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NI-wide·Technical Booklet D Structure

an indication of the proposed construction sequence, if this is not obvious to a competent contractor. This is particularly relevant to refurbishments and new basements to existing buildings.

NI-wide·Technical Booklet D Structure

Note that these regulations apply to non-domestic clients, designers and contractors no matter what the duration or size of the project.

NI-wide·Technical Booklet D Structure

Small single storey building – a building that is not a dwelling having dimensions not greater than those given in paragraph 4C.40.

NI-wide·Technical Booklet D Structure

BS 5628: Part 1. BS 5628: Part 2. BS 5628: Part 3.

NI-wide·Technical Booklet D Structure

Table 3.1 Building classes Class Building type by height, floor area and/or occupancy 1 Single family houses of not more than 4 storeys Agricultural buildings Buildings into which people rarely go,

NI-wide·Technical Booklet D Structure

The nominal length of loadbearing wall construction referred to in paragraph 3.6(b) should be taken as follows — (a) in the case of a reinforced concrete wall, the distance between lateral supports, s

NI-wide·Technical Booklet D Structure

Table 4B.5 Maximum clear span of floor joists (m): Timber strength class C16 C16 Size of joist (mm x mm) with Dead Load [kN/m2] excluding the self weight of the joist at three load levels: - Not more

NI-wide·Technical Booklet D Structure

Table 4B.6 Maximum clear span of floor joists (m): Timber strength class C24 C24 Size of joist (mm x mm) | Dead Load [kN/m²] excluding the self weight of the joist Not more than 0.25 | More than 0.2

NI-wide·Technical Booklet D Structure

Table 4B.23 Maximum clear span of rafters (m); Roof pitch more than 22.5° but not more than 30°; Imposed load 1.00 kN/m2; Timber strength class C16 Dead Load [kN/m2] excluding the self weight of the

NI-wide·Technical Booklet D Structure

Table 4B.24 Maximum clear span of purlins supporting rafters (m); Roof pitch more than 22.5° but not more than 30°; Imposed load of 1.00 kN/m2; Timber strength class C16 Dead Load [kN/m2] excluding t

NI-wide·Technical Booklet D Structure

Table 4B.35 Maximum clear span of flat roof joists (m); Access only or cleaning and maintenance; Imposed load 0.75 kN/m²; Timber strength class C16 Dead Load [kN/m²] excluding the self weight of the

NI-wide·Technical Booklet D Structure

Table 4B.36 Maximum clear span of flat roof joists (m); Access only for cleaning and maintenance; Imposed load 0.75 kN/m²; Timber strength class C24 C24 Dead Load [kN/m²] excluding the self weight of

NI-wide·Technical Booklet D Structure

Table 4B.37 Maximum clear span of flat roof joists; Access only for cleaning and maintenance; Imposed load 1.00 kN/m²; Timber strength class C16 C16 Dead Load [kN/m²] excluding the self weight of the

NI-wide·Technical Booklet D Structure

Table 4B.38 Maximum clear span of flat roof joists (m); Access only for cleaning and maintenance; Imposed load 1.00 kN/m²; Timber strength class C24 C24 Dead Load [kN/m²] excluding the self weight of

NI-wide·Technical Booklet D Structure

Dead Load [kN/m2] excluding the self weight of the joist Size of joist (mm) Not more than 0.50 More than 0.50 but not more than 0.75 More than 0.75 but not more than 1.00 Spacing of joist (mm) 400 450

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

When using this Part of the Section the stability requirements in paragraph 4B.1 applies and the following procedure should be followed – Consider all of the Conditions relating to the building, of wh

NI-wide·Technical Booklet D Structure

The wall should not exceed 12 m in length, measured from centre to centre of buttressing walls, piers or chimneys providing restraint, and not exceed 12 m in height.

NI-wide·Technical Booklet D Structure

The height of a wall or a storey should be measured in accordance with the rules in Diagram 4C.6. (a) Measuring storey heights: A is the ground storey height if the ground floor is a suspended timber

NI-wide·Technical Booklet D Structure

Table 4C.6 Declared compressive strength (N/mm²) of masonry units complying with BS EN 771-1 to 5 Masonry unit: Clay masonry units to BS EN 771-1, Calcium silicate masonry units to BS EN 771-2, Aggre

NI-wide·Technical Booklet D Structure

Table 4C.7 Normalised compressive strength (N/mm²) of masonry units of clay and calcium silicate blocks complying with BS EN 771-1 and 2 Standard Condition Group 1 masonry units Group 2 masonry units

NI-wide·Technical Booklet D Structure

Mortar should be – (a) of mortar designation (iii) as given in BS 5628: Part 1; (b) strength class M4 as given in BS EN 998 -2; or (c) CEM1, lime and fine aggregate mixed in the ratio of 1:1:5 measure

NI-wide·Technical Booklet D Structure

If the external wall is solid construction the masonry units should have a compressive strength of at least that shown for the internal leaf of a cavity wall in the same position.

NI-wide·Technical Booklet D Structure

The guidance in the diagram for walls of two or three storey buildings should only be used to determine the compressive strength of the masonry units where the roof construction is of timber.

NI-wide·Technical Booklet D Structure

Irrespective of the materials used in the construction, a wall that provides vertical support to another wall should be not less in thickness than any part of the wall to which it gives vertical suppo

NI-wide·Technical Booklet D Structure

Internal loadbearing masonry walls should have a thickness not less than – except for a wall in the lowest storey of a 3 storey building, carrying load from both upper storeys, which should have a thi

NI-wide·Technical Booklet D Structure

The minimum thickness and maximum height of parapet walls should be as given in Table 4C.11.

NI-wide·Technical Booklet D Structure

Wall type: Thickness of wall (mm) / Maximum height of parapet H (mm). Where t1 + t2 is not greater than 200: t = 150 mm / 600 mm; t = 215 mm / 860 mm; t = 190 mm / 760 mm. Where t1 + t2 is greater tha

NI-wide·Technical Booklet D Structure

Where a wall is constructed of bricks or blocks having modular dimensions derived from BS 6750, the wall thicknesses prescribed in this Part which derive from a dimension of a brick or block may be re

NI-wide·Technical Booklet D Structure

buildings a) annexes flat roof buildings pitched roof buildings 3.0 m maximum 3.6 m maximum 3.0 m maximum maximum roof slope 40° 3.0 m maximum 3.0 m maximum 3.5 m maximum 4.5 m maximum 4.5 m maximum 3

NI-wide·Technical Booklet D Structure

One or two major openings not more than 2.1 m in height are permitted in one wall of the building or annex only. The width of a single opening or the combined width of two openings should not exceed 5

NI-wide·Technical Booklet D Structure

The only other openings permitted in an annex or building are for windows and a single leaf door. The size and location of these openings should be in accordance with Diagram 4C.16.

NI-wide·Technical Booklet D Structure

Walls should be tied horizontally at not more than 2 m centres to the roof structure at eaves level, base of gables and along roof slopes with straps fixed in accordance with Diagrams 4C.13 and 4C.17.

NI-wide·Technical Booklet D Structure

Notes: 1. Major openings should be restricted to one wall only. The aggregate width should be not greater than 5.0 m and their height should be not greater than 2.1 m. 2. There should be no other open

NI-wide·Technical Booklet D Structure

Wall thicknesses: 3.0 m maximum height. Minimum pier size (Ap x Bp) should be (390 mm x 190 mm) or (327 mm x 215 mm) depending on the size of the masonry units. Isolated columns (Case c) to be 325 mm

NI-wide·Technical Booklet D Structure

BS EN 197: Cement. Part 1: 2000 Composition, specifications and conformity criteria for common element. AMD 15209, AMD 17352 Part 2: 2000 Conformity evaluation. BS EN 336: 2003 Structural timber. Siz

NI-wide·Technical Booklet D Structure

BS EN 14081: Timber structures – Strength graded structural timber with rectangular cross section. Part 1: 2005 General requirements. BS 1297: 1987 Specification for tongue and grooved softwood floori

NI-wide·Technical Booklet D Structure

BS 8103: Structural design of low-rise buildings. Part 1: 1995 Code of practice for stability, site investigation, foundations and ground floor slabs for housing. AMD 8980 Part 2: 2005 Code of practic