Properties of Hardwoods

The table below explains various types of wood species characteristics, helping you choose the right one for your project.

 

The best species for a project will depend on how and where the timber will be used, as the properties of hardwoods are not all the same. There are various timbers suitable for structural use, especially for internal use in dry centrally heated buildings.

 

 Characteristics of Hardwood Species  
 

Dens-ity

MOR

E

Charr-ing rate

Properties

Workab-ility

Moisture movement

Sizes (mm)

Chemical

Colour

kg/ m3

N/ mm²

kN/ mm²

mm per 30 min

British Ash (Fraxinus excelsior)

710

116

11.9

15

Resistant to split

Drill nail holes

Internal only. Difficult to treat

Med movement in varying humidity

250

Not significant

Pale

British Beech (Fagus sylvatica)

720

118

12.6

15

Drill nail and screw holes

Internal only - easy to treat

Large

250

ferrous stains when wet

  

English Oak (Quercus robur, Quercus petraea)

720

97

10.1

15

Drill nail and screw holes

Heart-wood durable

Large when green med in varying humidity

250

highly acid- fixings to be protected or non-ferrous

Light yellow brown sapwood  Darker heartwood

British Sweet Chestnut (Castanaea sativa)

560

79

8.2

20

Poor impact resistance

Splits Drill nail and screw holes to prevent splitting

Heart- wood durable, sapwood difficult to preserve

Small movement

250

highly acid- fixings to be protected or non-ferrous

Light yellow brown sapwood  Darker heartwood

British Sycamore (Acer pseudo-platanus)

630

99

9.4

20

Medium resistance to impact

Drill nail and screw holes to prevent splitting

Internal only - easy to treat

Med. movement in varying humidity

250

Not significant

No difference  in colour between heart and sap

From British Grown Hardwoods by TRADA Technology Ltd.

If you would like any further information on the characteristics of hardwood species, please feel free to contact us.

 

 

Page Topics : characteristics of hardwood species, lime timber