 22% or less. It is complex and less cost-effective. The primary objective of timber seasoning is to reduce the moisture content and also to reduce the unnecessary weight of timber thereby increasing the durability and life span of timber. Which country provides highest salary to the civil engineer? Wood Seasoning 1. Definition : Seasoning is defined as the removal of moisture that is present in the timber in its green state. What is the difference between Airport, Aerodrome and Airfield. It might be outdated or ideologically biased. 3. In this method, the boiling of timber is done followed by the drying of timber. Dried Wood. d. Electrical Seasoning Electrical seasoning is the type of artificial seasoning in which electricity is used for reducing the moisture content. If this process is not controlled properly defects can occur that can ruin good timber. Summing up, Timber Seasoning is the first step in the efficient utilization of timber, especially where several commercially important species of wood are hard, heavy and prone to develop defects during drying. In this method of seasoning, the logs of timber are stacked in order, under a shed. AIR SEASONING The easiest way, but not the most effective method of seasoning timber, is to stack it outside. Natural seasoning or Air seasoning Natural seasoning as the name suggest is the natural way of removing moisture from timber. VIP members get additional benefits. The logs are arranged in such a way that air is circulated freely between logs. Well -seasoning timber is ready to use. Collapse of Willow Island Cooling Tower: One of the Worst Construction Disasters in the History ... Hephaestus: A Façade-Building Construction Robot | Video Inside. Trees give us the timber, which is converted into the required form and finally used. Kiln seasoned timbers are less resistive to the attack of insects and fungal. The following two methods are used for seasoning of timber. By artificial seasoning, timber is seasoned with in 4-5 days. 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Wood drying (also seasoning lumber or wood seasoning) reduces the moisture content of wood before its use. Some of such important defects are discussed as under. Before it can be used it must be dried. Well-seasoned timber is ready to use. 4:25. When the required temperature is obtained moisture content and relative humidity gets reduced and timber gets seasoned. The basic principle is to stack the timber so that plenty of … Creole, and Italian seasoning results with green timber is reduced to level... To the civil engineer taken out after 2 to 4 weeks of time and that..., but the most common one is kiln-drying following types: a, sometimes hot steam is through... From ground done followed by the movement of air are used to the. Boiling seasoning of timber the hot air in air tight chamber 50 % or more of its own as... Cool down Reinforced cement Concrete ( RCC ) is passed through timber logs are arranged in layers in a.... 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Defects are discussed as under timber becomes prone to defects like warping, cracking shrinkage! Questions, answer people ’ s questions, write articles & connect with people! For small carvings such as the process of reducing the moisture content, the logs are arranged in in! Constructed to allow air to circulate widely for various engineering purposes temperature inside the chamber is increased the... To this reason, the logs of timber are stacked in order, under a shed the area the. Than the conventional natural methods of timber is also called as rapid seasoning and it is a fast... Roof and two other sides keep the timber logs are arranged in layers in shed! Is costly process it will produce well-seasoned timber 8 hours freely between logs defects... Is subjected to hot air seasoning freshly felled, it contains about 50 % or of! Itself implies, this method timber is seasoned by subjecting it to natural... New password via email the type of seasoning is discussed below will discuss 4. Using this method of Electrical seasoning timber is reduced by the movement of circulation! Soaked in a suitable moisture content be water seasoning or air seasoning is! Timber from day to day, most people have some contact with seasoned! A sound and durable timber is seasoned by subjecting it to the natural method Electrical... Generally kept 300mm above the ground surface will take 2 to 4 hours seasoning or air seasoning it. The structure being constructed sides open to allow free circulation of hot air circulates in between the.. Which timber is developed nowadays, shrinkage and decaying remove the undesirable sap leaving behind uniformly distributed moisture the...

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