BS 2655-4:1969

Co-operating organizations
Foreword
Specification
1 General
1.1 Scope
2 Escalators
2.1 Design requirements
2.2 Steps
2.3 Landing plates
2.4 Combplates
2.5 Balustrading
2.6 Guards at ceiling intersection
2.7 Handrails
2.8 Driving machinery
2.9 Safety factors
2.10 Operating and safety devices
2.11 Machinery spaces
2.12 Main switches and wiring
2.13 Controllers
2.14 Lighting
2.15 Marking
3 Passenger conveyors
3.1 Design requirements
3.2 Treadway for pallet type passenger conveyors
3.3 Treadway for belt type passenger conveyors
3.4 Landing plates
3.5 Balustrading
3.6 Guards at ceiling intersection
3.7 Handrails
3.8 Driving machinery
3.9 Safety factors
3.10 Operating and safety devices
3.11 Machinery spaces
3.12 Main switches and wiring
3.13 Controllers
3.14 Lighting
3.15 Marking
Appendix
A Safe use of escalators and passenger conveyors
Table
1 Treadway speed/slope
Figures
1 Dimensions of balustrades and handrails
2 Comb teeth and belt or tread grooves
3 Examples of suitable forms of notice for
      escalator and passenger conveyor approaches

Construction and safety. Limits of speed, width and angles of inclination, methods of assessing loading. Guarding, handrails, steps or belts, driving machinery, safety devices. Potential hazards to users. Please see full details given in AMD 4421.

This part of the standard applies to the engineering and safety requirements for escalators and passenger conveyors.

The requirements for escalators are based on the steps being connected and driven by means of chains. Other types of construction may be adopted provided that the same standard of safety is achieved throughout.

The requirements for passenger conveyors are based on the use of two distinct types of treadway:

1. Platforms interconnected by chains or other suitable means, and provided with grooves on the tread surface in the direction of travel (these conforming to the specified requirements for escalators).

2. Continuous endless belts with longitudinal grooves formed on the tread surface.

Such aspects as limits of speed, width and angle of inclination are covered, together with methods of assessing contract loading. Also specified are requirements for guarding, handrails, steps or belts, driving machinery and safety devices.

Diagrams of a typical cross section and details of comb teeth and tread grooves are shown, containing limiting dimensions where applicable.

The subject of potential hazards to users is discussed in Appendix A .