Timber Sizes For Pitched Roof

It will be all be warm roof insulation above and between with the ceiling plasterboard nailed under the rafters so no ties.

Timber sizes for pitched roof.

It s often chosen as the standard timber for roof extensions or joist refurbishment as it s the most cost effective internal structural timber. My builder would also be delighted to over specify the timber. C16 timber is commonly used in floor and roof joists for internal building work. Roof pitch between 15 and 22 5 degrees with rafter spacing strength class c16.

Roof pitch between 15 and 22 5 degrees with rafter spacing. To meet the requirements of the c16 timber grade timber is machine graded or visually graded. The building control officer won t specify the timber sizes but seems to be easy going and would be happy to accept generous sizes with c24 timber. Step 2 the conservatory roof is carefully removed leaving only the windows doors and and brickwork in place.

For pitched roofs flat roofs and ceiling joists. 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. Maximum clear span of rafters in metres for roof pitches of between 15 and 45 degrees. 9 5mm plasterboard should be fixed at a maximum support spacing of 450mm.

Ceiling finishes should be fixed according to the spacing of the support members and the thickness of the sheet. A new timber ring beam is fitted alongside the existing windows to support the new roof structure. The pitch of the toof is significantly increased to provide additional strength and durability as well as providing a better internal space. Surveyors span tables for designing roof rafters.

Maximum clear span of rafters in metres for roof pitches of between 15 and 45 degrees size of rafters in mm roof pitch between 15 and 22 5 degrees with rafter spacing of roof pitch between 22 5 and. Plasterboard should be fixed as follows. 12 5 15mm plasterboard should be fixed at a maximum support spacing of 600mm.