Hand (unit) radix numbering system, where a hand is four inches. The hand, sometimes also called a handbreadth or handsbreadth, is an anthropic unit, originally based on the breadth of a male human hand, either with or without the thumb, or on the height of a clenched fist. On surviving Ancient Egyptian cubit-rods, the royal cubit is divided into seven palms of four digits or fingers each. Five digits are equal to a hand, with thumb; and six to a closed fist. The royal cubit measured approximately 525 mm, so the length of the ancient Egyptian hand was about 94 mm. In
Height restriction laws restriction was announced. The restriction was enforced by a regional regulation, however, how much this is enforced is in question. Buildings in Raffles Place, Marina Centre, Marina Bay Sands, Bugis and Kallang have height restrictions of up to 280m because of the proximity of Paya Lebar Airbase. In Europe, there is no official general law restricting the height of structures. There are however height restriction laws in many cities, often aimed to protect historic skylines. In Athens, buildings are not allowed to surpass twelve floors so as not to block the view towards the Parthenon. There are several exceptions though,