Single Joist Timber Floor Section

Basement ground floor of timber 1 auditorium dances and dramas.

Single joist timber floor section. T imber flooring basement or ground floor of timber. Code of practice for permissible stress design materials and workmanship and bs 5268 7 1 1990 structural use of timber section 7 1 domestic floor joists. Double joist timber beam. In traditional timber framing there may be a single set of joists which carry both a floor and ceiling called a single floor single joist floor single framed floor or two sets of joists one carrying the floor and another carrying the ceiling called a double floor double framed floor.

The result is that you can use smaller sized stock be it conventional lumber or i joists for multiple span continuous joists than with simple single span joists. All of these are known as the dead load. The floor consists of wooden joists also called bridging joists spaced 30 to 40 cm apart and supported on end walls over which timber planking or boarding is fixed. Where the header joist span exceeds 4 feet 1219 mm the trimmer joists and the header joist shall be doubled and of sufficient cross section to support the floor joists framing into the header.

The weight of the timber floor itself consists of the timber joists the plasterboard ceiling underneath it except for suspended timber ground floors the floorboards and the nails or screws used to fix both of the aforementioned coverings. The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction. But larger is not always better when builders are constructing a home or adding a room addition. T ypes of floors 1.

The speedfloor steel joist system provides a simple effective solution to your floor structure requirements. Single joist timber beam. Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor. Mid floor joist to framed walls wall frame floor joist fixed to boundary joist with 3 10 16x16 hex head screws per tab bottom plate timber flooring glued and screwed to joists with wingtek screws boundary floor joist fixed to top plate.

The allowable clear spans have been calculated in accordance with bs 5268 2 2002 structural use of timber part 2. All the figures are based on normal domestic floor loadings where the floor construction is typically 18 25mm floor boards sheets with up to 12 5mm thick plasterboard and skim underneath. Framed triple joist timber floor. Single trimmer joists shall be used to carry a single header joist that is located within 3 feet 914 mm of the trimmer joist bearing.

Timber floor composite floor 3. With simple single span joists that are overlapped at the center beam or girder the reactions are equal at each end of the joists.