This is a structure for climbing up or down that consists essentially of two long side pieces joined at intervals by cross pieces on which one may step.
This is a structure for climbing up or down that consists essentially of two long side pieces joined at intervals by cross pieces on which one may step.
This is a structure for climbing up or down that consists essentially of two long side pieces joined at intervals by cross pieces on which one may step.
This is a structure for climbing up or down that consists essentially of two long side pieces joined at intervals by cross pieces on which one may step.
This is a structure for climbing up or down that consists essentially of two long side pieces joined at intervals by cross pieces on which one may step.
This is a structure for climbing up or down that consists essentially of two long side pieces joined at intervals by cross pieces on which one may step.