Method of constructing elevator and construction-time elevator arrangement

A method of constructing an elevator comprising

• providing an elevator car in a hoistway, said elevator car comprising a cabin frame, and a temporary pulley beam assembly detachably mounted on the cabin frame;
• mounting (first mounting) a hoisting machine in a first position which first position is at a first vertical level in the hoistway;
• suspending (first suspending) said elevator car with a hoisting roping from said hoisting machine via said temporary pulley beam assembly;
• moving (first moving) said elevator car in the hoistway with said hoisting machine while it is in said first position and suspended by the roping via said temporary pulley beam assembly;
• mounting (second mounting) a hoisting machine in a second position which second position is at a second higher vertical level inside a machine room located above the hoistway;
• removing the temporary pulley beam assembly from the elevator car, comprising detaching the temporary pulley beam assembly from the cabin frame;
• suspending (second suspending) said elevator car with a hoisting roping from the hoisting machine mounted in said second position via said cabin frame without said temporary pulley beam assembly;
• moving (second moving) said elevator car in the hoistway with the hoisting machine while the hoisting machine is in said second position and said elevator car is suspended via said cabin frame without said temporary pulley beam assembly.