Arched girders or portal frames (straight girders able to be bent E04C3/02; inflatable E04H15/20)

Full Title

Structural elongated elements designed for load-supporting (as building aids E04G) > Arched girders or portal frames (straight girders able to be bent E04C3/02; inflatable E04H15/20)

Child Classifications

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• E04C 3/40 of metal (E04C3/46 takes precedence)
• E04C 3/42 of wood, e.g. units for rafter roofs (E04C3/46 takes precedence)
• E04C 3/44 of concrete or other stone-like material, e.g. with reinforcements or tensioning members (E04C3/46 takes precedence)
• E04C 3/46 of materials not covered by groups E04C3/40 - E04C3/44; of a combination of two or more materials