Load arrangements according to the UK National Annex

In building structures, any of the following sets of simplified load arrangements may be used at ULS and SLS (See Figure 2.7). < 5.1.3 & NA>

a) alternate spans carrying yGGk + YqQ with other spans loaded with yGGk; and b) any two adjacent spans carrying ycGk + yQQk with other spans loaded with yGGk.

a) alternate spans carrying yGGk + yQQj<; with other spans loaded with yGGk; and b) all spans carrying yGGk + yQQi<.

■ Or, for slabs only, all spans carrying yGGk + yGGk, provided the following conditions are met:

• In a one-way spanning slab the area of each bay exceeds 30 m2 (a bay is defined as a strip across the full width of a structure bonded on the other sides by lines of support).

• Ratio of the variable action, Qk, to the permanent action, Gk, does not exceed 1.25.

• Magnitude of the variable action excluding partitions does not exceed 5 kN/m2.

Where analysis is carried out for the single load case of all spans loaded, the resulting moments, except those at cantilevers, should be reduced by 20%, with a consequential increase in the span moments.

Note

Whilst the use of Exp. (6.10) is indicated, these arrangements may equally be used with Exp. (6.10a) or (6.10b).

Figure 2.7

Load arrangements for beams and slabs according to UK NA

Note

Whilst the use of Exp. (6.10) is indicated, these arrangements may equally be used with Exp. (6.10a) or (6.10b).

Figure 2.7

Load arrangements for beams and slabs according to UK NA

Greener Homes for You

Greener Homes for You

Get All The Support And Guidance You Need To Be A Success At Living Green. This Book Is One Of The Most Valuable Resources In The World When It Comes To Great Tips on Buying, Designing and Building an Eco-friendly Home.

Get My Free Ebook


Post a comment