timber frame 2

8/11/2019 Timber Frame 2

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TIMBER FRAME/WALL


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1.1 INTRODUCTION

- The construction of a timber structure is a clean

and dry operation

- The timber can be cut and assembled with

simple hand tools

- It has adequate stability and strength to support

the loads

- Environmental performancesustainable,

renewable, natural

TIMBER FRAME/WALL


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MODERN TIMBER

CONSTRUCTION

Timber is used as a major structural material in a great variety

of building and civil engineering applications.

Lightweight timber frame systems (based on structural timber,engineered wood products and panels)

single family; houses, multi-storey residential buildings.

Large-scale timber systems may be used for industrial and

commercial buildings.


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The anatomy of a typical timber frame small house


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General advantages

An environmentally friendly, easily recyclable

material.

Timber has a low weight in relation to

strength, which is advantageous for transport,

erection and production.

Low inertia forces.

Wood has aesthetic qualities.


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THE TIMBER FRAME

BUILDING CONCEPT

Built up by a skeleton of timber joists and

studs, covered with panels fastened to the

wood elements.

Plywood; fiber-board or chipboard, with

structural quality.

Gypsum panels = fire resistances protection.


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THE TIMBER FRAME

BUILDING CONCEPT (CONTD)

Utilised for:

transfer of vertical loads,

stabilization of wind and earthquake loads, physical separation,

fire separation,

sound insulation, and thermal insulation.


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THE TIMBER FRAME


The factors governing the design of walls are,

in order of priority:

fire resistance,

horizontal stabilisation,

sound insulation, and

vertical loading.


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THE TIMBER FRAME


Design of floors, the most importantfactors are:

impact sound insulation,

vibration control, simplicity in production, and

possibility for the installation of services.


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1.2 ADVANTAGES OF TIMBER FRAME/WALL

a. Strength & Stability

- Strength varies according to density of timber

and defects in timber such as knots, shakes,

wane and slope of the grain- Stability depends on a stable foundation onwhich a stable structure can be constructed

b. Lightweight Construction

- Timber construction is lighter than masonryconstruction

- Foundation can be designed to be smaller andless wasteful of material

TIMBER FRAME/WALL


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1.2 ADVANTAGES OF TIMBER FRAME/WALL (contd)

c. Fast Construction

- Off-site prefabrication allows erection ofbuilding faster

- The dry construction is fast and there is noneed to wait for wet trades to dry out

d. Environmental Performance

- Timber is a natural and renewable material

e. Durability

- Very durable to any weather condition

- Maintaining process can prolong the structureexceeding 100 years

TIMBER FRAME/WALL


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TIMBER FRAME/WALL1.1 ADVANTAGES OF TIMBER FRAME/WALL (contd)


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TIMBER FRAME/WALL1.3 DISADVANTAGES OF TIMBER FRAME/WALL

a. Low Fire Resistance

- Timber is a combustible material

- Fire Stop must be considered in design

b. High Cost

- Cost for high quality timber is very expensive

since the supply for good timber is very limited

c. Less Design Flexibility

- Design is limited and not flexible


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TIMBER FRAME/WALL1.4 TYPES OF TIMBER FRAME/WALL

1.4.1 Platform Frame

1.4.2 Balloon Frame


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TIMBER FRAME/WALL1.4 TYPES OF TIMBER FRAME/WALL

1.4.1 Platform Frame

- A load bearing wall system

- Employs prefabrication of frames

- Studs extend only from the top of one level

to the bottom of the next

- No firestops allocated in the design

- The completed floor can then be used a

working platform

- Only until six storey height

- Roof structure can only be assembled at the

final stage of construction, thus exposing works

to rain


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TIMBER FRAME/WALL1.4 TYPES OF TIMBER FRAME/WALL (contd)

a. Platform Frame (contd)


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a. Platform Frame (contd)


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1.4.2 Balloon Frame (contd)

- A load bearing wall system

- Employs prefabrication of frames

- Studs extend from the foundation to the

roof

- Firestops are required to close the cavities in

the wall against passage of fire

- Greater speed of fabrication and erection

- Only suited for use in two storey building

- Roof structure can be assembled right after

the studs are established


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b. Balloon Frame (contd)


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TIMBER FRAME/WALL1.5 DIFFERENCES BETWEEN PLATFORM & BALLOON

FRAME


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FRAME (contd)

BALLOON FRAMEPLATFORM FRAME


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FRAME (contd)


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TIMBER FRAME/WALL1.6 METHOD OF CONSTRUCTION

EXERCISE 1:

IN YOUR OWN WORDS SUMMARIZE THE METHOD OF

CONSTRUCTION OF THE FOLLOWING:

A) TIMBER PLATFORM FRAME

B) TIMBER BALLOON FRAME


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TIMBER FRAME/WALL

-THE END-

timber frame 2

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