Name: engineered wood products in construction
Uploaded: 2024-09-12T16:16:32.000Z
Duration: 1 min 21 s
Channel: JoVE

목재 제품은 목재 가닥, 베니어판, 목재 및 목재 파편과 같은 폐기물을 구조적 및 비구조적 응용 분야를 위해 접착하여 형성됩니다.
접착제로 적층된 목재는 수많은 작은 차원 목재 조각을 접착제와 결합하여 얻습니다.
교차 적층 목재는 단단한 목재로 만든 구조 패널로, 나무 조각의 결 방향이 각 층 사이에서 번갈아 나타납니다.
못 라미네이트 목재는 나란히 놓인 치수의 목재 조각으로 만들어지며 못이나 나사로 고정됩니다.
대조적으로, 다웰 라미네이트 목재는 유사한 절차를 따르지만 금속 패스너 대신 노련한 나무 다웰을 사용합니다.
적층 스트랜드 목재는 직사각형 모양으로 만들어지고 압력 하에서 가열 경화되는 더 긴 접착제 코팅된 파쇄된 목재 스트랜드를 사용하여 생산됩니다.
반면에 방향성 스트랜드 목재는 유사한 과정에 따라 더 짧은 스트랜드로 만들어집니다.
이 공정은 또한 균일한 평행 방식으로 배열된 얇은 베니어 스트립에 적용될 때 평행 가닥 목재를 생산합니다.
라미네이트 베니어 목재는 각각 최종 제품의 깊이만큼 넓은 얇은 목재 베니어 시트를 함께 접착하여 더 두껍고 견고한 구조 부재를 형성하여 얻습니다.

목재 제품

Wood Products

목재 제품은 구조적, 비구조적 목적으로 설계된 목재 가닥, 합판, 목재, 심지어 폐목재 같은 조각으로도 만들어진 광범위한 재료를 포함합니다. 건물 응용 분야에서 여러 특수 목재 제품이 개발되어 강도, 내구성 및 다양성을 향상되었습니다.

종종 글루램이라고 불리는 구조용 집성재는 여러 개의 작은 차원 목재 조각을 결합하여 하나의 더 큰 조각을 만듭니다. 구조용집성판은 단단한 목재로 만든 구조 패널로 구성되며, 목재의 결 방향이 번갈아 배열되어 패널의 강도와 안정성을 향상시킵니다.

못접합 구조용집성판은 각재를 나란히 놓고 못이나 나사로 고정하여 만듭니다. 목다보접합 구조용집성판의 구조도 유사하지만 금속 파스너를 숙성된 목재 목다보로 대체하여 금속과 관련된 열교 현상을 방지합니다.

적층 스트랜드 목재와 배향 스트랜드 목재는 모두 각각 길거나 짧은 목재 가닥을 접착제로 코팅한 다음 압력을 가해 열경화 시켜 강하고 균일한 패널을 형성합니다. 평행 스트랜드 목재는 얇은 합판 스트립을 평행하게 배열한 후에 접착 및 경화합니다.

적층 합판 목재는 여러 겹의 목재 합판을 같은 방향으로 접착하여 여러 구조적 응용 분야에 사용되는 두껍고 강한 부재를 만듭니다.

이러한 혁신적인 목재 제품은 현대의 건축 프로젝트에서 향상된 성능과 지속 가능성을 제공합니다.

목재 제품은 목재 가닥, 베니어판, 목재 및 목재 파편과 같은 폐기물을 구조적 및 비구조적 응용 분야를 위해 접착하여 형성됩니다.
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Education

교육

JoVE Core

Civil Engineering

토목공학

Unit 1

제1단원

Wood

나무

KEY TERMS AND CONCEPTS

주요 용어 및 개념

engineered wood products in construction

Engineered wood products are made from wood strands, veneers, lumber, and even waste wood shreds. They are used in both structural and nonstructural building applications. These materials are designed to improve strength, durability, and versatility in modern construction.

Glue-laminated wood, or glulam, is made by bonding several smaller pieces of dimensional lumber with adhesive. Cross-laminated timber uses solid lumber panels with layers placed so the grain direction alternates. This layer pattern helps improve panel strength and stability.

Other wood products use different fastening methods. Nail-laminated timber is made by placing dimensional lumber side by side and joining the pieces with nails or screws. Dowel-laminated timber uses the same basic layout, but it uses seasoned wooden dowels instead of metal fasteners. Using wood dowels can avoid the thermal bridging that can happen with metal.

Some products are built from wood strands or veneers. Laminated strand lumber and oriented strand lumber are both made by bonding wood strands, with longer strands in laminated strand lumber and shorter strands in oriented strand lumber. The strands are coated in adhesive and heat-cured under pressure to form strong, uniform panels. Parallel-strand lumber uses thin veneer strips arranged in parallel before bonding and curing. Laminated veneer lumber is made by gluing multiple layers of veneer in the same direction to create a thick, strong member for structural use.

Engineered Wood Products in Construction

introduction to wood

Wood Structure and Uses in Building

Wood is a construction material made from trees. A tree trunk has several layers. The outside is a protective layer of dead bark. Under that is living bark, then the cambium, then sapwood. As sapwood matures, it becomes heartwood. The pith sits at the center of the trunk. The age of a tree can be read from its growth rings. These rings are concentric bands seen in a trunk cross-section. Wood strength also depends on grain. Grain refers to elongated, tubular cells that run along the length of...

softwoods and hardwoods

Wood Grain in Softwoods and Hardwoods

Softwoods and hardwoods come from different kinds of trees, and their leaf structures and cell makeup help explain how they are used. Softwoods come from cone-bearing trees with needle-like leaves. Hardwoods usually come from trees that shed broad leaves seasonally. Softwoods are made mostly of long cells called tracheids and a smaller number of rays, which are radial cells. This simpler structure gives softwoods a rougher grain. Because of this, they are often used in construction for...

lumber

Lumber Cutting Methods

Lumber is made from logs that are harvested, debarked, and processed into long pieces with a rectangular cross-section. The process starts when an automated saw slices a log into slabs. Those slabs then move on a conveyor belt to smaller saws, where they are cut into square-edged pieces of specific widths. Freshly cut lumber usually has rough surfaces. Its dimensions may also vary slightly from one end to the other. The way wood is cut affects both the lumber’s appearance and how it is used. <br...

structural properties and dimensions of lumber

structural-properties-and-dimensions-of-lumber

Wood Strength Tests and Lumber Sizes

Wood strength depends on how its fibers are aligned along the length of the tree. This alignment gives wood much greater tensile strength along the grain than across it, sometimes up to twenty times higher. Wood also tends to perform better under compression than under tension. Fiber length varies by wood type. Hardwoods have fibers about one twenty-fifth of an inch long. Softwoods have longer fibers that range from one-eighth to one-third of an inch. Laboratory tests help measure how wood...

seasoning of wood

Wood Drying for Stronger Construction

Seasoning of wood is the drying process used to lower and stabilize moisture content before wood is used in construction. Fresh wood can swell when it takes in moisture and contract as it dries. Seasoning helps reduce that movement so the wood stays more stable after it is built into a structure. The main goal is to reach equilibrium moisture content. This is the point where the wood’s moisture level matches the moisture in the surrounding environment. When wood is seasoned properly, it is...

wood surfacing

Wood Surfacing for Smooth, Safe Lumber

Wood surfacing smooths lumber, improves its size accuracy, and makes it safer to handle. It is a key finishing step in woodworking and construction. The process also helps correct small distortions that can form as wood dries. Before surfacing, the wood may be sized slightly larger to account for shrinkage during seasoning, which is the drying stage. A plane, a tool with rotating blades, is used to remove material and smooth the surface. The same tool can also round the edges a little, which...

lumber defects

Common Wood Flaws in Lumber

Lumber defects are flaws in wood that can change both its appearance and its strength. These defects come from tree growth and from the way lumber is processed. Knowing the main defects helps explain why some boards are better for construction and manufacturing than others. Some defects begin in the tree itself. Knots form where branches were once attached to the trunk, and knotholes appear when those knots fall out. Decay and insect damage are also natural defects that can weaken wood and...

wood fasteners

Wood Fastener Types and Uses

Wood fasteners connect parts of a wood structure and help keep members in place. The strength of the connection depends mainly on direct bearing between the wood members. Different fasteners are chosen for different jobs and structural needs. Nails are the most common wood fasteners. They are sharp-pointed metal pins that are driven into wood with a hammer or a mechanical nail gun. Nails come in many diameters, head styles, and lengths. Nailing methods also matter. Face nailing places the...

veneer

How Veneer Is Cut and Used

Veneer is a thin sheet of wood that is usually about one-eighth of an inch thick or less. It is made to show the look of wood while using timber more efficiently. Veneer is common in furniture and other finished wood products. One common way to make veneer is rotary cutting. In this method, a log is mounted in a large lathe and spun against a knife edge. As the knife moves deeper into the turning log, it peels off a continuous strip of wood. This creates rotary-cut veneer. Other veneer...

wood products

Engineered wood products are made from wood strands, veneers, lumber, and even waste wood shreds. They are used in both structural and nonstructural building applications. These materials are designed to improve strength, durability, and versatility in modern construction. Glue-laminated wood, or glulam, is made by bonding several smaller pieces of dimensional lumber with adhesive. Cross-laminated timber uses solid lumber panels with layers placed so the grain direction alternates. This layer...

wood panel products

Types of Wood Panels in Construction

Wood panels are common construction materials used for flooring, siding, and roofing. They usually come in standard 4-foot by 8-foot sheets. Their thickness can range from one-quarter of an inch to one and one-eighth inches. Plywood is one of the most familiar wood panels. It is made by gluing thin wood veneers, or layers, under pressure. The outer veneer grain runs lengthwise, while the inner layers run widthwise. Plywood also has an odd number of layers, which helps keep the panel...

key terms and concepts

Learn how glulam, CLT, nail-laminated timber, and other engineered wood products are made from lumber, strands, and veneer for strong building uses.

Engineered Wood Products in Construction | JoVE K12

JoVE Core Civil Engineering offers a foundational exploration of essential construction materials such as bricks, stones, steel, wood, and concrete, along with fluid mechanics topics like flow over immersed bodies, open channel flow, and dimensional modeling. It also covers key surveying concepts, including leveling, traverse adjustments, curve design, topographic mapping, and geospatial technologies (GPS & GIS). Science-in-action videos showcase laboratory research on materials, fluids, and surveying practices in real-world engineering systems.

civil engineering

Engineered Wood Products in Construction

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