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NI-wide·Technical Booklet D Structure

BS EN 1995-1-1(1). BS EN 1995-1-2(1). (1) To be read in conjunction with the associated National Annex and BS EN 1990.

NI-wide·Technical Booklet D Structure

The dimensions of a timber floor, ceiling or roof member may be determined by following either – (a) the guidance given in "Eurocode 5 span tables for solid timber members in floors, ceilings and roof

NI-wide·Technical Booklet D Structure

Table 4B.3 sets out a schedule of tables, which are preceded by notes and diagrams, that give spans, sizes and spacings for certain timber floor, ceiling and roof members.

NI-wide·Technical Booklet D Structure

Floor joists spanning in excess of 2.5 m should be strutted by one or more rows of solid or herringbone strutting in accordance with Table 4B.4. Solid strutting should be at least 38 mm timber thickne

NI-wide·Technical Booklet D Structure

Table 4B.4 Strutting to joists Joist span | No. of rows and position of strutting Not greater than 2.5 m | None Greater than 2.5 m but not greater than 4.5 m | 1 at mid-span greater than 4.5 m | 2 at

NI-wide·Technical Booklet D Structure

Table 4B.3 Schedule of Tables relating to timber members Construction | Timber members | Imposed loading kN/m2 | Table number C16 | C24 Floors | joists | 1.50 | 4B.5 | 4B.6 Ceilings | joists | 0.25 |

NI-wide·Technical Booklet D Structure

Notes: 1. The strength class given in this Table assumes that the species and grades of timber to be used are those described in Table 4B.1. 2. These Tables do not apply to trussed rafted roofs.

NI-wide·Technical Booklet D Structure

Tables 4B.7 to 4B.10 give the maximum clear span of a ceiling joist and the timber binder that provides support to the ceiling joists using timber strength class C16 and C24. See also Diagram 4B.4. T

NI-wide·Technical Booklet D Structure

Table 4B.7 Maximum clear span of ceiling joists (m) Timber strength class C16 C16 Dead Load [kN/m2] excluding the self weight of the joist Size of joist (mm) | Not more than 0.25 | More than 0.25 but

NI-wide·Technical Booklet D Structure

Table 4B.8 Maximum clear span of binders (m): Timber strength class C16 C16 Dead Load [kN/m2] excluding the self weight of the binder Size of binder (mm) | Not more than 0.25 | More than 0.25 but not

NI-wide·Technical Booklet D Structure

Table 4B.12 Maximum clear span of purlins supporting rafters (m); Roof pitch more than 15° but not more than 22.5°; Imposed load of 0.75 kN/m2; Timber strength class C16 C16. Dead Load [kN/m2] excludi

NI-wide·Technical Booklet D Structure

Table 4B.11 Maximum clear span of rafters (m); Roof pitch more than 15° but not more than 22.5°; Imposed load of 0.75 kN/m2; Timber strength class C16 C16. Dead Load [kN/m2] excluding the self weight

NI-wide·Technical Booklet D Structure

Table 4B.14 Maximum clear span of purlins supporting rafters (m); Roof pitch more than 15° but not more than 22.5°; Imposed load of 0.75 kN/m2; Timber strength class C24 C24 Dead Load [kN/m2] excludi

NI-wide·Technical Booklet D Structure

Table 4B.13 Maximum clear span of rafters (m); Roof pitch more than 15° but not more than 22.5°; Imposed load of 0.75 kN/m2; Timber strength class C24 C24 Dead Load [kN/m2] excluding the self weight

NI-wide·Technical Booklet D Structure

Table 4B.16 Maximum clear span of purlins supporting rafters (m); Roof pitch more than 15° but not more than 22.5°; Imposed load of 1.00 kN/m2; Timber strength class C16 C16 Dead Load [kN/m2 ] excludi

NI-wide·Technical Booklet D Structure

Table 4B.15 Maximum clear span of rafters (m); Roof pitch more than 15° but not more than 22.5°; Imposed load 1.00 kN/m2; Timber strength class C16 C16 Dead Load [kN/m2 ] excluding the self weight of

NI-wide·Technical Booklet D Structure

Table 4B.22 Maximum clear span of purlins supporting rafters (m); Roof pitch more than 22.5° but not more than 30°; Imposed load of 0.75 kN/m2; Timber strength class C24. Dead Load [kN/m2] excluding t

NI-wide·Technical Booklet D Structure

Table 4B.21 Maximum clear span of rafters (m); Roof pitch more than 22.5° but not more than 30°; Imposed load 0.75 kN/m2; Timber strength class C24. Dead Load [kN/m2] excluding the self weight of the

NI-wide·Technical Booklet D Structure

Table 4B.31 Maximum clear span of rafters (m); Roof pitch more than 30° but not more than 45°; Imposed load 1.00 kN/m²; Timbers strength class C16 C16 Dead Load [kN/m²] excluding the self weight of t

NI-wide·Technical Booklet D Structure

Table 4B.32 Maximum clear span of purlins supporting rafters (m); Roof pitch more than 30° but not more than 45°; Imposed load of 1.00 kN/m²; Timber strength class C16 C16 Dead Load [kN/m²] excluding

NI-wide·Technical Booklet D Structure

Table 4B.33 Maximum clear span of rafters (m); Roof pitch more than 30° but not more than 45°; Imposed load 1.00 kN/m2; Timber strength class C24 excluding the self weight of the rafter Not more than

NI-wide·Technical Booklet D Structure

Table 4B.32 Maximum clear span of purlins (m); Roof pitch more than 30° but not more than 45°; Imposed load 1.00 kN/m2; Timber strength class C24 excluding the self weight of the purlin Not more than

NI-wide·Technical Booklet D Structure

Table 4B.34 Maximum clear span of purlins supporting rafters (m); Roof pitch more than 30° but not more than 45°; Imposed load of 1.00 kN/m2; Timbers strength class C24

NI-wide·Technical Booklet D Structure

Tables 4B.35 to 4B.38 give the maximum clear span of joists for a flat roof using timber strength class C16 and C24. The sizes, spacings and spans given will safely support the dead loads stated in th

NI-wide·Technical Booklet D Structure

The section sizes are either sawn across the timber thickness in accordance with tolerance class 1 of BS EN 336 and processed in accordance with tolerance class 2 of BS EN 336 across the timber width

NI-wide·Technical Booklet D Structure

Tables 4B.35 to 4B.40 are for a slope of up to 10° from the horizontal. Clear roof joist span is the clear dimension measured horizontally between supports. Take the roof joist spacing as the dimensio

NI-wide·Technical Booklet D Structure

Maximum clear span of flat roof joists (m); Access not limited to the purposes of cleaning and maintenance; Imposed load 1.50 kN/m2; Timber strength class C24 Table provides maximum clear spans for j

NI-wide·Technical Booklet D Structure

Table 4B.41 Maximum clear span of purlins supporting decking or sheeting (m); Roof pitch more than 10° but not more than 35°; Imposed load of 0.75 kN/m2; Timber strength class C16 C16 Dead Load [kN/m

NI-wide·Technical Booklet D Structure

Table 4B.42 Maximum clear span of purlins supporting decking or sheeting (m); Roof pitch more than 10° but not more than 35°; Imposed load of 0.75 kN/m2; Timber strength class C24 C24 Dead Load [kN/m

NI-wide·Technical Booklet D Structure

BS EN 1992: Design of concrete structures. Part 1-1: 2004 General rules and rules for building. Part 1-2: 2004 General rules. Structural fire design. BS EN 1993: Design of steel structures. Part 1-1: