2007 Indira Gandhi International Airport, New Delhi

Hangar for two B747 Aircraft

Basis of design

Richard was responsible for the sizing and concept design. On the basis of Richards experience of airport facility design at Heathrow’s British Airways Maintenance Base and other locations in UK he developed the following brief:

The requirement is for a twin B747/400 maintenance hangar. The level of maintenance is not specified, so Richard assumed that the hangar will be for used for all levels of maintenance including removal of major components such as engines, undercarriages and full checking of the airframe. Accordingly the brief includes the provision of gantries for lifting heavy components and positioning access staging.

The layout of the building has been designed to accommodate 2 no B747/400 aircraft and either nose first, or tail first entry into the building, depending on the philosophy of the aircraft maintenance manager.

Tail first entry into the building means the roof structure clearance of the hangar must be at a constant height (21.5m) to clear the tail fin. This method of entry facilitates ease of erection for the nose access staging and tug pull out when maintenance is complete via the hangar doors.

The support accommodation is planned in 2 halves for each hangar to provide a space in the centre for a tug should the maintenance manager prefer nose entry first.

The main components of the hangar are the hangar doors. The width of each hangar can be minimised by arranging the bunching of the doors so that the when access to say, the LH hangar, is required the RH door set bunches in front of the RH hangar and conversely when entry to the RH hangar is required the LH door set bunches in front of the LH hangar.

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The hangar layout is designed, so that when the outer door sets are bunched they do not project beyond the width of the building. This will facilitate the construction and possibly, structural sharing, for future adjacent hangars.

No information exists with regard to offices, store, special workshops/ facility areas and staff welfare, so the location of this accommodation is shown and it is assumed that this will be designed and constructed by the tenant. Similarly, only notional fire escape doors are shown: it assumed that the tenant will design and obtain approval for the fire strategy on the basis of the tenants known operation.

Program summary: 

Aircraft maintenance hangar sized to enable two B747/400 aircraft to be maintained simultaneously. Basic envelope size to be provided by the hangar for each aircraft is 75m x 75m x 21.5m high

Ability to position access staging as shown

Staff welfare accommodation for maintenance staff, comprising m and f changing, toilets, showers, lunch room and kitchen, nominal area to suit tenant’s requirements

Offices, stores and special workshops/facility areas to suit tenants requirements

Plant rooms to provide A/C for office, stores, workshops and staff welfare accommodation,

Key features:

Hangar doors to open full width of envelope size, 75m
Three 35 ton cranes required, supported on overhead gantries to access the aircraft as shown.
Tug access required for forward entry of aircraft