A 30×40 cm or 300×400 mm oak beam is sourced from a majestic oak tree that takes approximately 150 years to grow. These beams, available in our selection, have been air dried for approximately 5 to 7 years. The (European) oak beams display a stunning, straight grain, making it an excellent choice for structural beams in both renovation projects and new home construction.
What section size is appropriate for my Project?
Typically, a rule of thumb suggests adding 5 cm to the cross-sectional height for every meter of span. Following this guideline, an oak beam measuring 30×40 cm would provide ample strength for an 8-meter span. Always consult an engineer for precise dimension calculations.
An rectangular oak beam offers added robustness, as a 30×40 cm beam has less volume compared to a 40×40 cm one. This extra weight contributes to a downward force, with a horizontal support beam’s strength primarily influenced by its vertical height. Additionally, an asymmetric cross-section ensures a less imposing appearance in an interior.
What is the weight of such oak beams?
The weight of an oak beam varies after several years of the drying process, typically ranging between 750 and 850 kg per cubic meter. Initially influenced by moisture content, the volumetric mass of oak wood decreases as the beam dries. A dry oak beam consistently weighs less than a freshly sawn one, which can exceed 1000 kg per cubic meter.
Furthermore, the beam’s density is influenced by the growth area; a beam with fine grains may be heavier than one cut from a faster-growing tree.
Weight indications include:
> 30×30 cm / approx. 70 kg per linear meter (m1)
> 30×35 cm / approx. 80 kg per linear meter (m1)
> 30×40 cm / approx. 95 kg per linear meter (m1)
How much does a 30×40 cm oak beam cost?
The pricing of a 30×40 cm oak beam is influenced by the duration of wood drying. The longer the drying period, the higher the quality, and subsequently, the pricing level. These larger dimensions result in a higher cost compared to smaller oak beams, such as those measuring 15×15 cm or 20×20 cm. This is due to the scarcity of thick, straight oak trunks, which represent a superior quality. Therefore, the price reflects both the size and quality of the available wood.
Apart from the 30×40 cm (300×400 mm) oak beams, we provide a selection of other substantial dimensions, such as oak beams measuring 30×30 cm and 30×35 cm. Generally, these beams are offered in lengths ranging from 6 meters to 9 meters.