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BS 11-2015 pdf free download
BS 11-2015 pdf free download.Specification for dimensional properties and associated tolerances of railway rails.
This BS 11 specifies requirements for the dimensional properties and associated tolerances of railway rails of 24.8 kg/rn (50 Ib/yd) and greater linear mass which are not specified in BS EN 13674-1 or BS EN 13674-4.
For chemical and mechanical properties, grade designation, marking and certification requirements see BS EN 13674-1.
2 Normative references
The following document, in whole or in part, is normatively referenced in this document and is indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
BS EN 13674-1:2011, Railway applications — Track — Rail — Part 1: Vignole railway rails 46 kg/rn and above
3 Dimensions of rail sections
Rail section dimensional properties and mass per unit length shall conform to the appropriate values given in Figure 1 to Figure 14.
NOTE The rail sections in this British Standard were designed before the change to
SI units was planned. The original imperial dimensions used have been converted to
SI dimensions with an accuracy necessary for the retention of the previous imperial
profiles and properties of the rails.
4.1 Rail section profile
The dimensional tolerances shall conform to Table 1. Profile conformity gauges shall conform to BS EN 13674-1:2011, Annex E.
4.2 Fishbolt hole sizes and positions
The sizes and positions of fishbolt holes shall conform to Figure 15 and
Table 2 with tolerances as given in Table 3. In case of dispute, the fishbolt holes
in the rail shall be checked with templates and gauges of the type given in
Annex A and BS EN 13674-1:2011, Figure E.12 and Figure E.13.
After cold straightening a finished rail shall, when standing on its base or lying on its side, be capable of being pulled into a straight line and of retaining that position.
When checked using a 1 500 mm straight edge, the straightness of the rail shall conform to Table 4, measured as the maximum gap between the rail and the straight edge.BS 11-2015 pdf free download.
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