Timber Floor Design Tables

Common timber sizes used in floor construction.

Timber floor design tables. The design capacity tables for timber dctt is a design aid for structural engineers. Capacity determination performance prediction of known members. Eurocode 5 span tables. Wood joist span tables of residential structural design we were just about to make our example house wider.

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. For any other situation these tables may not be appropriate and you should refer to the. Aitc beam capacity tables. Using floor beam span tables.

Easy to look up tables allow the reader to choose the size of solid softwood timber members necessary to give adequate support to floors ceilings and roofs in dwellings. These tables are provided as a guideline. Apa provides span tables for apa structural use panels. Southern pine council provides a range of span tables for southern pine joists and rafters.

Once we go beyond the allowable spans for floor joists as shown in the floor joist span tables we will need some kind of support under these floor joists. Aitc capacity tables provide the uniformly distributed load that a glued laminated timber beam can support based on beam size span and material properties. Western wood products association provides the western lumber span tables book in digital format. 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.

Now in its 4th edition the trada span tables publication is a must for any designer or builder. Geometry loading spacing bearing conditions etc. The following easi joist span tables are to be used as a basic guide to achievable joist span for given depth and spacing and should be used for estimating of feasibility only. American wood council offers a range of span tables.

Due to variations in timber grades load sets support conditions and bearing widths the tables are not suitable as a design tool. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. It provides assistance in the limit states modelling of timber behaviour and can be used for. The allowable clear spans have been calculated in accordance with bs 5268 2 2002 structural use of timber part 2.

Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing 12 16 19 2 24 12 16. Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads. Floor truss span chart each individual floor truss design is unique based on multiple variables. Design the selection of members to carry given design loads.