Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
  • E04F11/02—Stairways; Layouts thereof
  • E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
  • E04F11/032—Spiral stairways supported by a central column
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
  • E04F11/02—Stairways; Layouts thereof
  • E04F2011/0203—Miscellaneous features of stairways not otherwise provided for
  • E04F2011/0205—Stairways characterised by the use of specific materials for the supporting structure of the treads
  • E04F2011/0209—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of metal

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Steps, Ramps, And Handrails (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=6631346

Family Applications (1)

Country Status (5)

Families Citing this family (5)

• 1973
  • 1973-06-29 NL NL7309074A patent/NL7309074A/xx unknown
  • 1973-07-03 GB GB3176273A patent/GB1403659A/en not_active Expired
  • 1973-07-04 FR FR7324829A patent/FR2191003B3/fr not_active Expired
  • 1973-07-04 AT AT590673A patent/AT323981B/de not_active IP Right Cessation
  • 1973-07-04 CH CH976373A patent/CH560305A5/xx not_active IP Right Cessation

Also Published As

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