The Miniature Railway Supply Co Ltd
42 Stratford Way, Boxmoor Hemel Hempstead, Herts HP3 9AS ENGLAND Phone/24hr Answerphone/Fax 01442 214702 International Phone/Answerphone/Fax +44 1442 214702 www.miniaturerailwaysupply.com e-mail: sales@miniaturerailwaysupply.com |
5/8" High Aluminium Rail - Expansion Chart
4m Lengths |
The following conditions need to be met for the information in the table below to be valid: |
Fish bolt Hole diameter (obround) : 6.0mm x 4.3mm |
First hole centre from rail end : 9.525mm (3/8") |
Second hole pitch from first hole : 19.05mm (3/4") |
The rail ends must be sawn clean and square and free from burs etc |
The fish plates used are Miniature Railway Supply Company fish plates |
Miniature Railway Supply Company standard M4 obround neck fishbolts and nuts are used to secure the fish plates | This allows a maximum gap of 2.4mm with fishbolts in Standard configuration |
or gap of 3.3mm with fishbolts in High Expansion configuration (see here) |
The figures are per 4 metre lengths of rail |
The coefficient of expansion has been taken as 0.0255 millimetres per metre per degree C. |
The temperatures given below are that of the RAIL which is likely to be different to the ambient temperature |
To provide effective jointing you need to assume face to face joints at maximum rail temperature and therefore gap the joint as appropriate depending on the rail temperature when laid |
The operating range of this rail before putting joints under tension/compression is 25°C with standard configuration fishbolts or 35°C with High Expansion configuration fishbolts see here |
Click here for instructions on how to use this table |
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This data only applies to Miniature Railway Supply Company products |