Elevator safety arrangement and elevator

An elevator safety arrangement comprising

• a hoistway;
• an elevator car mounted in the hoistway;
• a working platform mounted on top of the roof the elevator car;
• at least one sensing arrangement for sensing load of the working platform;
• wherein said sensing arrangement comprises a sensor for sensing position of the working platform, and in that the working platform comprises a planar upper tread surface for a person to stand on, and a detent member above the level of said planar upper tread surface of the working platform, and the sensor for sensing position of the working platform is in vertical direction between the car roof and the detent member.