The relaxation of stress in steel changes according to the variation in ________

The total losses of stress that could be encountered under normal conditions of work were recommended by ______

The creep coefficient varies from a minimum value of _______

The loss of change of temperature is between ________

The term Ec in losses developed by elastic deformation is expressed as ________

The cold drawn steel wires have a modulus of elasticity of ________

A rectangular concrete beam 360mm deep and 200mm wide, is prestressed by means of fifteen 5mm diameter wires located 65m…

The loss of prestress due to shrinkage is obtained by multiplying _______