[DISPLAY_ULTIMATE_SOCIAL_ICONS] Paste your Google Webmaster Tools verification code here

Expansion switch:

An assembly comprising two rails appropriately matched and fastened at the longitudinal interface to provide virtual continuity of the running rail and gauge faces while allowing controlled longitudinal slip.Expansion switches provide a level of control for rail stresses when tracks are attached to sub-structures (eg steel underbridges) which are also subject to temperature related expansion and contraction.