Worksheet – 24360 (v2) Demonstrate knowledge of timber and other construction materials used in BCATS projects

Student name:

Explain the following terms:

a) Indigenous

b) Exotic:

c) Imported:

Using the list provided below. identify a timber that matches with each of the following terms:

Radiata pine	Rimu	Tawa	Fijian kauri
NZ kauri	Totara	Douglas fir	Kwila

a)	Indigenous:

b)	Exotic:

c)	Imported:

d)	Hardwood:

e)	Softwood:

Identify the parts of the log.

A B

C

E

D

A
B
C
D
E

Two samples of freshly cut timber are shown below.

In the space provided, sketch the effects of shrinkage on each of the samples.

Sample A Plain, flat or tangential sawn

Sample B Quarter or radial sawn

A

Of the two samples provided above which will provide:

The greatest stability?
The strongest beam?
The hardest wearing surface?

A large knot is running through the face of a board. Identify the effects that the knot will have on the working and structural qualities of the timber.

Identify the following defects

What are the signs that timber is affected by:

a) Borer

b) Wet rot

Give 4 reasons why timber can deteriorate and describe the effect each will have?

Reason	Effect

What is the difference between rough sawn and dressed timber?

What is the difference between air seasoning and kiln seasoning timber?

Complete the following table.

Type of timber treatment	How is it applied to the timber?	When is the treated timber used?
Boron salts
Copper-chrome-arsenate (CCA)
Light organic solvent-borne preservative (LOSP)

Answer the following questions about safe working and handling procedures for timber.

a). List 3 requirements when stacking timber.

1. 2. 3.

b). List 3 precautions to be taken when handling treated timber.

1. 2. 3.

c). Why should treated timber not be used for food containers or burnt in fire places?

Why should fillets be placed between the boards when seasoning?

Describe the consequences of storing timber in direct contact with the ground.

Choose 3 construction materials from different categories shown below, and complete the following tables:

metals	glass	composite materials
plastics	manufactured boards	concrete

Material 1 name:
What is it made of?
What are its basic structural properties?
What can it be used for?
What are 2 tips for handling/working with it safely?
Describe any special handling requirements.
How should it be stored?

Material 2 name:
What is it made of?
What are its basic structural properties?
What can it be used for?
What are 2 tips for handling/working with it safely?
Describe any special handling requirements?
How should it be stored?

Material 3 name:
What is it made of?
What are its basic structural properties?
What can it be used for?
What are 2 tips for handling/working with it safely?
Describe any special handling requirements?
How should it be stored?

Assessor Sign off:

Assessor name: Assessor signature: Date:	RESULT: A = Achieved, N = Not Yet Achieved