BS M 90:1997

Committees responsible
National foreword
Introduction
Specification
1 Scope
2 Normative references
3 Structure and overall dimensions
4 Stairs flight
5 Platform
6 Handrails
7 Elevation and stability
8 Controls
9 Emergency
10 Options
Annexes
A (normative) Geometry criteria for stair flight
    design
B (informative) Bibliography
Figures
A.1 Stair design data chart

Describes functional, performance and safety requirements for self-propelled passenger boarding stairs intended for cabin access to all types of aircraft commonly in service in international air transport, having a cabin door sill height equal to or above 2,54 m (100 in) above ground.

1.1 This International Standard specifies the functional, performance and safety requirements for self-propelled passenger boarding stairs intended for access to the cabin of all aircraft types commonly in service in international civil air transport with a cabin door sill height equal to or exceeding 2,54 m (100 in) over the ground.

1.2 The intent of this International Standard is not to specify equipment design, but rather to define minimum functional and performance requirements and highlight those criteria which are recognized as essential in the environment of international airports by aircraft and vehicle manufacturers as well as air-lines and handling agencies.

1.3 This International Standard shall be applied with due reference to national governmental regulations of the country where the vehicle is to be operated. The main though not exclusive areas in which such national regulations may apply are:

• — regulations concerning equipment for use by the public;
• — stability and other safety requirements applicable to elevating equipment.