Roof Timber Sizes Uk

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.

Roof timber sizes uk. Surveyors span tables for designing roof rafters. 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. 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.

High quality timber supplies for virtually any construction project. Structural calculations for timber joists timber beams glulam beams flitch beams using the latest design codes. C16 timber is kiln dried timber certified to comply with the criteria of strength grade c16. Imposed loads roof snow load and short term point load altitude not exceeding 100m.

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. Most independent timber merchants in the uk will offer a range of both sawn and planed timber. It s often chosen as the standard timber for roof extensions or joist refurbishment as it s the most cost effective internal structural timber. Care needs to be taken in understanding the sizes stated some are stated in sawn sizes and others in finished ie planed.

Suitable for uk building regulation approval. Pitched roof timber sizes. 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. 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.

For pitched roofs flat roofs and ceiling joists. Order now for mega savings and fast uk delivery on timber supplies. All the figures are based on roofing tiles or slates laid on timber laths over sarking felt. C16 timber is commonly used in floor and roof joists for internal building work.