Oak Beams Cambridge 2018-04-29T10:29:32+00:00

OAK BEAMS

Quercus robur

Millworks of Cambridge source structural Oak beams from the most respected European sawmills, ensuring a consistently stylish product, strength graded to BS:5756 and PEFC certified.

Millworks Oak beams can be used on any internal or external structures.

Construction grade timber beams are available from stock as freshly sawn (Green Oak) or air dried.

  • Grade: Strength to BS:5756
  • Grades: Q-PA, Q-P 1 & Q-P 2
  • Widths. 100x100mm up to 300x300mm
  • Length. Up to 6m
  • PEFC certified
  • Custom cut widths & lengths available
OAK CLADDING PROFILES

Tradition

Oak framing has been used since medieval times, overtime creating buildings of outstanding style.

Millworks supply Green Oak beams and Air dried beams for timber framing projects – from Oak porches, Oak car ports, restoration projects to Oak framed housing structures.

Appearance & Durability

Oak is golden brown in colour, with a limited amount of knots and has a straight grain. Oak can be used outside on structures without treatment as it is resistance to insects and fungus, overtime it will weather to a silver-grey. Thus making it beautiful and practical.

Strength Grading

Millworks stock structural Green and Air Dried Oak beams. Strength grades are in accordance with BS:5756 to THA D40, THB D30, TH1 D30 and TH2.

Cutting Service

Millworks have a fully functioning Mill, beams can be re-sawn and cross-cut to your exact cutting spec from Millworks extensive stock in Cambridge.

APPEARANCE GRADES

  • Q-PA

• Sawn timber with sharp arrises; in case of pieces longer than 3 m, wane less than 10% of the face width is permitted across no more than 25% of the length.

• Sound sapwood permitted on two arrises if the total width is less than 15% of the face width.

• Fully or partly intergrown sound knots are permitted if the diameter is less than one third of the face width.

• Dead knots, permitted where equivalent to two dead knots with a diameter less than 15 mm per linear metre.

• Boxed heart permitted, as well as slight traces of heartwood on two faces. Slope of the grain less than 7%, not exceeding 12% locally.

Excluded: unsound knots, end shake, frost crack, ring shake, star shake, curly grain, bark pocket, unsound sapwood, brown pith, brown streak, rot, holes.

  • Q-P 1

•Sawn timber with practically sharp arrises, permitting wane less than 10% of the face width across no more than 30% of the length. This width tolerance is increased to 15% for sections above 250 x 250 mm.

•Sound sapwood permitted on two arrises if the total width is less than 15% of the face width.

•Fully or partly intergrown sound knots are permitted if the diameter is less than half the face width.

•Two dead knots are permitted per linear metre if less than one quarter of the face width.

•Boxed heartpermitted, as well as traces of heartwood on both faces. Slope of the grain less than 12%, not exceeding 20% locally.

Permitted on a limited number of pieces: brown streak, black holes, brown pith. Excluded: unsound knots, frost crack, ring shake, star shake, curly grain, bark pocket, unsound sapwood, rot, white holes.

  • Q-P 2

•Timber with wane less than 15% of the face width across no more than 30% of the length.

•Dead knots permitted if less than one third of the face.

•One unsound knot is permitted per linear metre if less than 15% of the piece width.

Permitted without any restrictions: sound sapwood, fully or partly intergrown sound knots, sloping grain, brown pith, brown streak, black holes, exposed pith. Permitted on a limited number of pieces: superficial bark pocket, unsound sapwood.

Excluded: frost crack, ring shake (unless it cannot be seen on the faces), rot, white holes.

Fire Retardant for Timber

When specified, DRICON or NON-COM Exterior fire retardant can be applied to OAK beams, to comply with Building Regulations. This is applied under controlled conditions in a vacuum pressure timber impregnation plant. The treatment complies with ISO accreditation and is accepted by the National House Building Council (NHBC) Building Control for exterior cladding.

Alternatively, HR-Prof can be applied on site, a fire retardant that complies with Euroclass B or C for spread of flame.

Weathering or Finishing

Externally, in the correct conditions, Oak will weather to a silver-grey, if left untreated.
Although naturally durable, Oak can be finished for protection against the elements. This will keep it looking consistent on all elevations of your project. Millworks can advise on different options for protecting your timber.

OSMO UV-Protection will prevent Oak beams from weathering. Or, OrganoWood can be applied to accelerate the weathering process, resulting in a consistent silver-grey on all elevations.

Internally, OSMO Polyx Oils can be used to bring out the natural beauty of Oak beams.

Fixings

Stainless-steel cladding fixings should be used because natural oils in the timber have a corrosive effect on ferrous metals.

OAK CLADDING PROFILES

OAK BEAM SECTIONS

 DIMENSION (mm)LENGTH INTERVAL (M)LENGTHS, UP TO (M)
100 x 10016
150 x 15016
200 x 20016
200 x 15016
250 x 20016
300 x 30016
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