The terms “hardwood” and “softwood” are often misleading because they have no direct relation to the actual physical hardness or softness of the wood, so that a hardwood may actually be softer than a softwood.
All you need to know about timber in just a single ppt with interesting slides. Hope it hlps! This ppt was created as the result of a teamwork with my classmates
Timber - Types of Woods, Plywood, Veneer, Laminate, Blockboard with Market Su...Uma Pandey
Presentation for Interior Students. Market survey on Timber (Plywood, Veneer, Laminate etc) with their prices, thickness and Sizes available in the market
An introduction to Arches:-- It explains the basic understanding about Arches before students start drafting in their drawing sheets. This presentation could be shown to first year B.Architecture students to make them a clear idea about Arches.
All you need to know about timber in just a single ppt with interesting slides. Hope it hlps! This ppt was created as the result of a teamwork with my classmates
Timber - Types of Woods, Plywood, Veneer, Laminate, Blockboard with Market Su...Uma Pandey
Presentation for Interior Students. Market survey on Timber (Plywood, Veneer, Laminate etc) with their prices, thickness and Sizes available in the market
An introduction to Arches:-- It explains the basic understanding about Arches before students start drafting in their drawing sheets. This presentation could be shown to first year B.Architecture students to make them a clear idea about Arches.
WOOD - As a Material
types - hard wood, soft wood, description, manufactured boards, joining methods, adhesives used, types of adhesives, types of hardware, screws used, types of nails, joints, all the joinery sketches, knock down fittings and everything about wood.
WOOD - As a Material
types - hard wood, soft wood, description, manufactured boards, joining methods, adhesives used, types of adhesives, types of hardware, screws used, types of nails, joints, all the joinery sketches, knock down fittings and everything about wood.
STEEL IN ARCHITECTURE-CONTEMPORARY ARCHITECTUREMohd Azmatullah
Steel is crucial in development of economy and is considered as backbone of human civilization.
* Important milestones in Architecture was development of iron and steel in construction.
*New Method based in industrialization
DRYCONSTRUCTION, RATIONAL SUSTAINABILITY, RECIYCLING
*Steel buildings and bridges were being built in the latter part of the 19th century and early 20th century during the British era,
*New trend:-
Structural steel selectively used in the construction of high-rise buildings with 2-4/ projects/ year in India, mainly in metropolitan cities those are constrained by limited land availability.
*The evolution of steel frame construction in the 20th century entirely changed the concept of the Wall and the support.
*Steel is typical because of high tensile and compressive strengths
*steel buildings save time and money as compared to conventional building systems.
*Strong internal demand and emphasis on developing infrastructure can be expected to remain the foundation of Economic growth.
Industry and infrastructure segments can be expected, the key demand drivers for steel structures in India over the next 5 years.
*Overall, there is good potential for steel structures in India owing to robust economic growth, increased government spending on infrastructure and change in mindset with regards to use of structural steel in building.
Postmodern architecture is a reaction and evolution to the modern architecture that came before it. Not only did designers begin to make use of new innovations, but at the same time they appropriated design elements from the past. Buildings became an eclectic mix of old and new as the old "Form follows function" mantra was forgotten. One of the iconic postmodern examples is the Sony Building in New York City.
As with many cultural movements, some of postmodernism's most pronounced and visible ideas can be seen in architecture. The functional and formalized shapes and spaces of the modernist movement are replaced by aesthetics: form is adopted for its own sake, and new ways of viewing familiar styles and space abound.
Classic examples of modern architecture are the Lever House and the Seagram Building in commercial space, and the architecture of Frank Lloyd Wright or the Bauhaus movement in private or communal spaces.
Transitional examples of postmodern architecture are the Portland Building in Portland, Oregon and the Sony Building in New York City, which borrows elements and references from the past and reintroduces color and symbolism to architecture.
Neo-futurism is a late 20th–early 21st century movement in the arts, design, and architecture. It is a departure from the cynical attitude of post-modernism and represents an idealistic belief in a better future and "a need to periodize the modern rapport with the technological".
This avant-garde movement is a futuristic rethinking of the aesthetic and functionality of rapidly growing cities.
The industrialization that began worldwide following the end of the Second World War gave wind to new streams of thought in life, art and architecture, leading to post-modernism, neo-modernism and then neo-futurism.
In the Western countries, futurist architecture evolved into Art Deco, the Googie movement and high-tech architecture, and finally into Neo-Futurism.
Neo-futuristic urbanists, architects, designers and artists believe in cities releasing emotions, driven by eco-sustainability, ethical values and implementing new materials and new technologies to provide a better quality of life for city-dwellers.
Neo-futurism has absorbed sоme оf the high-tech architecture’s themes аnd ideas, incorporating elements оf high-tech industry аnd technology іntо building design: technology and context is the focus of some architects of this movement such as Buckminster Fuller, Norman Foster, Kenzo Tange, Renzo Piano, Richard Rogers, Frei Otto, and Santiago Calatrava.
MODERNISM FIRST EMERGED IN THE 1920.THE PROMINENT FIGURES OF THE MOVEMENT ARE LE CORBUSIER ,WALTER GROPIUS AND LUDWIG MIES VAN DER ROHE.
HOWEVER IT WAS NOT UNTIL AFTER THE SECOND WORLD WAR THAT IT GAINED MASS POPULARITY, AFTER MODERNIST PLANNING WAS IMPLEMENTED AS A SOLUTION TO THE PREVIOUS FAILURE OF ARCHITECTURE AND DESIGN TO MEET BASIC SOCIAL NEEDS.
IN THE POST WAR ERA, THE AMBITIONS OF THE MODERNIST AND THEIR” STRONG SENSE OF SOCIAL RESPONSIBILITY IS THAT ARCHITECTURE SHOULD RAISE THE LIVING CONDITIONS OF THE MASSES”.
CHARACTERISTICS OF MODERNISM:
THE NOTION THAT "FORM FOLLOW FUNCTION”, EXPRESSED BY FLW,S EARLY MENTOR LOUIS SULLIVAN, MEANING THAT THE RESULT OF DESIGN SHOULD DERIVE DIRECTLY FROM ITS PURPOSE.
SIMPLICITY AND CLARITY OF FORMS AND ELIMINATION OF “UNNECESSARY DETAIL”.
MATERIALS AT GO DEGREES TO EACH OTHER.
VISUAL EXPRESSION OF STRUCTURE (AS OPPOSED TO THE HIDING OF THE STRUCTURAL ELEMENTS)
THE RELATED CONCEPT OF” TRUTH TO MATERIAL”, MEANING THAT THE TRUE NATURE OR NATURAL APPEARANCE OF MATERIAL OUGHT TO BE SEEN RATHER THAN CONCEALED OR ALTERED TO REPRESENT SOMETHING ELSE.
USE OF INDUSTRIALLY PRODUCED MATERIALS; ADOPTION OF THE MACHINE AESTHETICS.
PARTICULARLY IN INTERNATIONAL STYLE MODERNISM, A VISUAL EMPHASIS ON HORIZONTAL AND VERTICAL LINES.
Late Modernism encompasses the overall production of most recent architecture made between the aftermath of World War II and the early years of the 21st century. The terminology often points to similarities between late modernism and post-modernism although there are differences.
Late Modernism, also known as High-tech architecture or Structural Expressionism, is an architectural style that emerged in the late 80s, this style became a bridge between modernism and postmodernism.
Architecture in which the images, ideas, and motifs of the Modern Movement were taken to extremes, structure, technology, and services being grossly over stated at a time when Modernism was being questioned.
In the year 1980s the high tech architecture started to look different from the post modern architecture. Many of the themes and ideas which originated during the post modern times were added to the high tech architecture.
Modern architecture is primarily driven by technological and engineering developments, and it is true that the availability o f new building materials such as iron, steel, and glass drove the invention of new building techniques as part of the Industrial Revolution.
High-tech architecture, also known as Late Modernism or Structural Expressionism, is an architectural style that emerged in the 1970s, incorporating elements of high-tech industry and technology into building design.
High-tech architecture appeared as a revamped modernism , an extension of those previous ideas helped by even more technological advances.
This category serves as a bridge between modernism and post-modernism ; there remain gray areas as to where one category ends and the other begins. In the 1980s, high-tech architecture became more difficult to distinguish from post-modern architecture. Some of its ideas were later absorbed into the style of Neo-Futurism art and architectural movement.
EARLY MODERN ERA
culmination of iron-frame architecture (Crystal Palace, Eiffel Tower),Chicago school: skyscrapers (Jenney), functionalism (Sullivan)
international style (Gropius, Corbusier, Mies),Wright (organic architecture
It is a development in POST-MODERNISM that started in late 1980s.
It views architecture in bits and pieces.
It has no visual logic.
Buildings may appear to be made of abstract forms.
The idea was to develop buildings which show how differently from traditional architectural conventions buildings can be built without loosing their utility and still complying with the fundamental laws of physics.
The ideas were borrowed from the French philosopher, Jacques Derrida.
Architects involved –
Zaha Hadid
Bernhard Tschumi
Rem Koolhaas
The term ‘Critical Regionalism’ was first coined by Alexander Tzonis and Liane Lefaivre and later more famously and pretentiously by Kenneth Frampton in “Towards a Critical Regionalism : Six points of an architecture of resistance”
According to Frampton, critical regionalism should adopt modern architecture critically for its universal progressive qualities but at the same time should value responses particular to the context. Emphasis should be on topography, climate, light, tectonic form rather than scenography and the tactile sense rather than the visual.
According to Tzonis and Lefaivre, critical regionalism need not directly draw from the context, rather elements can be stripped of their context and used in strange rather than familiar ways.
Critical regionalism is different from Regionalism which tries to achieve a one-to-one correspondence with vernacular architecture in a conscious way without consciously partaking in the universal.
It is considered a particular form of post-modern response in developing countries, not to be confused with postmodernism as architectural style.
Works Of Gustave Eiffel,Tony Garnier, Auguste Perret Development Of New Art &...Anant Nautiyal
Works Of Gustave Eiffel,Tony Garnier, Auguste Perret
Development Of New Art & Architecture , Art Nouveau & Art Deco
Works Of Antonio Gaudi & Victor Horta.
The building envelope is physical separator between the exterior and the interior of the building and fenestration systems.
Envelope design strongly affects the visual and thermal comfort of the occupants, as well as energy consumption in the building.
The Taj Mahal of Agra is one of the Seven Wonders of the World, for reasons more than just looking magnificent. It's the history of Taj Mahal that adds a soul to its magnificence: a soul that is filled with love, loss, remorse, and love again.
This man was the Mughal Emperor Shah Jahan, who was head-over-heels in love with Mumtaz Mahal, his dear wife. She was a Muslim Persian princess and he was the son of the Mughal Emperor Jahangir and grandson of Akbar the Great.
It was in the memory of his beloved wife that Shah Jahan built Taj Mahal ,a magnificent monument as a tribute to her.
The construction of Taj Mahal started in the year 1631. Masons, stonecutters, inlayers, carvers, painters, calligraphers, dome-builders and other artisans were requisitioned from the whole of the empire and also from Central Asia and Iran, and it took approximately 22 years to build what we see today. which was brought in from all over India and central Asia. Taj Mahal was finally completed in the year 1653.
A brick is a block or a single unit of a ceramic material used in masonry construction. Typically bricks are stacked together or laid as brickwork using various kinds of mortar to hold the bricks together and make a permanent structure.
Bricks are typically produced in common or standard sizes in bulk quantities. They have been regarded as one of the longest lasting and strongest building materials used throughout history.
Cement is a building material for binding bricks, stones or aggregates.
Used for making mortar or concrete.
Cements natural and artificial.
Natural cement-burning and crushing of stones and lime.
Artificial cement-burning at high temperature and gypsum is added.
Sand is a naturally occurring granular material composed of finely divided rock and mineral particles.
the most common constituent of sand is silica (silicon dioxide, or SiO2), usually in the form of quartz.
The term Romanesque ("Roman-like") was first used to designate a style of architecture that used Roman arches and had thick, heavy walls, based upon the basilica. The style is pervasive throughout Europe.
Gothic architecture, architectural style in Europe that lasted from the mid 12th century to the 16th century, particularly a style of masonry building characterized by cavernous spaces with the expanse of walls broken up by overlaid tracery. In the 12th–13th centuries, feats of engineering permitted increasingly gigantic buildings
The rib vault, flying buttress, and pointed (Gothic) arch were used as solutions to the problem of building a very tall structure while preserving as much natural light as possible. Stained-glass window panels rendered startling sun-dappled interior effects.
Techniques to optimize the pagerank algorithm usually fall in two categories. One is to try reducing the work per iteration, and the other is to try reducing the number of iterations. These goals are often at odds with one another. Skipping computation on vertices which have already converged has the potential to save iteration time. Skipping in-identical vertices, with the same in-links, helps reduce duplicate computations and thus could help reduce iteration time. Road networks often have chains which can be short-circuited before pagerank computation to improve performance. Final ranks of chain nodes can be easily calculated. This could reduce both the iteration time, and the number of iterations. If a graph has no dangling nodes, pagerank of each strongly connected component can be computed in topological order. This could help reduce the iteration time, no. of iterations, and also enable multi-iteration concurrency in pagerank computation. The combination of all of the above methods is the STICD algorithm. [sticd] For dynamic graphs, unchanged components whose ranks are unaffected can be skipped altogether.
Opendatabay - Open Data Marketplace.pptxOpendatabay
Opendatabay.com unlocks the power of data for everyone. Open Data Marketplace fosters a collaborative hub for data enthusiasts to explore, share, and contribute to a vast collection of datasets.
First ever open hub for data enthusiasts to collaborate and innovate. A platform to explore, share, and contribute to a vast collection of datasets. Through robust quality control and innovative technologies like blockchain verification, opendatabay ensures the authenticity and reliability of datasets, empowering users to make data-driven decisions with confidence. Leverage cutting-edge AI technologies to enhance the data exploration, analysis, and discovery experience.
From intelligent search and recommendations to automated data productisation and quotation, Opendatabay AI-driven features streamline the data workflow. Finding the data you need shouldn't be a complex. Opendatabay simplifies the data acquisition process with an intuitive interface and robust search tools. Effortlessly explore, discover, and access the data you need, allowing you to focus on extracting valuable insights. Opendatabay breaks new ground with a dedicated, AI-generated, synthetic datasets.
Leverage these privacy-preserving datasets for training and testing AI models without compromising sensitive information. Opendatabay prioritizes transparency by providing detailed metadata, provenance information, and usage guidelines for each dataset, ensuring users have a comprehensive understanding of the data they're working with. By leveraging a powerful combination of distributed ledger technology and rigorous third-party audits Opendatabay ensures the authenticity and reliability of every dataset. Security is at the core of Opendatabay. Marketplace implements stringent security measures, including encryption, access controls, and regular vulnerability assessments, to safeguard your data and protect your privacy.
Adjusting primitives for graph : SHORT REPORT / NOTESSubhajit Sahu
Graph algorithms, like PageRank Compressed Sparse Row (CSR) is an adjacency-list based graph representation that is
Multiply with different modes (map)
1. Performance of sequential execution based vs OpenMP based vector multiply.
2. Comparing various launch configs for CUDA based vector multiply.
Sum with different storage types (reduce)
1. Performance of vector element sum using float vs bfloat16 as the storage type.
Sum with different modes (reduce)
1. Performance of sequential execution based vs OpenMP based vector element sum.
2. Performance of memcpy vs in-place based CUDA based vector element sum.
3. Comparing various launch configs for CUDA based vector element sum (memcpy).
4. Comparing various launch configs for CUDA based vector element sum (in-place).
Sum with in-place strategies of CUDA mode (reduce)
1. Comparing various launch configs for CUDA based vector element sum (in-place).
StarCompliance is a leading firm specializing in the recovery of stolen cryptocurrency. Our comprehensive services are designed to assist individuals and organizations in navigating the complex process of fraud reporting, investigation, and fund recovery. We combine cutting-edge technology with expert legal support to provide a robust solution for victims of crypto theft.
Our Services Include:
Reporting to Tracking Authorities:
We immediately notify all relevant centralized exchanges (CEX), decentralized exchanges (DEX), and wallet providers about the stolen cryptocurrency. This ensures that the stolen assets are flagged as scam transactions, making it impossible for the thief to use them.
Assistance with Filing Police Reports:
We guide you through the process of filing a valid police report. Our support team provides detailed instructions on which police department to contact and helps you complete the necessary paperwork within the critical 72-hour window.
Launching the Refund Process:
Our team of experienced lawyers can initiate lawsuits on your behalf and represent you in various jurisdictions around the world. They work diligently to recover your stolen funds and ensure that justice is served.
At StarCompliance, we understand the urgency and stress involved in dealing with cryptocurrency theft. Our dedicated team works quickly and efficiently to provide you with the support and expertise needed to recover your assets. Trust us to be your partner in navigating the complexities of the crypto world and safeguarding your investments.
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Empowering the Data Analytics Ecosystem: A Laser Focus on Value
The data analytics ecosystem thrives when every component functions at its peak, unlocking the true potential of data. Here's a laser focus on key areas for an empowered ecosystem:
1. Democratize Access, Not Data:
Granular Access Controls: Provide users with self-service tools tailored to their specific needs, preventing data overload and misuse.
Data Catalogs: Implement robust data catalogs for easy discovery and understanding of available data sources.
2. Foster Collaboration with Clear Roles:
Data Mesh Architecture: Break down data silos by creating a distributed data ownership model with clear ownership and responsibilities.
Collaborative Workspaces: Utilize interactive platforms where data scientists, analysts, and domain experts can work seamlessly together.
3. Leverage Advanced Analytics Strategically:
AI-powered Automation: Automate repetitive tasks like data cleaning and feature engineering, freeing up data talent for higher-level analysis.
Right-Tool Selection: Strategically choose the most effective advanced analytics techniques (e.g., AI, ML) based on specific business problems.
4. Prioritize Data Quality with Automation:
Automated Data Validation: Implement automated data quality checks to identify and rectify errors at the source, minimizing downstream issues.
Data Lineage Tracking: Track the flow of data throughout the ecosystem, ensuring transparency and facilitating root cause analysis for errors.
5. Cultivate a Data-Driven Mindset:
Metrics-Driven Performance Management: Align KPIs and performance metrics with data-driven insights to ensure actionable decision making.
Data Storytelling Workshops: Equip stakeholders with the skills to translate complex data findings into compelling narratives that drive action.
Benefits of a Precise Ecosystem:
Sharpened Focus: Precise access and clear roles ensure everyone works with the most relevant data, maximizing efficiency.
Actionable Insights: Strategic analytics and automated quality checks lead to more reliable and actionable data insights.
Continuous Improvement: Data-driven performance management fosters a culture of learning and continuous improvement.
Sustainable Growth: Empowered by data, organizations can make informed decisions to drive sustainable growth and innovation.
By focusing on these precise actions, organizations can create an empowered data analytics ecosystem that delivers real value by driving data-driven decisions and maximizing the return on their data investment.
Chatty Kathy - UNC Bootcamp Final Project Presentation - Final Version - 5.23...John Andrews
SlideShare Description for "Chatty Kathy - UNC Bootcamp Final Project Presentation"
Title: Chatty Kathy: Enhancing Physical Activity Among Older Adults
Description:
Discover how Chatty Kathy, an innovative project developed at the UNC Bootcamp, aims to tackle the challenge of low physical activity among older adults. Our AI-driven solution uses peer interaction to boost and sustain exercise levels, significantly improving health outcomes. This presentation covers our problem statement, the rationale behind Chatty Kathy, synthetic data and persona creation, model performance metrics, a visual demonstration of the project, and potential future developments. Join us for an insightful Q&A session to explore the potential of this groundbreaking project.
Project Team: Jay Requarth, Jana Avery, John Andrews, Dr. Dick Davis II, Nee Buntoum, Nam Yeongjin & Mat Nicholas
Chatty Kathy - UNC Bootcamp Final Project Presentation - Final Version - 5.23...
WOOD USED IN ARCHITECTURE
1.
2. layer it …
carve it…
slot it together it …..
Bend it …..
you can ……
turn it …..
3. • Natural warmth - to the touch; wood insulates
• Workability, easily shaped with simple tools
• Infinite variety; no two trees, or even pieces from the
same tree, are alike
• strength-to-weight ratio for bridges, boats, homes,
furniture
• Flexibility; watch how huge trees bend before the wind
• Fire protection; wood chars and therefore burns slowly,
doesn’t melt or crumble
• Color: natural, through wood’s ability to receive many
types of stains and finishes
WOOD USED IN ARCHITECTURE
Natural wood has certain properties that make it an
attractive building material:
4. a. Softwoods come from the conifers (evergreens)
which have needles instead of leaves, e.g. pine
b. Hardwoods come from the broad-leaved or
deciduous trees. Most Philippine timber are of this
latter kind
CLASSIFICATION OF WOOD
Woods are generally classified into:
The terms “hardwood” and “softwood” are often
misleading because they have no direct relation to the
actual physical hardness or softness of the wood, so
that a hardwood may actually be softer than a
softwood.
5. • Sapwood: the outer portion that
conducts sap and has the living
cells.
• Heartwood : the inactive cells in the
inner portion.
– Mineral deposits may cause
darker color.
– Deposits make wood more
durable.
Tree roots, branches and bark have little to no commercial value
Heart wood
Sap wood
Bark
6. a. Sapwood
STRUCTURE OF WOOD
- is the softer, younger outer portion
of a tree that lies between the
cambium (formative layer just under
the bark) and the heartwood.
- It is more permeable, less durable
and usually lighter in color than the
heartwood.
7. b. Heartwood
1.02 STRUCTURE OF WOOD
- the older, harder central
portion of a tree.
- usually contains deposits
of various materials that
frequently give it a darker
color than sapwood.
- is denser, less permeable
and more durable than
the surrounding sapwood.
- The central core of the
log, it is composed of
inactive cells and serves
only as a mechanical
support
8. PROPERTIES OF WOOD
a. Hardness. This is measured by the compression
which a piece of timber undergoes when a weight
is applied to it.
b.Flexibility. The amount of piece will bend before
breaking . Softwoods are generally brittle while
most hardwoods are flexible.
c. Strength
d.Durability.
9. DEFECTS OF WOOD
a. Decay – Caused by the attack
of fungi.
b.Checks –Cracks or lengthwise
separation across the annual
rings of growth caused by
irregular shrinkage during
drying. Checks are formed
when the circumference
shrinks more than the interior
section of the log.
c. Shakes – These are cracks
between and parallel to the
annual rings of the growth.
Checks
Decay
10. DEFECTS OF WOOD
d.Knots – These are irregular
growths in the body of a tree
which interrupt the smooth
curve of the grain. The fibers of
the tree are turned from their
normal course and grow around
the knot at that point of the tree.
e. Pitchpockets – These are well-
defined openings between
annual rings containing solid or
liquid pitch.
f. Wane – This is the lack of wood
on the edge or corner of a
piece.
PITCHPOCKETS
KNOTS
11. DEFECTS OF WOOD
g. Warping - Any variation with
the plane surface of the piece
caused by unequal shrinkage
of the board. There are
several forms of warp:
Crook –a distortion of the board
in which the edge is convex or
concave longitudinal.
Bow –a distortion of the
board in which the face is
convex or concave
longitudinal.
Cup –a distortion of the board in
which the face is convex or
concave across the board.
Twist –a distortion of the board
in which one corner is raised.
12. Wood that is used in construction is called LUMBER.
CLASSIFICATION OF LUMBER
LUMBER
Lumber is classified by its size or dimensions measured
in inches, for example, a piece of lumber measuring 2
inches by 4 inches is called 2 x 4.
Generally, they are available in even-numbered widths:
4, 6, 8, 10,12 inches.
There are four available classifications of lumber:
a. Strips. Lumber less than 2” thick and less than 8”
wide.
b. Board Lumber. Pieces less than 2” thick and at
least 8” wide.
c. Dimension Lumber. Pieces more than 2” and less
than 5” in any dimension.
d. Timbers. Pieces 5” or more on the smallest
dimension
13. The process of removing moisture from green wood
(wood from freshly-cut logs) is called seasoning.
Seasoning may done by:
SEASONING OF LUMBER
LUMBER
a. AIR-DRYING in which the lumber is exposed to the air.
14. b.KILN-DRYING in which warm moist air or superheated
steam is used to heat the wood and drive out moisture.
The ideal condition in seasoning is for the moisture
from the interior of the wood to replace the surface
moisture which vaporizes. When the moisture from the
surface escapes faster than that which travels from the
interior to the surface, then there is equal drying in the
board and if the difference in moisture content is big,
shrinkage and then stress in the wood develops,
causing seasoning checks.
SEASONING OF LUMBER
LUMBER
15. Seasoned lumber has many advantages over green
lumber:
SEASONING OF LUMBER
LUMBER
a. It lessens the liability of the wood to be attacked by the
fungi causing blueing and decay, and by some wood-
boring insects.
b. Reduction of weight.
c. Increased strength.
d. Minimum shrinkage after the lumber is in place (thus
avoids opening up of joints in doors, windows, siding,
etc.).
e. Reduced checking and warping.
f. Increased nail-holding power of the wood (nails do not
hold well when driven into green or unseasoned lumber
because of its softness).
g. Improvement of the wood for the application of paint
and to receive wood preservatives, fire retardants.
16. PLYWOOD
WOOD COMPOSITES
Wood Composites are those products made from a
mixture of wood and other materials. Most wood
composites are produced in large sheets, usually
1220mm (4’) x 2440mm (8’).
Plywood is the most common
wood composite. It gets its
name from its construction: it is
made of several thin plies, or
veneers, of wood that have
been glued together. Each ply
or veneer is glued so that its
grain is at right angles to the
grain of the previous ply.
The outside plies are called the face and the back, and
the center plies are called the core. The cross-layering
make plywood very stable and strong.
17. PLYWOOD
WOOD COMPOSITES
Coatings or layers of
protective material over
the surface are good
only for interior purposes
because they are not
durable when exposed to
the weather.
18. PLYWOOD
WOOD COMPOSITES
a. Standard Sizes of Plywood:
Plywood is commonly available in:
3’ x 6’ (900mm x 1800mm) and
4’ x 8’ (1220mm x 2440mm)
Standard thicknesses are:
3/16” (4.5mm) for double wall partitions and ceilings
¼” (6.0mm) for double wall partitions
3/8” (10.0mm) for drawers and shelves
½” (12.0mm) for drawers and shelves
¾” (19.0mm) for drawers, shelves, cabinet and
closet doors
1” (25.0mm) for cabinet and closet doors, and sub-
floors
19. PLYWOOD
WOOD COMPOSITES
• the approximate equalization of strength properties
along its length and width;
• greater resistance to checking and splitting; and
• less change in dimension due to moisture content
• Ordinary Plywood
• Form Plywood
• Marine Plywood – waterproofed
• Fancy Plywood:
b. Advantages of Plywood:
c. Types of Plywood:
Narra bookmatched
Kalantas Rotary cut
Tanguile Ribbon-grained
Lauan Rotary cut
Dao bookmatched
Rosewood
Tanguile
20. HARDBOARD
WOOD COMPOSITES
This is a paneling material
made by reducing and
refining wood chips into
small, threadlike fibers, and
then pressing them under
heat in hydraulic pressure
into dense, smooth, and
very rigid panels.
In the production process the pulp is exploded under
pressure. Heat and steam is applies to leave a fine, fluffy
brown fibers. These fibers are transformed into mats,
which are held together with lignum and other glues. The
mats are than pressed between steam-heated metal
plates to give grainless sheets with one smooth, glossy
surface and one textured surface. To prevent warping,
moisture is added in a humidification chamber.
21. HARDBOARD
WOOD COMPOSITES
Hardboards are a cheaper option than plywood
where strength is not required.
Hardboard has a smooth surface on one side and a
screened surface on the other. It is sometimes
known as Masonite, after the man who invented it.
There are three types of hard board:
a. Standard hardboard
is light brown in color and has a fairly hard, smooth
surface on one side and a screened impression on
the other. It is flexible and easy to bend. It is suitable
for interior use only and where it is not subject to
moisture.
b. Panel hardboard
is somewhat denser than the Standard but not as
dense as Tempered.
22. HARDBOARD
WOOD COMPOSITES
c. Tempered hard board
is the densest type, made by impregnating standard
board with tempering compound of oils and resins and
baking it polymerize the tempering materials. It is dark
brown in color, brittle and stiff, with improved machining
qualities and greater resistance to moisture and water
penetration, making it ideal for exterior use
Hardboard is usually in panel size of 4’x8’ (1220mm x
2440mm) with thicknesses of 3mm 1/8” (), 3/16” (4.5mm)
or ¼” (6mm), and is obtainable either with a plain,
textured, or perforated surface.
Brand names of Hardboard:
LAWANIT standard and tempered boards
LAWANEX panel boards
MASONITE standard, panel and tempered hard board
23. CHIPBOARD
WOOD COMPOSITES
Chipboard is made by bonding together wood particles
with an adhesive under heat and pressure to form a
rigid board with a relatively smooth surface, often
faced with veneer. It is made by binding phenolic resin
or urea formaldehyde glue.
Chipboard is available in a number of densities;
normal, medium and high-density.
- Normal density is fairly soft and 'flaky‘
- High-density is very solid and hard (often used for
worktops and fire doors)
- Medium density is somewhere in between
24. FIBERBOARDS and MEDIUM DENSITY FIBERBOARDS
WOOD COMPOSITES
Fiberboards are finishing materials made from
vegetable fibers such as corn or sugarcane stalks
pressed into sheets. It is not very strong, but has
good insulating properties therefore it is usually used
for ceiling only.
It is generally 4’x8’ (1220mm x 2440mm) panel size, in
thicknesses of 3/16” (4.5mm) or ¼” (6mm), ½” (12mm)
and ¾ “ (19 mm).
Acoustic fiber board is manufactured from wood, straw,
bagasse pulp pressed into boards with or without holes or
slots. Thicknesses of acoustic fiber board vary from ½ “ to
2” (12 to 50mm) in ½” (12mm) increments.
Brand names of Fiberboard:
CELOTEX, CANEX, HOMASOTE, PHILTEX, BONOTEX
25. FIBERBOARDS and MEDIUM DENSITY FIBERBOARDS
WOOD COMPOSITES
MDF is a type of hardboard
which is made from wood
fibers glued under heat and
pressure. MDF has many
qualities that make it an ideal
alternative to plywood or
chipboard.
It is dense, flat, stiff, has no
knots and is easily machined.
Its fine particles provide a
material without a recognizable
"grain".
Unlike plywood, MDF contains no internal voids, and will
produce better edges providing that it is correctly
machined.
26. GYPSUM BOARDS
WOOD COMPOSITES
This is a non-combustible
building board with a gypsum
core enclosed in tough, smooth
paper. It is designed to be
used without addition of plaster
for walls, ceilings or partitions.
It is extensively used in “dry-
wall” construction, where
plaster is eliminated
Brand Names:
BORAL
ELEPHANT
Square Edge (S.E.)
for coverstrip jointing;
visible butt - jointed
panelling with clamp fixing
and free suspension.
Tapered Edge (T.E.)
for smooth seamless
jointing; jointless wall
and ceiling panelling
27. GYPSUM BOARDS
WOOD COMPOSITES
The types of Gypsum Board are:
a. Wall Board
This type is used for surface layer on interior walls and
ceilings. The regular wallboard comes with grey liner
paper backing and special paper finish on the facing
and edges suitable for decoration. The foil-backed
gypsum board has aluminum foil bonded to the liner
paper to serve as vapor barrier and thermal insulation.
Predecorated gypsum board comes with a decorative
vinyl or paper sheet on its face.
b. Backing Board
This is used as base layer in multi-ply construction,
where several layers of gypsum boards are desired for
high fire resistance, sound control and strength in walls.
28. GYPSUM BOARDS
WOOD COMPOSITES
c. Core Board
To save space, this type is used as a base in a multi-ply
construction of self-supporting (studless) gypsum walls.
It comes in 1” (25mm) thickness or 2- factory-laminated,
½ “ thick layers of backing board .
d. Type X Gypsum Board
For use in fire-rated assemblies, this may be wallboard,
backing board, or coreboard made more fire-resistant
by addition of glass-fiber or other reinforcing materials
e. Water-Resistant Backing Gypsum Board
This type comes with water-resistant gypsum core and
water-repellant face paper. It maybe used as base for
walls of bathrooms, showers, and other areas exposed
to wetting.
29. GYPSUM BOARDS
WOOD COMPOSITES
g. Gypsum Formboard
This type is used as a permanent form in the casting of
gypsum concrete roof decks.
f. Gypsum Sheathing
This type is used as fire protection and bracing of
exterior frame walls. It must be protected from the
weather by an exterior facing.
31. PARTICLE BOARD
WOOD COMPOSITES
Particleboard is made of small wood chips and base
materials including cotton stalk, rice straw, bagasse,
conventional wood chips and sawdust that have been
pressed and glued together.
32. Particle Board
Particle board is made by bonding wood chips and wood
waste, sawmill shavings, or even saw dust. Made with
larger pieces of wood than used to make MDF