Design Manual For Roads And Bridges - Loads For Highway

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Example text

Design loads. Nominal loads should be multiplied by the approporiate value of ya to derive the design load to be used in the calculation of moments, shears, total loads and other effects for each of the limit states under consideration. Values of y, are given in each relevant clause and also in table 1. 2 Additional factor yn. Moments, shears, total loads and other effects of the design loads are also to be multiplied by y, to obtain the design load effects. Values of y, are given in Parts 3, 4 and 5 of this standard.

94 I Appendix A Composite Version of BS 5400: Part 2 Volume 1 Section 3 Part 14 BD 37/01 NOTES FOR TABLES 3 to 5: NOTE 1. The horizontal wind loaded length shall be that giving the most severe effect. 5) for the element or structure under consideration, the wind loaded length is the base length. of the adverse area. Where there is more than one adverse area, as for continuous construction, the maximum effect shall be determined by consideration of any one adverse area or a combination of adverse areas, using the maximum wind gust speed V, appropriate to the base length or the total combined base lengths.

6. 1 Nominal superimposed dead load. Initial values for nominal superimposed dead load may be based on the densities of the materials given in BS 648. The nominal superimposed dead load initially assumed shall in all cases be accurately checked with the actual weights to be used in construction and, where necessary, adjustments shall be made to reconcile any discrepancies. Where the superimposed dead load comprises filling, eg on spandrel filled arches, consideration shall be given to the fill becoming saturated.

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