ght have restrictions on erecting towers and antennas on their buildings. A full and fair description of the work to be done, weight and size of equipment and ancillaries is provided to the owners. They are assured of the safety of the building to obtain permission for making minor drilling and chipping of the roof reinforcements. Site access is arranged for long working hours while the site is implemented and also at night in the case of any emergency or for routine maintenance. The site is secured from unauthorised entry or attempts of vandalism. The staircase should be wide enough to turn the equipment while lifting it to the top. In the absence of a clear space for lifting the equipment, it is hoisted up the side of the building using a chain and pulley arrangement, which requires a clear space at the side of the building. There should not be any obstructions from electrical wires or junctions and proximity to glass walls. Lastly, the building owner should be able to arrange for a commercial power supply. Below are some of the basic questions and factors to be considered about the feasibility of the site before it is acquired. Statutory Restrictions Local authorities, municipal or central governments, city council and development boards restrict the maximum height permissible of buildings, including roof-mounted constructions like towers and anten- nas. In many countries simple reasons such as the conservation of building uniformity or preservation of the beauty of buildings can be the sole reason why that building cannot be provided to the operator for commercial use. Defence organisations, airport authorities, TV and radio broadcast agencies can raise objections against putting up towers and antennas close to their installations. Sites in the vicinity of hospitals and diagnostic centres are avoided as they may cause interference with the sensitive medical equipment. Where there is a lack of choices available permission should be taken from such entities to avoid any hassles later on. Legal disputes or charg