We use oak beams with a natural curve to make curved oak components, for traditional oak framing. Curved oak sections are stronger than curved pieces cut from straight trunks. Curves are usually supplied green, and can be cut bespoke.
Species
Quercus robur
Moisture content
Wet (green) / semi-seasoned
Surface finish
Sawn
Shaped sections available
Sawn shaped curves, through and through curved slabs
Oak Curves Beams
Oak Curves Beams
Oak Curves Beams
Oak Curves Beams
Oak Curves Beams
Species
Quercus robur
Moisture content
Wet (green) / semi-seasoned
Surface finish
Sawn shaped curves
Shaped sections available
Sawn shaped curves
Through and through curved slabs
Durability
BS EN 350 Durable (Heartwood only)
Weight
Approximately 1000KG / M3 when wet and 700KG / M3 when dry.
Shrinkage
Less than 0.5% along the length and between 5% and 7% across the section
Modulus of elasticity
Green oak E = 8,000 N/mm2
Dry oak E = 10,000 N/mm2
Green oak is generally easy to work but becomes increasingly difficult as it dries.
Oak contains tannic acid which will corrode ferrous metals. When the two come into contact, a blue sludge is formed which will stain the oak and anything else it comes into contact with.
The ambrosia beetle can attack the wet timber (30% moisture +). However, the beetle will die as soon as the wood dries to less than 30%. Re-infestation will not occur. Other dry wood will not be affected. Sapwood is commonly attacked by the powder post beetle (Lyctus spp). However, sap is normally excluded from oak beams.
All fixings used in conjunction with green oak should be stainless steel.
Surface spread of flame class 3 (BS 476-7)
Trada Technology. www.trada.co.uk
Vastern Timber is not able to offer structural engineering services or advice on section sizes required for particular applications
While the utmost care has been taken to provide accurate information, Vastern Timber shall not be held responsible for any consequences arising from any errors or omissions on this website nor for any damages resulting from the use of the information.