Roof Timber Sizes Uk

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.

Roof timber sizes uk.

Maximum clear span of flat roof joists in metres for sc3 timber spacing between joists size of roof joist 400mm 450mm 600mm 47 x 97 1 84 1 81 1 74. Uk roofing and plastic supplies carefully select our partners to ensure that we only supply the highest quality timbers. Imposed loads roof snow load and short term point load altitude not exceeding 100m. 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.

C16 timber is commonly used in floor and roof joists for internal building work. 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. It s often chosen as the standard timber for roof extensions or joist refurbishment as it s the most cost effective internal structural timber. All the figures are based on roofing tiles or slates laid on timber laths over sarking felt.

Suitable for uk building regulation approval. Order now for mega savings and fast uk delivery on timber supplies. 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.

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. Pitched roof timber sizes. High quality timber supplies for virtually any construction project. Most independent timber merchants in the uk will offer a range of both sawn and planed timber.

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. The following tables give details of the allowable spans and spacing for some of the more common timber sizes used in traditional roofing construction. For pitched roofs flat roofs and ceiling joists. C16 timber is kiln dried timber certified to comply with the criteria of strength grade c16.