made from concrete or from natural or artificial stone (manufacture B28)

Full Title

Transverse or longitudinal sleepers (for switches or crossings E01B7/22); Other means resting directly on the ballastway for supporting rails > made from concrete or from natural or artificial stone (manufacture B28)

Child Classifications

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• E01B 3/30 Hollow sleepers
• E01B 3/32 with armouring or reinforcement (hollow sleepers E01B3/30)
• E01B 3/36 Composite sleepers
• E01B 3/38 Longitudinal sleepers; Longitudinal sleepers integral or combined with tie-rods; Combined longitudinal and transverse sleepers; Layers of concrete supporting both rails
• E01B 3/40 Slabs; Blocks; Pot sleepers; Fastening tie-rods to them
• E01B 3/42 combined with inserts of wood or other material