Abstract: A joint assembly for an arched building structure comprises a non-corrugated flat plate member and at least one corrugated plate member connected to and extending outwardly of the non-corrugated plate member. The corrugated plate member has proximal and distal ends with corrugations extending therebetween and the proximal end abuts the non-corrugated plate member. The corrugations extend in side-by-side relation in a straight line with the line extending in the lengthwise direction of the non-corrugated plate member. The corrugations may have a trapezoidal cross section though corrugations having other shapes may be used.

Abstract: An arched building structure comprises an arched coupling body, a still plate and a still, which support the arched coupling body on the ground. The arched coupling body is constituted by coupling two curved members with a plate member formed separate from the curved members. Each curved member is constituted by coupling multiple large steel decks bent with roundness in a wave direction.