To make a bolt of a hunch plate into a mounting constitution without the occurrence of drop out and to impart the cutoff performance to the bolt.
The drop out preventing body 1 for the temporary fixing is held with elastic force to the hunch plate 2 used for a composite slab formed by casting concrete. The drop out preventing body 1 is closely held by inserting the bolt 7 to the inner diameter part and prevents the occurrence of the drop out even during the transportation. The outer shape part is made of an approximately cylindrical elastic member which is closely held to the hunch plate 2. The end part of the drop out preventing body 1 for the temporary fixing is divided and easily elastically deformable. The drop out preventing body 1 for the temporary fixing has a sealing function. Therefore, water is prevented from permeating.
TAKANO YASUYUKI
KIMURA MASAAKI
YOKOGAWA BRIDGE CORP
Sadao Enjoji
Tsutomu Yamada