Wood KU ARCH626 BTECH 1

Hardwoods

Broadleaf, Deciduous, Walnut (take longer to grow)

Softwoods

Coniferous, Evergreen, Pine (grow fast)

4 Areas of a Tree

Trunk, Root Plate, Critical Root Zone, Total Root Zone

Dripline

Area under the canopy of a tree, avoid disturbing soil within this area

Annual Growth Rings

Become the grain of wood, show age of wood

Sapwood

the living part of the tree on exterior which still has sap

Heartwood

inner of tree, denser wood, no sap, oldest part of the tree

FSC

Forest Stewardship Council. Promulgates sustainable forestry standards

Wood stores ______

CO2

Steps to Seasoning Lumber

Green Lumber, Milled Lumber, Rough Sawn Lumber, Moisture Content, Drying (seasoning), Surfacing

Pressure Treated Lumber

Allows wood to withstand weather, animals, bugs, and rot by forcing chemicals into the wood

Common Wood

Lower quality, has knots and imperfections, can warp

Premium Wood

Higher quality, less imperfections

Example of Modified Wood

Acetylated Wood

Acetylated Wood

Basically add vinegar/acid to wood, it changes molecularly, becomes water/rot resistant

Mortise and Tenon

Older style of wood joining

Balloon Framing

Studs are continuous all the way to the roof

Platform Framing

The floor plates create separation in the studs vertically, 1st floor --> studs --> 2nd floor --> studs

5 Construction Types

Type I, Type II, Type III, Type IV, Type V

Type I Construction Type

Fire-Resistive Construction. non-combustible structure and partitions.

(ex) Skyscrapers:

Tall office or residential buildings that are designed to withstand fires for extended periods. They typically have reinforced concrete or steel frames, concrete or masonry walls, and fire-resistant materials throughout.

Type II Construction Type

Non-Combustible Construction: Fire restrictive, non combustible structure, with one hour fire rated partitions

(ex) Warehouse:

A large, industrial building used for storage, manufacturing, or distribution. These structures often have steel frames, metal roof and wall panels, and minimal wood components.

Type III Construction Type

Ordinary Construction: Fire resistive exterior walls

(ex) Apartment Buildings:

Multi-story apartment buildings are constructed with wooden structural elements, such as wood framing and wooden floors, but with fire-resistant materials and construction techniques applied to increase fire safety.

Type IV Construction Type

Heavy timber: slow burning

(ex) Barn:

Traditional barns constructed primarily with large wooden timbers and posts. Heavy timber construction relies on the thickness and density of the wood for fire resistance.

Type V Construction Type

Wood-Framed Construction: Platform framing

(ex) Single-Family Homes:

Most residential houses are built using wood framing, making them an example of Type V construction. While these homes have wooden structural elements, modern building codes often require fire-resistant materials in key areas like walls and roofs for improved safety.