ii) Steel rails are laid at a temperature of 20°C. What should be the clearance between the rails if the maximum temperature expected is 55°C for no stress in the rails? If the actual clearance...

ii) Steel rails are laid at a temperature of 20°C. What should be the clearance between the rails if the maximum temperature expected is 55°C for no stress in the rails? If the actual clearance provided is half this value, what will be the stress in the rails at the maximum temperature? Es = 200 GPa and αs = 12 × 10–6/°C