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 Wood you can ….....
Layer it
Carve it

Bend it

Slot it together
Turn it
PARTS OF WOOD
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.
Heart wood
Tree roots, branches and bark
have little to no commercial value
WOOD USED IN ARCHITECTURE
Natural wood is an attractive building material for
several reasons:
•Aesthetic Appeal: Wood has a natural beauty with
varied grain patterns and warm colors.
•Tensile Strength: Despite being lightweight, wood
has excellent tensile strength, often outperforming steel
in self-support length.
•Insulation: Wood is a natural insulator against heat
and sound, contributing to energy efficiency and
acoustic comfort.
•Workability: It can be easily cut, shaped, and joined
for various construction needs.
•Sustainability: Wood is a renewable resource and can
be sustainably sourced.
•Workability : easily shaped with simple tools
Classification of wood:
Soft wood
• Softwood, derived from coniferous trees like pine,
cedar, and spruce, is known for its distinct properties:
Lightweight, Workability, Versatility
Hard wood
• Hardwood is known for its strength and durability,
making it a preferred choice for various applications:
Density, Longevity, Maintenance, Aesthetics
• Hardwoods are valued for their quality and are used in
high-end construction and design projects. e.g. oak
e.t.c
• Hard wood and soft wood are often misleading
because becuase they have no direct relation to actual
hardness and softness of wood so that a hardwood
may actually be softer than soft wood
NATURAL
WOOD SEASONING
Reduces moisture content of wood
There are two main reasons:
i. Woodworking: when wood is used as a
construction material, whether as a structural
support in a building or in wood working
objects, it will absorb or desorb moisture
until it is in equilibrium with its surroundings.
Equilibration (usually drying) causes unequal
shrinkage in the wood, and can cause
damage to the wood if equilibration occurs
too rapidly. The equilibration must be
controlled to prevent damage to the wood. ii.
Wood burning: when wood is burned, it is
usually best to dry it first.
DEFECTS OF WOOD
Here are some common defects:
• Knots: These are remnants of
branches that were not fully
integrated into the tree’s growth.
• Splits: Cracks in the wood, which
can occur due to drying or stress.
• Stains: Discoloration caused by fungi
or chemicals.
• Wormholes: Small holes created by
insects, particularly termites.
• Decay: The decomposition of wood
due to fungi, often resulting in a
softer texture
WOOD COMPOSITE
Composite:Composite wood is an engineered
material made from a mixture of wood fibers,
plastics, and adhesives. It’s designed to mimic the
appearance and texture of natural wood while
offering additional properties such as durability and
sustainability
PLYWOOD:
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
PLYWOOD
Advantages of Plywood:
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
Types of Plywood:
Ordinary Plywood
Form Plywood
Marine Plywood - waterproofed
Fancy Plywood:
Narra bookmatched
Kalantas Rotary cut
Tanguile Ribbon-grained
Lauan Rotary cut
Dao bookmatched
Rosewood
Tanguile
WOOD COMPOSITES
PLYWOOD Standard Sizes of
Plywood: Plywood is commonly
available in: 3' * 6' (900mm *
1800mm) and 4' * 8' (1220mm x
2440mm)
Standard thicknesses are:
3 /16^ prime prime (4.5mm) for
double wall partitions and ceilings 1/4
^ prime prime (6.0mm) for double wall
partitions 3 /8^ prime prime (10.0mm)
for drawers and shelves 1/2 ^ prime
prime (12.0mm) for drawers and
shelves 3/4 ^ prime prime (19.0mm)
for drawers, shelves, cabinet and closet
doors 1" (25.0mm) for cabinet and
closet doors, and sub- floors
LUMBER
CLASSIFICATION OF LUMBER
Wood that is used in construction is called 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
Air drying process is used for seasoning of lumber
HARDBOARD
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.
b. Panel hardboard
is somewhat denser than the Standard but not as dense as
Tempered.
Tempered hardboard, also known as high-density
fiberboard (HDF), is an engineered wood board. Unlike
particleboard, which is made from wood chips, tempered
hardboard is created using ground-up wood fibers.
 CHIPBOARD
• 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

FIBERBOARD
Fiberboard is an engineered wood product made from wood fibers.
Here are some key points about it:
• Types of Fiberboard:
• Particle Board (LDF): Low-density fiberboard, often referred
to as particle board, is the least dense type.
• Medium-Density Fiberboard (MDF): MDF has a moderate
density and is commonly used in the furniture industry. It can
be veneered to resemble conventional wood.
• Hardboard (HDF): High-density fiberboard is the densest
type. It is durable and finds applications in various fields.
• Manufacturing Process:
1.Wood Chipping 2.Cleaning 3.Defibration 4. Adhesive
Application
5.Mat Formation 6.Hot Pressing 7.Finishing
• Applications:
• Furniture Industry
• Packaging . Construction
gypsum board, also known
as drywall or plasterboard. Here’s a concise overview:
• Composition:
• Gypsum board is made from gypsum, a soft mineral
composed of calcium sulfate dihydrate.
• The manufacturing process involves grinding gypsum rock
into a fine powder and mixing it with water to form a paste.
• This paste is then sandwiched between two layers of paper
or fiberglass matting.
• Types of Gypsum Board:
• Regular Gypsum Board: Offers natural fire
resistance due to the gypsum core.
• Type X Gypsum Board: Provides enhanced fire
resistance and is commonly used in fire-rated assemblies.
• Applications:
1 Interior Walls and Ceilings 2 Soundproofing 3 Fire-
Rated Assemblies 4 Finishing
Wood structures

World's Largest Wooden industrial buildings in wood -

Structure Built in Spain Construction Canada

Fogo Island Inn, Fogo Island, Canada House K, Stockholm, Sweden