Timber Type

Ultimate Compressive Strength (10 exp 6 N/m2)

Ultimate Shear Strength (10 exp 6 N/m2)

Comparative Hardness (Newtons)

Durability (years)

Specific Gravity

Impregnation Properties

Dalbergia

n.a.

n.a.

n.a.

n.a.

1.28

n.a.

Spirostachys

55

15

9000

10

1.04

n.a.

Afrormosia

70

15

9600

10

0.96

ER

Khaya Nyasica

45

8

3800

2-5

0.58

ER

Acacia Nigrescens

70

17

19000

10

1.12

ER

Olea Africana

n.a.

n.a.

n.a.

10

1.15

n.a.

Podocarpus

40

11

2500

1

0.51

Permeable

Chlorophora Excelsa

53

13

5600

5-10

0.60

ER