GJ Bog Mats use high quality, hard wearing, durable Oak and Beech for their European hardwood bog mats. They can tolerate repeated use and provide the ideal protective material for temporary roadways causing minimal disturbance to the ground.
European Oak otherwise known as Quercus petrea, Quercus robur or European White Oak is one of Europe’s dominant broad leaf species. They grow to a lofty 20-30 metres high and achieve a diameter of 40-80 centimetres. The timber is straight grained, hard, heavy and robust.
Physical characteristics
| Density (at 12 % moisture content) | 702 kg⁄m3 |
| Total longitudinal shrinkage | 0.4 % |
| Total radial shrinkage | 4.3 % |
| Total tangential shrinkage | 8.9 % |
Equilibrium moisture content
| (20° C⁄ 37 % rel. humidity) | 8.9 % |
| (20° C⁄ 83 % rel. humidity) | 17.2 % |
Mechanical characteristics
| Modulus of elasticity under bending | 13000 N⁄mm2 |
| Modulus of rupture under bending | 88 N⁄mm2 |
| Tension strength | 90 N⁄mm2 |
| Compression strength 61 | N⁄mm2 |
| Brinell hardness perpendicular to the fibres | 34 N⁄mm2 |
| Janka Hardness | 4.5 kN |
| Nail withdrawal strength in N per mm depth and mm diameter | 17 N⁄mm2 |
European Beech otherwise known as Fagus sylvatica, grows in the west at altitudes of up to 1500 metres. They reach a height of 35 metres and achieve diameters between 40 and 90 centimetres. The timber is finely textured, heavy and exceedingly strong.
Physical characteristics
| Density (at 12 % moisture content) | 712 kg⁄m3 |
| Total longitudinal shrinkage | 0.3 % |
| Total radial shrinkage | 5.8 % |
| Total tangential shrinkage | 11.8 % |
Equilibrium moisture content
| (20° C⁄ 37 % rel. humidity) | 7.3 % |
| (20° C⁄ 83 % rel. humidity) | 15.7 % |
Mechanical characteristics
| Modulus of elasticity under bending | 16000 N⁄mm2 |
| Modulus of rupture under bending | 123 N⁄mm2 |
| Tension strength | 135 N⁄mm2 |
| Compression strength | 62 N⁄mm2 |
| Brinell hardness perpendicular to the fibres | 34 N⁄mm2 |
| Janka Hardness | 6.7 kN |
| Nail withdrawal strength in N per mm depth and mm diameter | 18 N⁄mm2 |
GJ Bog Mats will discuss your project requirements and happily advise you, supply and deliver certified or non certified European hard wood mats and can include a professional laying down service. Phone now on 07896 265 981 or 0800 774 7751. Tropical hardwood mats are available for hire or for sale too.