Roof Timber Sizes Uk

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Roof timber sizes uk.

It s often chosen as the standard timber for roof extensions or joist refurbishment as it s the most cost effective internal structural timber. Surveyors and structural engineers utilise data from tables below to help calculate the correct size strength and centres of roof timbers for the required spans and loadings. Compliment our range we stock batten firrings arris rail and a range of treated timbers in various sizes and can quickly source and supply any of your timber requirements. Structural calculations for timber joists timber beams glulam beams flitch beams using the latest design codes.

Suitable for uk building regulation approval. Care needs to be taken in understanding the sizes stated some are stated in sawn sizes and others in finished ie planed. Pitched roof timber sizes. Should refer to trada document span tables for solid timber members in floors ceilings and roofs excluding trussed rafter roofs for dwellings or ask your lbc surveyor for advice.

1 2 timber strength class and joist size automatically calculate sizes suitable for supporting the loads below c16 cost effective for most applications c24 stronger more demanding c14 c18 c22 c27 c30 c35 c40. Imposed loads roof snow load and short term point load altitude not exceeding 100m. Including osb plywood and chipboard for flooring roofing and other structural applications. The following tables give details of the allowable spans and spacing for some of the more common timber sizes used in traditional roofing construction.

Most independent timber merchants in the uk will offer a range of both sawn and planed timber. Imposed loads of 1 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude. C16 timber is commonly used in floor and roof joists for internal building work. C16 timber is kiln dried timber certified to comply with the criteria of strength grade c16.

High quality timber supplies for virtually any construction project. Imposed loads of 0 75 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude does not exceed 100 metres refer to bs 6399 3. Surveyors span tables for designing roof rafters. For pitched roofs flat roofs and ceiling joists.