Hardwood Beam Sizes

Suggested Sizes: 

The table below shows common lumber sizes used in British construction along with suggested lengths that are often use for lintels, beams and posts. Durable posts in oak, alder and sweet chestnut are likely to be sought for timber traffic signs etc. This is a guide only and any size can have an appropriate use.

          Beam Dimensions                            Hardwood Beam Sizes – Length (m)

Depth (mm)

  Width (mm)

 1.5

 2.0

2.5

3.0

4.0

5.0

6.0

6.5

7.0

100

100 

X

X

X






120

100 

X

X

X






120

120 

X

X

X






150

100 

 X








150

150 

X

X

X






150

215 

X








150

300

X

X

X







215

100 


X

X

X

X




215

215 


X

X

X

X

X




215

300 


X

X

X

X

X




250

100 



X

X

X

X




250

215 



X

X

X

X




250

250 


X

 X

X

X

X

X



250

300 



 X

X

X

X

X



300 

215




X

X

X

X



300 

250 




X

X

X

X

X

X

300

300 



X


X

X

X

X

X